C09B 43/40
Preparation of azo dyes from other azo compounds: by substituting hetero atoms
Official title: by substituting hetero atoms by radicals containing other hetero atoms
C09B43/40 (Preparation of azo dyes from other azo compounds: by substituting hetero atoms) appears on 72 US grants and 18 published applications in this corpus.
Search patents in C09B- Granted patents
- 72
- Published applications
- 18
- Assignees
- 29
- Inventors
- 119
- Latest grant
- 12 Mar 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 3 |
| 2006 | 6 | 3 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Compound, composition, film, laminate, and display device12 Mar 2024US 11,926,575 B2Sumitomo Chemical Company, Limited
- Disperse azo dyes, a process for the preparation thereof and the use thereof17 Jul 2018US 10,023,742 B2Huntsman International LLC
- Azo compound, ink containing azo compound, and display and electronic paper containing the ink15 Aug 2017US 9,732,226 B2Mitsubishi Chemical Corporation
- Disperse azo dyes, a process for the preparation thereof and the use thereof28 Jun 2016US 9,376,570 B2Huntsman International LLC
- Azo compounds27 Nov 2007US 7,301,013 B2Clariant Finance (BVI) Limited
- Compound, composition, film, laminate, and display device11 Aug 2022US 2022/0251029 A1Sumitomo Chemical Company, Limited
- Disperse Azo Dyes, A Process for the Preparation Thereof and the Use Thereof1 Sep 2016US 2016/0251517 A1Huntsman International LLC
- Disperse Azo Dyes, A Process for the Preparation Thereof and the Use Thereof16 Jul 2015US 2015/0197637 A1Huntsman International LLC
- Azo compound, ink containing azo compound, and display and electronic paper containing the ink9 Jul 2015US 2015/0191601 A1Mitsubishi Chemical Corporation
- Phthalimidyl-Azo Dyes, Process for Their Preparation and Their Use17 Jul 2014US 2014/0196224 A1Huntsman International LLC
Most cited
By later US patents
- Amyloidosis and Alzheimer's disease diagnostic assay and reagents therefor27US 4,933,156 ASalutar, Inc. · 1990
- Amyloidosis and alzheimer's disease diagnostic assay and reagents therefor27US 5,039,511 ASalutar, Inc. · 1991
- Ink compositions containing disazo dyes21US 5,820,661 AZeneca Limited · 1998
- Process for preparing azo dyestuffs with ortho-azo cyano groups by cyano exchange of metal cyanides and halo dyestuffs19US 3,962,209 ABayer Aktiengesellschaft · 1976
- Phenyl-azo-anilino dyestuff13US 4,105,655 ABayer Aktiengesellschaft · 1978