Method of preparing coupler dispersions for photographic use
US5024929A · kind A · utility
6Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1990 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Apr 30, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/924
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of preparing a coupler dispersion in gelatin by separating the auxiliary coupler solvent using a hydrophilic membrane having a pure size less than 175 Angstroms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.