Method and composition for hardening gelatin
US4877724A · kind A · utility
9Cited by
5References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Aug 31, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for hardening gelatin comprising combining the gelatin to be hardened with a compound of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and X.sup..THETA. are as herein defined. The compounds of this formula effectively harden gelatin with little or no after-hardening. These compounds are useful in hardening gelatin in photographic elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.