Photochromic compound
US5349065A · kind A · utility
34Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1992 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Nov 17, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K9/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound represented by the following general formula (II): ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a phenyl group, a benzyl group, a phenethyl group, an alkylamine group having 1 to 4 carbon atoms, or a dialkylamino group having 2 to 8 carbon atoms, and ##STR2## represents a nobornylidene group or bicyclo [3,3,1]9-nonylidene group which may have a substituent, and ##STR3## represents a pyridine, quinoline, pyrrole or benzothiophene group which may have a substituent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.