C09B 39/00
Organic dyes or closely-related compounds for producing dyes: other azo dyes prepared
Official title: Other azo dyes prepared by diazotising and coupling
C09B39/00 (Organic dyes or closely-related compounds for producing dyes: other azo dyes prepared) appears on 25 US grants and 6 published applications in this corpus.
Search patents in C09B- Granted patents
- 25
- Published applications
- 6
- Assignees
- 14
- Inventors
- 46
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 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 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bis-azo dyes for thin film polarizers and synthesis method12 May 2026US 12,624,212 B2The Hong Kong University of Science and Technology
- Process for colouring a thermoplastic polymer21 Oct 2025US 12,448,520 B2Rohm Co., Ltd.
- Composition, and optical film including the composition16 Jun 2020US 10,683,456 B2Sumitomo Chemical Company, Limited
- Metal free acid dyes, process for the production thereof and their use25 Jul 2017US 9,714,347 B2DyStar Colours Distribution GmbH
- Reaction of carbon black with diazonium salts, resultant carbon black products and their uses13 Nov 2007US 7,294,185 B2Cabot Corporation
- Bis-azo dyes for thin film polarizers and synthesis method21 Sep 2023US 2023/0295438 A1The Hong Kong University of Science and Technology
- Process for colouring a thermoplastic polymer29 Jun 2023US 2023/0203313 A1Rohm Co., Ltd.
- Composition, and optical film including the composition26 Oct 2017US 2017/0306237 A1Sumitomo Chemical Company, Limited
- Metal free acid dyes, process for the production thereof and their use5 Nov 2015US 2015/0315386 A1DyStar Coulours Distribution GmbH
- Reaction of carbon black with diazonium salts, resultant carbon black products and their uses17 Feb 2005US 2005/0034629 A1Cabot Corporation
Most cited
By later US patents
- Reaction of carbon black with diazonium salts, resultant carbon black products and their uses157US 5,851,280 ACabot Corporation · 1998
- Aqueous inks and coatings containing modified carbon products156US 5,672,198 ACabot Corporation · 1997
- Reaction of carbon black with diazonium salts, resultant carbon black products and their uses123US 6,042,643 ACabot Corporation · 2000
- Reaction of carbon black with diazonium salts, resultant carbon black products and their uses84US 5,900,029 ACabot Corporation · 1999
- Reaction of carbon black with diazonium salts, resultant carbon black products and their uses43US 6,494,946 B1Cabot Corporation · 2002