Layers for photographic materials
US4898810A · kind A · utility
6Cited by
20References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1988 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | May 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/106
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to layers for photographic materials, which comprises a polysaccharide which is formed extracellularly by bacterial fermentation of glucose, maltose, sucrose or xylose, if appropriate in the presence of yeast, yeast hydrolysate or casein-hydrolysate, and with mono-, di- and/or tri-valent metal ions, forms gels having a solidification temperature between 24.degree. and 25.degree. C. Gellan gum has proved to be a particularly advantageous polysaccharide for use in the layers according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.