C09B 44/00
Azo dyes containing onium groups
C09B44/00 (Azo dyes containing onium groups) appears on 305 US grants and 104 published applications in this corpus.
Search patents in C09B- Granted patents
- 305
- Published applications
- 104
- Assignees
- 60
- Inventors
- 341
- Latest grant
- 5 Sep 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 29 | 0 |
| 1977 | 27 | 0 |
| 1978 | 17 | 0 |
| 1979 | 6 | 0 |
| 1980 | 16 | 0 |
| 1981 | 21 | 0 |
| 1982 | 9 | 0 |
| 1983 | 4 | 0 |
| 1984 | 8 | 0 |
| 1985 | 10 | 0 |
| 1986 | 4 | 0 |
| 1987 | 12 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 6 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 9 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 6 |
| 2003 | 4 | 12 |
| 2004 | 6 | 18 |
| 2005 | 9 | 3 |
| 2006 | 8 | 10 |
| 2007 | 9 | 9 |
| 2008 | 9 | 6 |
| 2009 | 3 | 5 |
| 2010 | 5 | 6 |
| 2011 | 4 | 4 |
| 2012 | 2 | 2 |
| 2013 | 3 | 2 |
| 2014 | 2 | 2 |
| 2015 | 4 | 3 |
| 2016 | 3 | 4 |
| 2017 | 4 | 4 |
| 2018 | 3 | 5 |
| 2019 | 4 | 1 |
| 2020 | 1 | 2 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Coloring composition, film, color filter, solid-state imaging element, and image display device5 Sep 2023US 11,746,239 B2FUJIFILM Corporation
- Thiophene azo dyes and laundry care compositions containing the same19 May 2020US 10,655,091 B2The Procter & Gamble Company
- Cationic direct dyes3 Dec 2019US 10,494,527 B2BASF SE
- Thiophene azo dyes and laundry care compositions containing the same8 Oct 2019US 10,435,651 B2The Procter & Gamble Company
- Agents for dyeing keratin fibres, containing at least one dimeric, dicationic azo dye with special substitution pattern10 Sep 2019US 10,406,089 B2Henkel AG & Co. KGaA
- Coloring composition, film, color filter, solid-state imaging element, and image display device2 Jul 2020US 2020/0207990 A1FUJIFILM Corporation
- Leather-like sheet and fiber structure13 Feb 2020US 2020/0048828 A1Kuraray Co., Ltd.
- Thiophene azo dyes and laundry care compositions containing the same14 Nov 2019US 2019/0345415 A1The Procter & Gamble Company
- Cationic Direct Dyes30 Aug 2018US 2018/0244924 A1BASF SE
- Method of Coloring Hair with Washfast Yellow Imidazolium Direct Dye Compounds22 Mar 2018US 2018/0078477 A1Noxell Corporation
Most cited
By later US patents
- Cationic imidazole azo dyes292US 5,708,151 ACiba Specialty Chemicals Corporation · 1998
- Azo dyes derived from 3-amino pyridine in hair dye compositions80US 4,025,301 ASociete Anonyme dite: L'Oreal · 1977
- Cationic diazo dyes for the dyeing of hair34US 5,879,413 AWarner-Jenkinson Europe Limited · 1999
- Indazole-azo phenyl compounds33US 3,935,183 AImperial Chemical Industries PLC · 1976
- Dyeing composition for keratinous fibers comprising a particular dicationic diazo dye30US 6,893,471 B2L'oreal · 2005