C09B 56/00
Azo dyes containing other chromophoric systems
C09B56/00 (Azo dyes containing other chromophoric systems) appears on 230 US grants and 135 published applications in this corpus.
Search patents in C09B- Granted patents
- 230
- Published applications
- 135
- Assignees
- 98
- Inventors
- 488
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 7 | 0 |
| 1981 | 12 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 8 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 12 | 0 |
| 1992 | 9 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 1 |
| 2004 | 2 | 5 |
| 2005 | 1 | 5 |
| 2006 | 5 | 7 |
| 2007 | 3 | 10 |
| 2008 | 3 | 2 |
| 2009 | 4 | 9 |
| 2010 | 6 | 10 |
| 2011 | 4 | 14 |
| 2012 | 9 | 9 |
| 2013 | 9 | 6 |
| 2014 | 12 | 9 |
| 2015 | 9 | 7 |
| 2016 | 6 | 11 |
| 2017 | 6 | 4 |
| 2018 | 4 | 4 |
| 2019 | 9 | 4 |
| 2020 | 3 | 4 |
| 2021 | 3 | 3 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 2 | 2 |
| 2025 | 2 | 5 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09B 56/04Stilbene-azo dyes58
- C09B 56/16Methine- or polymethine-azo dyes38
- C09B 56/02Azomethine-azo dyes33
- C09B 56/08Styryl-azo dyes24
- C09B 56/12Anthraquinone-azo dyes22
- C09B 56/14Phthalocyanine-azo dyes18
- C09B 56/005Azo-nitro dyes9
- C09B 56/20Triazene-azo dyes4
All 10 subgroupsShow fewer
Recent patents
- Reactive navy to black dye composition and dye product thereof6 Jan 2026US 12,516,194 B2Shanghai Kehua Dyestuff Industry Co., Ltd.
- Imaging compounds for detecting or imaging senescent cells16 Dec 2025US 12,496,361 B2University of Dundee
- Infrared-light-transmitting ink of dark color, and infrared-light-reflecting sheet obtained using same13 May 2025US 12,297,359 B2Dai Nippon Printing Co.Ltd.
- Dichroic azo-azomethine dyes for liquid crystal compositions22 Oct 2024US 12,122,919 B2BASF SE
- Disperse azo dyes, a process for the preparation thereof and the use thereof2 Apr 2024US 11,946,198 B2Huntsman Textile Effects (Switzerland) GmbH
- Imaging compounds for detecting or imaging senescent cells19 Mar 2026US 2026/0077067 A1University of Dundee
- Infrared-light-transmitting ink of dark color, and infrared-light-reflecting sheet obtained using same21 Aug 2025US 2025/0263565 A1Dai Nippon Printing Co.Ltd.
- Imaging compounds for detecting or imaging senescent cells10 Apr 2025US 2025/0114483 A1University of Dundee
- Dibenzoxanthene Quenchers, Uses, and Methods of Preparation20 Mar 2025US 2025/0092261 A1Life Technologies Corporation
- Pigment preparations13 Mar 2025US 2025/0084251 A1LANXESS Deutschland GmbH
Most cited
By later US patents
- Imaging members with bichromophoric bisazo perylene photoconductive materials64US 5,077,161 AXerox Corporation · 1991
- Optical diagnostic agents for diagnosis of neurodegenerative diseases by means of near infrared radiation (NIR radiation)41US 6,329,531 B1Schering Corporation · 2001
- Stilbene dyestuffs and light-polarizing films or sheets containing stilbene39US 5,272,259 ABayer Aktiengesellschaft · 1993
- Light-polarizing films or sheets containing stilbene dyestuffs35US 5,007,942 ABayer Aktiengesellschaft · 1991
- Dark quenchers for donor-acceptor energy transfer34US 7,019,129 B1Biosearch Technologies, Inc. · 2006