Yellow pteridine having a hue-angle of at least 98
US6120956A · kind A · utility
3Cited by
1References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1999 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Apr 20, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B17/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The 2,4,5,7-tetraaminopyrimido[5,4-g]pteridine ##STR1## characterized by a hue-angle h of not less than 98, processes for preparing the pteridine I of the invention, novel, insoluble 2,4,5,7-tetraaminopyrimido[5,4-g]pteridine salts, their preparation and the use of the pteridines of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.