Photochromic compounds
US6303673A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Jun 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A photochromic compound has the formula (I) wherein R.sup.1 is selected from the group including substituted amino aryl moieties, substituted cyclic amino aryl moieties and substituted N-indolinoaryl or N-tetrahydroquinolino aryl groups, R.sup.3 is selected from the group including linear or branched C.sub.1 -C.sub.20 alkyl, linear or branched C.sub.2 -C.sub.20 alkenyl or polyalkenyl, C.sub.2 -C.sub.20 alkynyl or polyalkynyl, aryl, heteroaryl, linear or branched C.sub.1 -C.sub.20 alkyl aryl, linear or branched C.sub.1 -C.sub.20 alkyl-cycloalkyl or -bicycloalkyl or -tricycloalkyl or substituted -cycloalkyl or -bicycloalkyl or -tricycloalkyl, linear or branched C.sub.1 -C.sub.20 haloalkyl or perhaloalkyl, linear or branched C.sub.1 -C.sub.20 alkoxyalkyl or peralkoxyalkyl, linear or branched C.sub.1 -C.sub.20 alkylthioalkyl or peralkylthioalkyl, linear or branched C.sub.1 -C.sub.20 amino alkyl or peraminoalkyl, C.sub.3 -C.sub.20 cycloalkyl or substituted cycloalkyl, C.sub.4 -C.sub.20 bicycloalkyl or substituted bicycloalkyl, C.sub.6 -C.sub.20 tricycloalkyl or substituted tricycloalkl or linear or branched C.sub.1 -C.sub.20 hydroxyalkyl or perhydroxyalkyl; R.sup.4 and R.sup.5 which may…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.