Production of hardened gelatin layers by the addition of quaternary carbamoyl pyridinium compounds
US4014862A · kind A · utility
1Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1973 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Jul 6, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the production of hardened gelatin layers by means of quaternary carbamoyl pyridinium compounds. Preferably this method is used for the hardening of silver halide photographic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.