Diffusible-dye releasing type dyes which couple to form colorless products
US4029503A · kind A · utility
11Cited by
11References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | May 7, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A diffusible-dye releasing type dye consisting of a radical which reacts with an oxidation product of a color developing principal agent in a color development process to yield a substantially colorless compound and a dye residue carrying water-soluble radicals. Its photographic uses are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.