G03C 7/3012
Combinations of couplers having the coupling site in pyrazolone rings and photographic
Official title: {Combinations of couplers having the coupling site in pyrazolone rings and photographic additives}
G03C7/3012 (Combinations of couplers having the coupling site in pyrazolone rings and photographic) appears on 49 US grants and 0 published applications in this corpus.
Search patents in G03C- Granted patents
- 49
- Published applications
- 0
- Assignees
- 7
- Inventors
- 87
- Latest grant
- 11 Mar 2003
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Color photographic element comprising a multifunctional dye-forming coupler11 Mar 2003US 6,531,271 B1Eastman Kodak Company
- Color photothermographic element comprising a dye-forming system for forming a novel cyan dye11 Feb 2003US 6,517,981 B1Eastman Kodak Company
- Photographic elements containing aryloxypyrazolone couplers and sulfur containing stabilizers2 Apr 2002US 6,365,334 B1Eastman Kodak Company
- Photographic elements containing 2-equivalent pyrazolone couplers and process for their use18 Jan 2000US 6,015,657 AEastman Kodak Company
- Color photographic recording material having a 2-equivalent magenta coupler and a white coupler11 Jan 2000US 6,013,428 AAgfa-Gevaert
No published applications in this class yet.
Most cited
By later US patents
- Silver halide color photographic materials containing 3-anilino-5-pyrazolone couplers37US 3,930,866 AFuji Photo Film Co., Ltd. · 1976
- Color photographic light-sensitive material25US 4,585,728 AFuji Photo Film Co., Ltd. · 1986
- Color photographic light-sensitive material22US 4,483,918 AFuji Photo Film Co., Ltd. · 1984
- Silver halide color photographic materials containing 3-anilino-5-pyrazolone couplers14US 3,935,016 AFuji Photo Film Co., Ltd. · 1976
- Photographic material containing a coupler composition comprising magenta coupler, phenolic solvent, and at least one aniline or amine13US 5,376,519 AEastman Kodak Company · 1994