C09B 45/025
Of azo-pyridone series
Official title: {of azo-pyridone series}
C09B45/025 (Of azo-pyridone series) appears on 12 US grants and 4 published applications in this corpus.
Search patents in C09B- Granted patents
- 12
- Published applications
- 4
- Assignees
- 5
- Inventors
- 38
- Latest grant
- 10 Sep 2002
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 4 |
By publication year. Applications have been published since 2001.
Recent patents
- Metallized azo thioether dyes10 Sep 2002US 6,447,981 B1Eastman Kodak Company
- Azo dyes, their preparation and use11 Aug 1981US 4,283,331 ACiba-Geigy Corporation
- 4-Sulphomethyl substituted hydroxypyridone azo dyestuffs30 May 1978US 4,092,308 ACiba-Geigy Corporation
- Fiber-reactive 2-hydroxy-pyrid-6-on-(3)-yl azo dyestuffs10 Jan 1978US 4,067,864 ACiba-Geigy Corporation
- 3-Sulfoalkyl-6-hydroxy-pyrid-(2)-one-containing azo dyestuffs2 Aug 1977US 4,039,523 ACiba-Geigy Corporation
- Optical recording medium and azo metal chelate compound16 Sep 2010US 2010/0233415 A1Mitsui Chemicals, Inc.
- Pentamethine cyanine azo complex dye compounds for optical data recording1 Jul 2010US 2010/0162495 A1
- Use of indolimium diazamethine cations for optical data recording15 Apr 2010US 2010/0093983 A1
- Pyridinone based azo dyes and thier metal complex salts25 Mar 2010US 2010/0075098 A1
Most cited
By later US patents
- 3-Sulfoalkyl-6-hydroxy-pyrid-(2)-one-containing azo dyestuffs13US 4,039,523 ACiba-Geigy Corporation · 1977
- Fiber-reactive 2-hydroxy-pyrid-6-on-(3)-yl azo dyestuffs8US 4,067,864 ACiba-Geigy Corporation · 1978
- 3-Sulphoalkyl-6-hydroxy-pyrid-(2)-ones7US 3,994,906 ACiba-Geigy Corporation · 1976
- 3-Halogeno-6-hydroxy-pyridone-(2) azo dyestuffs7US 4,017,477 ACiba-Geigy Corporation · 1977
- 4-Sulphomethyl substituted hydroxypyridone azo dyestuffs7US 4,092,308 ACiba-Geigy Corporation · 1978