Photographic color couplers and photographic materials containing them
US5374511A · kind A · utility
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5Claims
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Key dates
| Filing date | Jun 7, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Jun 7, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/30529
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A 1-H-pyrazolo-[1,5-b]-1,2,4-triazole having a combination of an arylthio coupling-off group and a tertiary alkyl group attached via its tertiary carbon atom in the 6-position preferably has the general formula: ##STR1## wherein R.sup.1 is a tertiary alkyl group, PA1 R.sup.2 is an alkyl or substituted alkyl group, and PA1 X is a thioaryl or substituted thioaryl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.