Photochrome spiroindoline-oxazines
US4959471A · kind A · utility
20Cited by
1References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | May 1, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B11/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a photochrome compound having a spirooxazine structure in a, as such known manner. In accordance with the present invention conjugated diazole-napthoxazine or oxazole-, thiazole, benzoxazole-or benzthiazole systems are added to the basic structure. Improved absorption in the wavelength range .alpha. than 350 nm as well as improved migration properties are yielded by this means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.