G03C 1/48561
Hydrazine compounds
Official title: {hydrazine compounds}
G03C1/48561 (Hydrazine compounds) appears on 37 US grants and 0 published applications in this corpus.
Search patents in G03C- Granted patents
- 37
- Published applications
- 0
- Assignees
- 6
- Inventors
- 59
- Latest grant
- 2 Jan 1996
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 6 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for making direct-positive photographic images2 Jan 1996US 5,480,770 AAgfa-Gevaert
- Method for making direct-positive photographic images12 Sep 1995US 5,449,595 AAgfa-Gevaert
- Silver halide photographic light sensitive material13 Jun 1995US 5,424,170 AKonica Corporation
- Silver halide photographic material5 Jul 1994US 5,326,683 AFuji Photo Film Co., Ltd.
- Silver halide photographic materials containing novel nucleating agent22 Jun 1993US 5,221,593 AKonica Corporation
No published applications in this class yet.
Most cited
By later US patents
- Photographic compositions and elements including internal latent image silver halide grains and acylhydrazinophenylthiourea nucleating agents therefor39US 4,030,925 AEastman Kodak Company · 1977
- Acyl hydrazino thiourea derivatives as photographic nucleating agents19US 4,031,127 AEastman Kodak Company · 1977
- Application of activated arylhydrazides to silver halide photography17US 4,478,928 AEastman Kodak Company · 1984
- Radiation-sensitive compositions and photographic elements containing N-(acylhydrazinophenyl) thioamide nucleating agents16US 4,080,207 AEastman Kodak Company · 1978
- Direct positive silver halide light-sensitive material16US 4,245,037 AFuji Photo Film Co., Ltd. · 1981