C09B 5/24
The heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2
Official title: the heterocyclic rings being {only} condensed with an anthraquinone nucleus in 1-2 or 2-3 position
C09B5/24 (The heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2) appears on 94 US grants and 61 published applications in this corpus.
Search patents in C09B- Granted patents
- 94
- Published applications
- 61
- Assignees
- 64
- Inventors
- 262
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 0 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 3 |
| 2005 | 3 | 2 |
| 2006 | 1 | 2 |
| 2007 | 1 | 5 |
| 2008 | 2 | 4 |
| 2009 | 1 | 6 |
| 2010 | 0 | 3 |
| 2011 | 1 | 6 |
| 2012 | 4 | 4 |
| 2013 | 3 | 0 |
| 2014 | 3 | 3 |
| 2015 | 2 | 0 |
| 2016 | 2 | 3 |
| 2017 | 2 | 4 |
| 2018 | 2 | 3 |
| 2019 | 4 | 6 |
| 2020 | 0 | 1 |
| 2021 | 6 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09B 5/44Azines of the anthracene series32
- C09B 5/2409Not provided for in one of the sub groups c09b5/26 - c09b5/6227
- C09B 5/34Anthraquinone acridones or thioxanthrones12
- C09B 5/26Carbazoles of the anthracene series11
- C09B 5/321.3 azoles of the anthracene series4
- C09B 5/42Pyridino anthraquinones1
- C09B 5/301,2 azoles of the anthracene series0
Recent patents
- Materials for organic electroluminescent devices30 Sep 2025US 12,433,160 B2Merck Patent GmbH
- Methods of using nucleotide analogues10 Jan 2023US 11,548,909 B2IsoPlexis Corporation
- Dye-based polarizing plate for infrared wavelength range using azo, anthraquinone, or cyanine compound19 Jul 2022US 11,391,873 B2Nippon Kayaku Kabushiki Kaisha
- Polysulfonated fluorescence dyes23 Nov 2021US 11,180,657 B2ATTO-TEC GmbH
- Vehicle headlight assembly12 Oct 2021US 11,142,646 B2E. I. Du Pont de Nemours and Company
- Disperse dyes for dyeing polyester fibres8 Oct 2026US 2026/0308841 A1University of Leeds
- Compounds and their applications15 Jan 2026US 2026/0015655 A1Sfc Co., Ltd.
- Materials for organic electroluminescent devices14 Mar 2024US 2024/0090327 A1Merck Patent GmbH
- Vehicle headlight assembly6 Apr 2023US 2023/0104878 A1DuPont Polymers, Inc.
- Nucleotide analogues26 May 2022US 2022/0162251 A1IsoPlexis Corporation
Most cited
By later US patents
- Dichroic light polarizers162US 6,049,428 AOptiva, Inc. · 2000
- Method and materials for thermostable and lightfast dichroic light polarizers82US 5,739,296 ARussian Technology Group · 1998
- Method for thermostable and lightfast dichroic light polarizers54US 6,174,394 B1Optiva, Inc. · 2001
- Pigment compositions41US 4,310,359 AToyo Ink Manufacturing Co., Ltd. · 1982
- Organic semiconductors and their manufacture37US 8,101,776 B2BASF SE · 2012