Dispenser for dispensing drops of a sterile liquid product containing a surfactant.
The dispenser addresses the issue of surfactant interaction with hydrophobic membranes by using a deformable reservoir and hydrophilic microporous membrane with air intake, ensuring sterility and complete dispensing of preservative-free ophthalmic products with surfactants, maintaining user-friendliness and preventing air suction.
Patent Information
- Authority / Receiving Office
- BR · BR
- Patent Type
- Patents
- Current Assignee / Owner
- LABORATOIRES THEA SAS
- Filing Date
- 2022-11-23
- Publication Date
- 2026-07-07
AI Technical Summary
Existing dispensers fail to effectively dispense preservative-free ophthalmic products containing surfactants due to surfactant interaction with hydrophobic membranes, leading to negative pressure and potential membrane rupture, and are not user-friendly for multidose use.
A dispenser with a deformable reservoir, a flexible bag, and a hydrophilic microporous membrane that allows liquid passage while preventing gas entry, combined with air intake means and optional moisture retention mechanisms, ensuring sterility and complete dose dispensing without membrane deformation.
The dispenser ensures sterility and complete dispensing of preservative-free ophthalmic products with surfactants, maintaining user-friendly operation and preventing air suction, suitable for multidose packaging.
Smart Images
Figure 00000026_0000 
Figure 00000027_0000 
Figure 00000028_0000