Photochromic compounds and methods for their use
US5936016A · kind A · utility
20Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Jan 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to photochromic compounds of spiroindoline2,3'!-naphthoxazine! structure, characterized in that they contain, in the 6' position, a group R.sub.6 chosen from the following groups: cyano and phenylsulfonyl linked via the sulfur atom to carbon 6', and methods of using such compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.