Photochronic compounds of the indolino-spiro-benzoxazine type
US5233038A · kind A · utility
13Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1991 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Dec 5, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D498/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to novel photochromic compounds of the family of indolino-spiro-oxazines, these compounds being distinguished by the fact that they correspond to the formula of an indolino-spiro-benzo-cyclodiazene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.