Method of preparing coupler dispersions for photographic use
US5108611A · kind A · utility
2Cited by
2References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1991 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Aug 16, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/388
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of preparing a coupler dispersion in gelatin by separating the auxiliary coupler solvent using a hydrophobic microporous membrane and contacting the opposite surface of the membrane with a coupler solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.