Collagen contact lens
US4264155A · kind A · utility
52Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Jul 9, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L89/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Improved soft contact lenses are made from collagen gels to which water-soluble organic polyhydroxy polymers are added, e.g. mucopolysaccharides, polyvinyl alcohols, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.