G03C 8/14
Oxidation of the chromogenic substances
G03C8/14 (Oxidation of the chromogenic substances) appears on 64 US grants and 0 published applications in this corpus.
Search patents in G03C- Granted patents
- 64
- Published applications
- 0
- Assignees
- 8
- Inventors
- 72
- Latest grant
- 21 Mar 1995
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 10 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- N-substituted triarylmethane sulfonamides and method of preparation21 Mar 1995US 5,399,709 APolaroid Corporation
- Reversible redox-controlled imaging method26 Jul 1994US 5,332,654 APolaroid Corporation
- Sulfonated xanthene dyes, and photographic products and processes employing these dyes23 Nov 1993US 5,264,322 APolaroid Corporation
- Reversible redox-controlled imaging methods2 Nov 1993US 5,258,279 APolaroid Corporation
- Sulfonated xanthene dyes, and photographic products and processes employing these dyes16 Feb 1993US 5,187,282 APolaroid Corporation
No published applications in this class yet.
Most cited
By later US patents
- Positive-working immobile photographic compounds which cleave by intramolecular nucleophilic displacement in alkali unless oxidized35US 3,980,479 AEastman Kodak Company · 1976
- Cyanoethyl-containing blocked development restrainers27US 4,009,029 AEastman Kodak Company · 1977
- Photographic materials with ballasted, alkali cleavable azo dyes21US 3,942,987 AEastman Kodak Company · 1976
- Diffusable dye-releasing compounds which are cleavable upon oxidation20US 3,954,476 AEastman Kodak Company · 1976
- Magenta image-providing phenylazo-naphthyl dyes17US 3,932,380 AEastman Kodak Company · 1976