Organic pigments derived from benzocoumarin
US4177195A · kind A · utility
1Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1978 |
| Grant date | Dec 4, 1979 |
| Priority date | — |
| Expiry date | Apr 20, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This application teaches that yellow to orange organic pigments may be produced by reacting a benzocoumarin with a selected aromatic diamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.