Optical lenses having a scratch-resistant coating
US4594288A · kind A · utility
82Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Aug 1, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31507
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Lenses of allyl-N-ethylene glycol carbonate having enhanced resistance to scratching or abrasion can be formed by preparing a substrate of a polymer or copolymer of allyl-N-ethylene glycol carbonate, the substrate being at least partially polymerized. A thin film of a copolymer of allyl-N-ethylene glycol carbonate and of an allyl monomer is formed by overmolding on the substrate and polymerized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.