Method for casting glass-plastic lenses comprising allyl diglycol carbonate plastic
US4246207A · kind A · utility
85Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 14, 1979 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | May 14, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing laminated glass-plastic lenses utilizing optically finished glass-ceramic mold components having specified thermal expansion, strength and thermal conductivity characteristics in a direct casting procedure wherein the lenses are cooled in the molds after curing to provide high selections of physically durable lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.