Method for making transparent polythiourethane substrates in particular optical substrates
US6887401B2 · kind B2 · utility
5Cited by
9References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2001 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Dec 1, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of fast curing polythiourethane transparent casted substrate, usable for making optical articles such as ophthalmic lenses, which comprises the steps of:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.