Photochromic compound and articles containing the same
US4720547A · kind A · utility
23Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1986 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Feb 5, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Described are photochromic spiro[indoline-2,3'[3H] pyrido [3,2-f][1,4]-benzoxazine compounds having a C.sub.1 -C.sub.4 monohaloalkyl or C.sub.1 -C.sub.4 polyhaloalkyl substituent on the indoline ring, and their use in plastic hosts to impart a photochromic response thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.