Spincasting process for producing a series of contact lenses having desired shapes
US5260001A · kind A · utility
24Cited by
15References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1992 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Aug 3, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0092
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved process for spincasting contact lenses with differently shaped concave lens surfaces from the same mold design comprises providing molds with uniformly shaped concave surfaces, and spincasting in the molds a series of polymerizable mixtures. Contact lenses with differently shaped concave lens surfaces are obtained by varying the ratio of the monomers and an organic diluent in the polymerizable mixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.