Pyrazolone compounds and a process for their manufacture
US4609620A · kind A · utility
8Cited by
5References
1Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 9, 1985 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Apr 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/384
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula ##STR1## where Y is a tertiary group, X is hydrogen or a leaving group, and Q is hydrogen, amidino, alkyl or aryl, there being present in Y or Q a ballasting group which comprises 10 to 30 carbon atoms, exhibit a high secondary absorption in the blue region of the visible spectrum and are useful couplers in chromogenic monochrome negative material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.