Photochromic 3-pyrryl fulgides and fulgimides
US4737449A · kind A · utility
5Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Jan 24, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/163
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A series of novel 3-pyrryl fulgides and fulgimides are disclosed which are photochromic. The photochromic compounds are coloured by subjecting them to irradiation in the near ultraviolet and will revert to the colourless form on exposure to visible light, especially light having a wavelength in 600 to 650 nm band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.