Antifogging plastic lens material
US5324573A · kind A · utility
5Cited by
23References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Dec 18, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3192
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An antifogging plastic material is disclosed that is particularly suitable for use as a disposable fog-resistant lens. The lens material comprises a substantially transparent polyester substrate; a layer of polyvinylidene chloride-containing polymer on the polyester substrate; a water permeable colloid layer on the polyvinylidene chloride-containing layer; and a polyvinyl alcohol-containing layer on the water permeable colloid layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.