Hydrogel contact lens for sustained drug release and drug release method using hydrogel contact lens for sustained drug release
US8940318B2 · kind B2 · utility
1Cited by
3References
4Claims
0Family size
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Key dates
| Filing date | Jan 15, 2010 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Jun 13, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/0017
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Disclosed is a sustainedly drug-releasing hydrogel contact lens which can sustainedly release an anionic medicament such as an allergy-treating agent in a mildly irritating and effective manner while achieving vision correction. Specifically disclosed is a hydrogel comprising ionic monomers composed of at least a cationic monomer and an anionic monomer, wherein the component ratio of the ionic monomers is 5 to 20 mol % inclusive relative to the total amount of monomers that constitute the gel, and the content of the anionic monomer is 15 to 25 mol % inclusive relative to the content of the cationic monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.