Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
130 results about "Diarylethene" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
In chemistry, diarylethene is the general name of a class of compounds that have aromatic groups bonded to each end of a carbon–carbon double bond. The simplest example is stilbene, which has two geometric isomers, E and Z.
Secure, optically-readable data medium
InactiveUS20020142248A1Photomechanical apparatusRecord information storageLight beamComputer science
A secure, optically readable data medium comprises a data-carrying zone readable by a read light beam, and at least a portion that is photosensitive, being provided with a photosensitive material and exposed to the read light beam. The photosensitive material contains an active compound taken from the family of diarylethenes.
Owner:DIXET
Method for preparing organic photochromic nanofibers
InactiveCN102071490AOvercome the disadvantage of low color fastness to washingOvercome the disadvantage of delaying photochromic discoloration reactionFilament/thread formingMonocomponent synthetic polymer artificial filamentFiberBattle fatigue
The invention relates to a method for preparing organic photochromic nanofibers, and the method comprises the following steps: dissolving organic photochromic compounds into a polymer solution so as to obtain a spinning solution; and preparing the spinning solution into nanofibers by using an electrostatic spinning technology, wherein the organic photochromic materials are spirooxazine type, spiropyrane type, diarylethene type, fulgide type and azo dye type photochromic materials, and the like; and the polymer materials refer to polyvinylpyrrolidone resins, polystyrene resins, polymethylmethacrylate resins, polyvinyl alcohol, polyethylene terephthalate (PET) resins and the like. The organic photochromic nanofibers prepared by the method provided by the invention have high sensitivity and excellent endurance performance, and can be applied to clothing materials for garments, shoes and hats, daily fabrics for fabrics and carpets, polymer fibers for cosmetics, discoloration windows, displays, chemical sensors and optical storage devices; and in the military field, the prepared organic photochromic nanofibers can be used for battle fatigues, tents, military machinery, and the like.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH
Protective layer for reimageable medium
InactiveUS7202006B2X-ray/infra-red processesPolyhalogenated compound compositionsImage resolutionChange color
Owner:XEROX CORP
Diarylethene derivatives and photochromic thin film prepared using the same
InactiveUS20030118924A1Organic chemistryPhotography auxillary processesDeposition processOptical communication
The present invention relates to a diarylethene derivative and a photochromic thin film using the same. More particularly, it relates to a diarylethene derivative and a photochromic thin film having excellent transparency prepared by depositing the same on the surface of a substrate, without crystallization or agglomeration to have effective photochromic property. This method also provides homogenous thin photochromic films with film thickness of a nano meter level and improved processability compared to conventional deposition processes thus, being suitable for coloring change with light repeatedly, optical information recording systems, and optical communication media.
Owner:KOREA RES INST OF CHEM TECH
Photochromic material and color dose meter using the same
To detect an irradiated radiation efficiently, so that the dose can be measured with high sensitivity. A photochromic material comprising an illuminant(s) which emits a light when irradiated with a radiation and a diarylethene photochromic compound(s) having a specific structure, and a color dose meter employing it.
Owner:MASAHIRO IRIE
Color-memorizing photochromic writing instrument, color-memorizing photochromic writing instrument set using the same and method for alternately expressing color-memorizing photochromic function of writing image
ActiveUS20060053975A1Retain colorExcellent in color-memorizing propertyWriting connectorsInksColor changesSolvent
A color-memorizing photochromic writing instrument, which comprises a writing tip portion connected to a light-shielding tubular member or refill; and a color-memorizing photochromic ink, wherein the ink is prepared by dissolving, dispersing or suspending a diarylethene photochromic compound in a vehicle containing at least a solvent and a binder, wherein the diarylethene photochromic compound is in a coloring state, and a color-memorizing photochromic writing instrument set comprising the writing instrument and a color-changing means.
Owner:THE PILOT INK CO LTD +1
Diarylethene fluorescent molecular switch and preparation method and application thereof
ActiveCN107652279AEasy to synthesizeImprove thermal stabilityOrganic chemistryFluorescence/phosphorescenceAggregation-induced emissionMolecular switch
The invention discloses an aggregation-induced emission type diarylethene fluorescent molecular switch and a preparation method and application thereof. The aggregation-induced emission type diarylethene fluorescent molecular switch is characterized in that an AIE radical is introduced to gain solid or aggregation strong emission capacity; two diarylethene can be used for quickly quenching fluorescence of fluorescent radicals which aggregate in the surrounding under the irradiation of ultraviolet rays or visible light, thus achieving the purpose of high fluorescent switch ratio. According to the light control type AIE-effect fluorescent molecular switch, the limitation that traditional fluorescent chromophore leads to fluorescence quenching is broken; in addition, the fluorescent molecularswitch in solid and aggregation state has the advantages of being high in switch ratio and high in fluorescence quenching efficiency by being compared with the fluorescent molecular switch in solution state; the fluorescent molecular switch is applicable to information storage under solid state and photoelectric devices and has potential application in biosensing and fluorescence imaging.
Owner:HUAZHONG UNIV OF SCI & TECH
Ink composition for color-memorizing photochromic writing instrument and writing instrument using the same
InactiveUS20070082977A1Excellent in color-memorizing propertyEfficiently formedInksCoatingsSolventDiarylethene
An ink composition for a color-memorizing photochromic writing instrument, which comprises a photochromic agent containing a diarylethene photochromic compound dissolved, dispersed or suspended in a vehicle containing at least a solvent and a binder.
Owner:THE PILOT INK CO LTD +1
Inkless reimageable printing paper and method
InactiveUS20080311494A1Keep for a long timeWide applicationPhotography auxillary processesOrganic chemistrySolventPolymer
An image forming medium includes a paper substrate and an imaging layer coated on or impregnated into a paper substrate, where the imaging layer is formed of an imaging composition that includes an alkoxy substituted diarylethene photochromic material dissolved or dispersed in a solvent or polymeric binder, and where the imaging composition exhibits a reversible transition between a colorless and a colored state.
Owner:XEROX CORP
Diarylethene structure similar compounds as well as preparation method and application thereof
ActiveCN103992290AStrong antiviral activityStrong anti-respiratory virus effectOxygen-containing compound preparationOrganic compound preparationAnti virusAntiviral drug
The invention discloses a group of diarylethene structure similar compounds as well as a preparation method and application thereof. The provided compounds have a structure of a general formula I. Moreover, the invention further provides medicinal compositions containing the compounds serving as active ingredients. Researches discover that the compounds have pharmacological activities of resisting influenza viruses, Coxsackie B3 viruses, AIDS viruses, hepatitis B viruses, hepatitis C viruses and the like. Therefore, the invention further provides the application of the compounds and the medicinal compositions containing the compounds serving as active ingredients in preparation of anti-virus medicaments. The invention lays a foundation for deeply researching and developing the application of the compounds as clinical medicaments. The general formula I is as shown in the specification.
Owner:MEDICINE & BIOENG INST OF CHINESE ACAD OF MEDICAL SCI
Dithiophene ethene functional material, and its preparing method and use
The invention belongs to the technical field of diarylethylene photic color-changing material, relating to a diarylethylene photic color-changing monomer or polymer whose main chain contains a single or plural alkyl fluorenes, which remarkably raise closed loop quantum efficiency of the material; and the long chain alkyl makes the polymer possess very good solubility, beneficial to polymer rotary coating to form film. The fluorescence of the polymer changes obviously before and after photic changing color, and thus the polymer has very good fluorescent ON and OFF performances. The synthesizing route is convenient and compact, and the polymerization degree is high. The material can be applied to the fields of high density information storage, molecular switches, molecular lead wires, etc.
Owner:FUDAN UNIV
Method for synthesizing ultrashort-wavelength photochromic diarylethene compound by using imidazole-thiophene aromatic heterocycle and application of compound
InactiveCN104098555AGood chemical stabilityImprove thermal stabilityOrganic chemistryRecord information storageCyclopenteneAryl
The invention discloses a method for synthesizing an ultrashort-wavelength photochromic diarylethene compound by using imidazole-thiophene aromatic heterocycle and an application of the compound. A photochromic material can maintain good photochromic performance in a solution or film, has weaker fluorescence when the open-loop state ranges from 265 nm to 276 nm, has high fluorescence when the closed-loop state ranges from 400 nm to 550 nm, can be applied to a fluorescent photoswitch, an anti-forgery technology, a short-wavelength high-density holographic optical storage material and the like, and compared with the symmetrical thiophene or benzothiophene octafluorocyclopentene material, the material preparing cost is lower, and the application prospect is broader.
Owner:JIANGXI SCI & TECH NORMAL UNIV
Dithienyl ethylene-trinaphthalene diphenyl imide near-infrared-fluorescence molecular switch and preparation method thereof
ActiveCN107033144AAddresses the disadvantage of not being able to fully switch a fluorophore on and offHigh speedOrganic chemistryFluorescence/phosphorescenceQuantum yieldImide
The invention discloses a dithienyl ethylene-trinaphthalene diphenyl imide near-infrared-fluorescence molecular switch, and a compounding method and application thereof. Multiple dithienyl ethylene are conjugated with single trinaphthalene diphenyl imide through oxygen bridge bonds, so that the defect that switching of a fluorophore cannot be controlled completely by the single trinaphthalene diphenyl imide can be overcome, and fluorescence switching speed and quenching efficiency can be enhanced effectively. The efficient butterfly dithienyl ethylene-trinaphthalene diphenyl imide is created, wherein the dithienyl ethylene is photochromic units and used for controlling illuminating and quenching of near infrared fluorescence clusters, and the trinaphthalene diphenyl imide is a fluorescence cluster used for emitting 650-800nm near infrared fluorescence, so that the obvious defects, such as low light stability, high compounding complexity, low fluorescence quantum yield and slow photoresponse, of near infrared diarylethene fluorescent molecular switches in the prior art are overcome.
Owner:HUAZHONG UNIV OF SCI & TECH
Triphyene derivative and application thereof
InactiveCN104529996AImprove thermal stabilityImprove quantum efficiencyOrganic chemistryColor/spectral properties measurementsAlkaneSolvatochromism
The invention relates to a triphyene derivative containing diarylethene and an application thereof. The triphyene derivative is obtained by the way that triphyene derivative halogeneated triphyene and bisthienylethenes containing trimethyl borate are in coupled reaction. The designed and compounded triphyene derivative has the characteristics of being good in heat stability, high in quantum efficiency, short in light response time and the like. In addition, a unique solvation color development phenomenon is shown in triphyene derivative alkane chloride. Consequently, the triphyene derivative containing the diarylethene not only can be used for full color display and information storage but also can be used for trace detection of the alkane chloride.
Owner:EAST CHINA UNIV OF SCI & TECH +1
9,10-diarylethene anthracene (CPASA) aggregation-induced light emitting molecule and preparation method thereof
InactiveCN103896825AGood aggregation-induced luminescent propertiesOrganic chemistryLuminescent compositionsEthyl acetateTetrahydrofuran
The invention discloses a 9,10-diarylethene anthracene (CPASA) aggregation-induced light emitting molecule, namely 9,10-bis{4-{N,N-di[4-(carbazole-9-yl)phenyl]amino}styryl}anthracene, yellow light is emitted in a solid state, and the maximum emission wavelength is 581nm. The compound CPASA is not dissolved in water but in organic solvents such as dimethyl formamide, tetrahydrofuran, chloroform, dichloromethane, ethyl acetate and acetone, does not emit light in organic solvents like dimethyl formamide and emits yellow fluorescent light in a water / dimethyl formamide mixed solvent, and the fluorescent light in the water / dimethyl formamide mixed solvent with the water content of 20% is the strongest. The CPASA has aggregation-induced light emitting property and has important application value in the fields of fluorescent switches and sensors, fluorescent probes, biomarkers and fluorescent imaging, organic light emitting devices and the like.
Owner:SOUTHEAST UNIV
Photochromic fluorescent polymer and preparation method thereof
InactiveUS7135132B2Maintain good propertiesImprove solubilityOrganic chemistryPhotosensitive materialsSolubilityNon destructive
The present invention relates to a photochromic fluorescent polymer and a preparation method thereof, and more particularly, to a photochromic fluorescent polymer having bonds between diarylethenes and aryethene-vinylene precursors with a weight average molecular weight of 500 to 1,000,000, which exhibits highly improved photochromic and fluorescent characteristics compared to conventional photochromic fluorescent materials and excellent solubility to organic solvents, thus being applicable for photofunctional materials and information processing device such as optical recording, optical switches, non-destructive optical recording materials.
Owner:KOREA RES INST OF CHEM TECH
Diarylethene organic photochromic material based on furan as well as preparation method and application thereof
InactiveCN107118757AStable in natureWith molecular switch spectral performanceOrganic chemistryFluorescence/phosphorescenceFuranN dimethylformamide
The invention provides a diarylethene organic photochromic material based on furan. The structural formula of the diarylethene organic photochromic material is of formula I as shown in the specification. The invention further provides a preparation method of the photochromic material. The preparation method comprises the following steps: in a reaction container, performing reaction on a substituted aldehyde compound based on diarylethene, dibromocyclopentene, potassium phosphate, a palladium catalyst, N,N-dimethylformamide or dioxane or tetrahydrofuran or methylbenzene for 1-24 hours at 20 DEG C to backflow temperature, cooling, filtering, extracting, performing spinning drying, and passing through a column, thereby obtaining a diarylethene compound of formula I. The photochromic material is simple and efficient in preparation method, high in yield, good in economy, high in on-scale production value and good in environmental-friendliness. The photochromic material has very good spectral properties, can be used for preparing multihoming photoelectric molecule switches, molecular lead elements, photochromic light emitting devices and the like.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Heat discoloration printing ink and method preventing board card from becoming too hot through heat discoloration printing ink
InactiveCN105348921ALow costRealize online temperature detectionInksThermometers using physical/chemical changesEpoxyCarbamate
The invention discloses a heat discoloration printing ink and a method preventing a board card from becoming too hot through the heat discoloration printing ink and belongs to the technical field of electronic circuit equipment. The heat discoloration printing ink is formed by mixing acrylic resin, epoxy resin, polyvinyl alcohol, barium sulfate, carbamate, 1-hydroxycyclohexylphenylketone, diarylethene, spiral dihydrogen indole, iodine and ferric oxide. The mixed raw materials are added into a high-speed dispersing agent to be dispersed and then is ground through a three-roller grinder. Surface-mounted elements on a plug-in circuit board are shielded, and the surface of a printed circuit board is coated with the heat discoloration printing ink in a silk-screen printing or spraying mode. According to the heat discoloration printing ink and the method preventing the board card from becoming too hot through the heat discoloration printing ink, the color of the heat discoloration printing ink can be changed when using temperatures are different, the temperature of the surface of the PCB can be directly and conveniently read, and application and popularization value is very good.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD
Photochromic diarylethene substituted with isoxazole group
InactiveUS6846934B2Good photochromic effectGood Photochromic PropertiesOrganic chemistryLayered productsFiberSolar cell
Novel photochromic diarylethenes substituted with an isoxazole group and the method of preparation are disclosed. Also disclosed are compositions made with the photochromic diarylethenes. The preparation of thin films with the photochromic diarylethenes or compositions thereof are disclosed. The photochromic diarylethenes or compositions thereof may be used, for example in recording materials, photochromic windows, indicating elements, plastic mirrors, photochromic filters, photo switches, photosensitive drums, recording elements, solar cells, lens, fibers and optical elements.
Owner:KOREA RES INST OF CHEM TECH
TPV (Thermoplastic Vulcanizate) used in automobile antenna material and preparation method of TPV
TPV (Thermoplastic Vulcanizate) used in an automobile antenna material is prepared by conducting dynamic vulcanization on a vulcanization mixture. The vulcanization mixture at least comprises the following raw materials in parts by weight: 0.1 to 3 parts of grafted thermoplastic polymer, 100 parts of vulcanizable elastomer, 50 to 200 parts of thermoplastic polyolefin, 0.01 to 10 parts of a cross-linking agent, and 10 to 100 parts of filling oil, wherein the grafted thermoplastic polymer is obtained by modifying a diarylethene compound. The invention relates to the field of TPV, in particular to the TPV used in the automobile antenna material and a preparation method of the TPV.
Owner:ANHUI XIONGYA PLASTIC TECH
Photochromic and electrochromic bifunctional compound and preparation method thereof
InactiveCN104402858APhotochromicFunctionalOrganic chemistryTenebresent compositionsElectrochromismAniline
The invention discloses a photochromic and electrochromic bifunctional compound and a preparation method thereof. A triphenylamine group is introduced into a photochromic diarylethene compound. So the synthesized compound contains a triphenylamine group and a photochromic diarylethene unit at the same time, and thus has the photochromic and electrochromic functions at the same time. The triphenylamine group and the diarylethene group are connected through a covalent bond, the characters of the two groups are not affected by each other, and the development of respective characters is assisted. If the compound is applied to the storage filed, an electrochromic open / close state is increased on the basis of photochromic open / close state, so that the storage capacity is doubled without increasing any storage medium. The bifunctional compound and preparation method thereof have an important theory and actual meaning for the researches on storage devices and switch devices.
Owner:TIANJIN UNIV
Color-memorizing photochromic writing instrument, color-memorizing photochromic writing instrument set using the same and method for alternately expressing color-memorizing photochromic function of writing image
Owner:THE PILOT INK CO LTD +1
Solar energy fuel and preparation method thereof
The invention relates to a solar energy fuel, wherein in an elastic aerogel comprising carbon nano-tubes and graphene, photoinduced isomers (such as azobenzene or a compound containing an azobenzene group, a spiropyran compound, a diaryl vinyl compound and the like) are grafted on the wall of the carbon nano-tubes. A purpose of the present invention is to provide a novel way adopting solar energy and overcome problems of energy storage, difficult equipment moving and the like in the existing way adopting solar energy. According to the present invention, carbon nano-tubes (or addition of graphene) is adopted to prepare the sheet-like (or flannel-like) elastic aerogel, and then two photoinduced isomers with stable structure and different energy levels are covalently grafted, or two photoinduced isomers with stable structure and different energy levels are covalently grafted on carbonnano-tubes, and then the functionalized carbon nano-tubes are adopted to prepare the sheet sponge-like elastic aerogel; and the prepared solar energy fuel of the present invention provides the novel approach for the solar energy utilization.
Owner:邢休东
Synthesis of 1,2-diarylethene compound
InactiveCN101723835AEasy to operateShort reaction timeOrganic chemistryOrganic compound preparationArylSynthesis methods
The invention provides a synthesis method of 1,2-diarylethene compound, in particular to a diarylethene compound which is prepared by taking polyethylene glycol with small molecular weight as a catalyst under the existence of anhydrous alkaline matters and through the condensation reaction between aryl aldehyde and aromatic compounds containing active methyl. The synthesis method has simple reaction process and posttreatment and less environmental pollution and is suitable for mass preparation of the compound.
Owner:SHAANXI NORMAL UNIV +1
Light-activated actuator element
InactiveUS20100016608A1Rapid responseSmall sizeOrganic chemistryMachines/enginesUltraviolet lightsLight driven
Disclosed is light-driven actuator element characterized in that, inter alia, it can be reduced to micrometer size, is rapidly responsive, and reversibly changes to enable repeated use. The light-driven actuator element includes a crystal of diarylethene compound which changes shape upon photoisomerization (e.g., the compound of Structural Formula (I) below, where R1 represents a hydrogen atom or methyl group and R2 represents a methyl group). The element can be a rod-shaped or plate-like microcrystal having a size on the order of micrometer. The element bends (or contracts) on irradiation with ultraviolet light and expands to return to the original size on irradiation with visible light.
Owner:IRIE
Optical recording material
InactiveUS20060097225A1Increased durabilityLiquid crystal compositionsPhotomechanical apparatusPhotoisomerizationSide chain
A novel photochromic liquid crystal comprising a diarylethene compound having both photochromic properties and liquid crystallinity. This compound is a photochromic diarylethene compound having a mesogen group in each of the two aryl groups. The photochromic liquid crystal provides a large change in birefringence by photoisomerization or phase transition, and has high durability against repeated changes in birefringence. A side-chain polymer liquid crystal containing the above photochromic liquid crystal is useful as an optical recording material. Such an optical recording material is capable of performing light modulation by irradiation with light near Tc thereof, and is applicable to photo operator devices, optical memories, and the like. Further, the optical recording material is useful as a material for a recording layer of an optical recording medium such as an optical disk or an optical memory card.
Owner:ASAHI GLASS CO LTD
Method for preparing 1,4-stereoregular polytriazole by copper ion liquid catalysis, 1,4-stereoregular polytriazole and application thereof
ActiveCN109265681AHigh yieldHigh molecular weightStampsChemical processes analysis/designSolventAzide
The invention discloses a method for preparing 1,4-stereoregular polytriazole by copper ion liquid catalysis. The method comprises the following steps: (1) under protection of inert gas, performing click polymerization on a binary alkynyl compound and a binary azide based compound in an organic solvent in the presence of copper ion liquid; (2) after reaction is ended, dissolving a product into theorganic solvent, adding the mixture into methyl alcohol to precipitate, collecting precipitates, and drying to constant weight, thereby obtaining 1,4-stereoregular polytriazole. The invention furtherdiscloses 1,4-stereoregular polytriazole and application thereof. The preparation method is efficient, gentle in condition, simple and liable to perform, and good in atomic economical efficiency; andthe prepared 1,4-stereoregular polytriazole is very high in molecular weight and yield. Obtained anionic conjugated polytriazole has potential application in aspects of biological detection and fluorescence detection; and the obtained tetraphenyl ethylene-diarylethene conjugated polytriazole can be used for anti-fake and duplicate materials.
Owner:SOUTH CHINA UNIV OF TECH
Aminosilyl-Substituted Diarylethene Compounds for Anionic Polymerisation
InactiveUS20170204119A1Reduce heat buildupImproved of tan δSilicon organic compoundsPolymer scienceEthylene
The invention related to novel compounds useful as modifying monomers and precursors for polymerization initiators. The invention further relates to a method of making the polymerization initiators and resulting polymers. The invention also relates to polymer compositions comprising the polymer of the invention and further components such as extender oils, fillers, vulcanizing agents etc., and to corresponding vulcanized polymer compositions and articles comprising vulcanized parts made from the vulcanized polymer composition.
Owner:TRINSEO EURO GMBH
Dual-erasable anti-counterfeiting technology with multistable state and continuously controllable reflection color and application thereof in field of optical information coding
ActiveCN111423868AImprove thermal stabilityStable outputTenebresent compositionsCommerceEngineeringAlkene
Owner:EAST CHINA UNIV OF SCI & TECH +1
Diarylethene type photochromic insecticidal compound and preparation method and purpose thereof
The invention relates to a diarylethene type photochromic insecticidal compound and a preparation method and a purpose thereof. Specifically, the invention discloses a compound as shown in formula (A) or an optical isomer or a cis-trans-isomer thereof, or an agricultural pharmaceutically acceptable salt, and the definitions of substituent groups are as stated in the description. The invention also discloses the preparation method and the purpose of the compound. The formula (A) is shown in the description.
Owner:EAST CHINA UNIV OF SCI & TECH
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com