7-methylidene-5-oxo-furo fused naphthopyrans
US5811034A · kind A · utility
20Cited by
31References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Oct 23, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D493/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Described are novel 7-methylidene-5-oxo-furo fused naphthopyran compounds having certain substituents at the 2 position of the pyran ring. Also described are polymeric organic host materials that contain or that are coated with such compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.