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3021 results about "Pt element" patented technology

Platinum is a chemical element with symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal.

Electroless deposition apparatus

An apparatus and a method of depositing a catalytic layer comprising at least one metal selected from the group consisting of noble metals, semi-noble metals, alloys thereof, and combinations thereof in sub-micron features formed on a substrate. Examples of noble metals include palladium and platinum. Examples of semi-noble metals include cobalt, nickel, and tungsten. The catalytic layer may be deposited by electroless deposition, electroplating, or chemical vapor deposition. In one embodiment, the catalytic layer may be deposited in the feature to act as a barrier layer to a subsequently deposited conductive material. In another embodiment, the catalytic layer may be deposited over a barrier layer. In yet another embodiment, the catalytic layer may be deposited over a seed layer deposited over the barrier layer to act as a “patch” of any discontinuities in the seed layer. Once the catalytic layer has been deposited, a conductive material, such as copper, may be deposited over the catalytic layer. In one embodiment, the conductive material is deposited over the catalytic layer by electroless deposition. In another embodiment, the conductive material is deposited over the catalytic layer by electroless deposition followed by electroplating or followed by chemical vapor deposition. In still another embodiment, the conductive material is deposited over the catalytic layer by electroplating or by chemical vapor deposition.

Catalyst for complete oxidation of formaldehyde at room temperature

The invention provides a high selectivity catalyst used for catalyzing and completely oxidizing formaldehyde with low concentration at room temperature. The catalyst can catalyze formaldehyde completely so as to lead the formaldehyde to be converted into carbon dioxide and water at room temperature. In addition, the conversion rate of formaldehyde remains 100% within a long period of time, without complex auxiliary facilities such as light source, a heating oven and the like, and external conditions. The catalyst comprises three parts which are inorganic oxide carrier, noble metal component and auxiliary ingredient. Porous inorganic oxide carrier is one of cerium dioxide, zirconium dioxide, titanium dioxide, aluminium sesquioxide, tin dioxide, silicon dioxide, lanthanum sesquioxide, magnesium oxide and zinc oxide or the mixture thereof or composite oxide thereof, zeolite, sepiolite and porous carbon materials. The noble metal component of the catalyst is at least one of platinum, rhodium, palladium, gold and silver. The auxiliary ingredient is at least one of the alkali metals of lithium, sodium, kalium, rubidium and cesium. The loading of the noble metal component used in the catalyst of the invention is 0.1 to 10% according to weight converter of metal elements and the selective preference is 0.3 to 2%. The loading of the auxiliary ingredient is 0.2 to 30% according to weight converter of metal elements and the selective preference is 1 to 10%. When the loading of the auxiliary ingredient is lower than 0.2% or higher than 30%, the activity of the catalyst for catalyzing and oxidizing formaldehyde at room temperature is decreased remarkably.

Barriers for polymer-coated implantable medical devices and methods for making the same

InactiveUS6953560B1Reduce and prevent and inflammationReduce and prevent proliferationStentsSurgeryHafniumPt element
An implantable medical device and methods for making the implantable medical device are disclosed. The implantable medical device includes a substrate. At least a portion of the substrate is coated with a first layer including a polymer containing a drug. A barrier overlies the first layer. The barrier significantly reduces the rate of release of the drug from the polymer, thereby sustaining release of the drug from the medical device for a longer time.The barrier may be a homogeneous layer overlying the first layer, or a number of discrete deposits over the first layer. Alternatively, the barrier may be intermixed with an outer portion of the first layer. The barrier material is biocompatible, and typically has a thickness ranging from about 50 angstroms to about 20,000 microns. Suitable materials for the barrier include, but are not limited to, inorganic compounds, such as inorganic silicides, oxides, nitrides, carbides, as well as pure metals such as aluminum, chromium, gold, hafnium, iridium, niobium, palladium, platinum, tantalum, titanium, tungsten, zirconium, and alloys of these metals. The barriers disclosed may be applied to the first layer by several techniques, depending on the material being applied. Exemplary deposition techniques include physical vapor deposition, alkoxide hydrolysis, and electroless plating.The implantable device may be a stent or a graft, among other possibilities.

Combination self-expandable, balloon-expandable endoluminal device

An endoluminal device, such as a stent or a vena cava filter, comprising at least one superelastic section and at least one plastically deformable section. The superelastic section may comprise, for example, a superelastic grade of nitinol, whereas the plastically deformable section may comprise, for example, gold, platinum, tantalum, titanium, stainless steel, tungsten, a nickel alloy, a cobalt ally, a titanium alloy, or a combination thereof. Each plastically deformable section may merely comprise a constrained portion of the superelastic section comprising a plastically deformable material, such as gold. The device enables deployment by a method comprising introducing the device into a body lumen with the device radially constrained in a first configuration having a first diameter; allowing the device to self-expand into a second configuration having a second diameter less than or equal to a fully-self-expanded diameter; and then optionally “fine-tuning” the device by forcibly expanding the device into a third configuration having a third diameter in a range between the second diameter and less than or equal to a fully-forcibly-expanded diameter. The superelastic and plastically deformable sections may be tubular sections placed end-to-end, such that the plastically deformable section can be conformed to fit a tapered section of a lumen.
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