G03C 7/4136
P-phenylenediamine or derivatives thereof
Official title: {p-Phenylenediamine or derivatives thereof}
G03C7/4136 (P-phenylenediamine or derivatives thereof) appears on 69 US grants and 22 published applications in this corpus.
Search patents in G03C- Granted patents
- 69
- Published applications
- 22
- Assignees
- 19
- Inventors
- 142
- Latest grant
- 7 Jul 2009
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 1 |
| 2002 | 5 | 7 |
| 2003 | 5 | 3 |
| 2004 | 6 | 3 |
| 2005 | 1 | 6 |
| 2006 | 2 | 0 |
| 2007 | 1 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Silver halide color photographic light-sensitive material7 Jul 2009US 7,556,918 B2FUJIFILM Corporation
- Silver halide color photographic light-sensitive material16 Sep 2008US 7,425,408 B2FUJIFILM Corporation
- Silver halide color photographic light-sensitive material27 Feb 2007US 7,183,044 B2Fuji Photo Film Co., Ltd.
- Imaging element containing a blocked photographically useful compound26 Sep 2006US 7,112,398 B2Eastman Kodak Company
- Silver-free black-and-white thermographic materials containing a benzoquinone and methods of imaging4 Apr 2006US 7,022,441 B2Eastman Kodak Company
- Silver halide color photographic light-sensitive material15 May 2008US 2008/0113305 A1FUJIFILM Corporation
- Silver halide color photographic light-sensitive material8 Mar 2007US 2007/0054224 A1Fuji Photo Film Co., Ltd.
- Silver-free black-and-white thermographic materials containing a benzoquinone and methods of imaging25 Aug 2005US 2005/0186518 A1Eastman Kodak Company
- Black-and-white thermographic material containing dye-forming chemistry25 Aug 2005US 2005/0186519 A1Eastman Kodak Company
- Package for photographic processing chemicals23 Jun 2005US 2005/0133530 A1AgfaPhoto GmbH
Most cited
By later US patents
- Phenoxy carbonyl derivatives of a paraphenylenediamine color developer and their use in an image-receiving sheet for color diffusion transfer31US 4,060,418 AGAF Corporation · 1977
- Color photographic light-sensitive material containing development precursor30US 4,157,915 AFuji Photo Film Co., Ltd. · 1979
- Dye-forming developers in an imaging material and process29US 4,426,441 AEastman Kodak Company · 1984
- Automatic developing machine for silver halide photographic light-sensitive materials26US 5,351,103 AKonica Corporation · 1994
- Method of forming a photographic dye image18US 4,481,268 AEastman Kodak Company · 1984