Silver-dispersing polypeptides
US7179885B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Sep 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/047
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Silver halide emulsions for photographic uses contain a nucleation peptiser having at least one region A of up to 100 amino acids. Region A can either consist of (i) at least two silver-binding amino acids and up to 98 amino acids between the two silver-binding amino acids, or can consist of (ii) a stretch of from 9 to 100 amino acids having a polarity corresponding to an average transfer free energy ΔF equal to or higher than +1.0 kcal/mol. The nucleation peptizer also has at least one region B (separated from region A) having at least 50 amino acids and having a polarity corresponding to an average transfer free energy equal to or lower than −1.0 kcal/mol and not containing methionine residues. The emulsion may also contain a growth peptiser having similar characteristics to the nucleation peptiser, but having a longer A region and a greater overall length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.