C09B 1/56
Mercapto-anthraquinones
Official title: Mercapto-anthraquinones {(C09B1/007 takes precedence)}
C09B1/56 (Mercapto-anthraquinones) appears on 100 US grants and 26 published applications in this corpus.
Search patents in C09B- Granted patents
- 100
- Published applications
- 26
- Assignees
- 40
- Inventors
- 180
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 2 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 2 | 3 |
| 2005 | 1 | 3 |
| 2006 | 0 | 2 |
| 2007 | 2 | 1 |
| 2008 | 2 | 1 |
| 2009 | 2 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 2 |
| 2024 | 3 | 3 |
| 2025 | 0 | 1 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Simultaneously dyeing and flame-retardant finishing method for polyester based textile6 Oct 2026US 12,753,549 B2Daikyo Chemical Co., Ltd.
- Anthraquinone compound, liquid crystal composition containing said compound, and dimming element26 May 2026US 12,637,421 B2Nippon Kayaku Kabushiki Kaisha
- Anthraquinone compound, liquid crystal composition containing said compound, and dimming element24 Dec 2024US 12,172,951 B2Nippon Kayaku Kabushiki Kaisha
- Anthraquinone compound, liquid crystal composition containing said compound, and dimming element3 Dec 2024US 12,157,852 B2Nippon Kayaku Kabushiki Kaisha
- Anthraquinone compound, liquid crystal composition for dimming including said compound, and dimming element20 Feb 2024US 11,905,417 B2Nippon Kayaku Kabushiki Kaisha
- Anthraquinone compound, liquid crystal composition containing said compound, and dimming element2 Oct 2025US 2025/0304531 A1Nippon Kayaku Kabushiki Kaisha
- Multimeric dye materials and devices using them5 Dec 2024US 2024/0400834 A1
- Anthraquinone compound, liquid crystal composition containing said compound, and dimming element9 May 2024US 2024/0150657 A1Nippon Kayaku Kabushiki Kaisha
- Anthraquinone compound, liquid crystal composition containing said compound, and dimming element2 May 2024US 2024/0140907 A1Nippon Kayaku Kabushiki Kaisha
- Anthraquinone Compound, Liquid Crystal Composition For Dimming Including Said Compound, And Dimming Element26 Oct 2023US 2023/0340268 A1Nippon Kayaku Kabushiki Kaisha
Most cited
By later US patents
- Liquid crystals having pleochroic dyes41US 4,363,743 ASiemens Aktiengesellschaft · 1982
- Color filter grade photosensitive resin coloring composition and color filter using the same35US 5,968,688 ANippon Shokubai Co., Ltd. · 1999
- Liquid crystal compositions including pleochroic dye33US 4,232,950 AMinnesota Mining and Manufacturing Company · 1980
- Liquid crystal compositions containing pleochroic dye24US 4,232,949 AMinnesota Mining and Manufacturing Company · 1980
- Method for preparing light-absorbing polymeric compositions23US 6,197,223 B1Eastman Chemical Company · 2001