Hardening of hydrophilic colloids
US5807668A · kind A · utility
0Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1997 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Mar 17, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/136
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved method for increaseing the hardening in a photographic element is described. The hardener is an imidazolium compound of formula: ##STR1## and the imidazolium is used in conjunction with a hardening accelerator defined by: ##STR2## the substituents are listed in the specification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.