G03C 7/29
Azo dyes therefor
G03C7/29 (Azo dyes therefor) appears on 11 US grants and 0 published applications in this corpus.
Search patents in G03C- Granted patents
- 11
- Published applications
- 0
- Assignees
- 1
- Inventors
- 11
- Latest grant
- 10 May 1988
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Imidazole azo dyes10 May 1988US 4,743,683 ACiba-Geigy Corporation
- Polyazo dyestuffs having high UV absorption20 Oct 1987US 4,701,525 ACiba-Geigy Corporation
- Photographic material with heterocylic azo dye for the silver dye bleach process28 Apr 1987US 4,661,437 ACiba-Geigy Corporation
- UV-absorbent compounds, process for their preparation and their use as image dyes in photographic materials for the silver dye bleach process2 Sep 1986US 4,609,609 ACiba-Geigy Corporation
- Oil-soluble disazo dyes and their use in color-photographic recording materials for the silver dye bleach process4 Jun 1985US 4,521,591 ACiba-Geigy Corporation
No published applications in this class yet.
Most cited
By later US patents
- Photographic material containing sulphonic acid group containing disazo dyestuffs25US 4,118,232 ACiba-Geigy Corporation · 1978
- Sulfonic-acid-group containing disazo dyestuffs18US 4,051,123 ACiba-Geigy Corporation · 1977
- Photographic material with heterocylic azo dye for the silver dye bleach process5US 4,661,437 ACiba-Geigy Corporation · 1987
- Color-photographic recording material for the silver dye bleach process4US 4,379,819 ACiba-Geigy Corporation · 1983
- Oil-soluble disazo dyes and their use in color-photographic recording materials for the silver dye bleach process3US 4,521,591 ACiba-Geigy Corporation · 1985