C09B 43/12
Preparation of azo dyes from other azo compounds: by acylation of amino
Official title: by acylation of amino groups
C09B43/12 (Preparation of azo dyes from other azo compounds: by acylation of amino) appears on 184 US grants and 65 published applications in this corpus.
Search patents in C09B- Granted patents
- 184
- Published applications
- 65
- Assignees
- 51
- Inventors
- 270
- Latest grant
- 30 Jul 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 10 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 9 | 0 |
| 1998 | 11 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 1 |
| 2002 | 9 | 2 |
| 2003 | 7 | 4 |
| 2004 | 2 | 7 |
| 2005 | 2 | 6 |
| 2006 | 8 | 5 |
| 2007 | 2 | 3 |
| 2008 | 4 | 2 |
| 2009 | 2 | 7 |
| 2010 | 3 | 7 |
| 2011 | 4 | 5 |
| 2012 | 1 | 5 |
| 2013 | 6 | 3 |
| 2014 | 3 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 2 | 1 |
| 2018 | 2 | 2 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Compound and structural body for detecting hydrogen sulfide30 Jul 2024US 12,049,469 B2Canon Kabushiki Kaisha
- Water-soluble azo compound or salt thereof, ink and recording medium29 Nov 2022US 11,512,203 B2Nippon Kayaku Kabushiki Kaisha
- Pigment dispersion liquid and inkjet ink21 Jan 2020US 10,538,670 B2FUJIFILM Corporation
- Bis(azobenzene) diamines and photomechanical polymers made therefrom28 May 2019US 10,301,430 B2The United States of America as represented by the Secretary of the Air Force
- Dye-based polarizer as well as polarizing plate and liquid crystal display device using the polarizer26 Jun 2018US 10,007,142 B2Nippon Kayaku Kabushiki Kaisha
- Novel compound and structural body for detecting hydrogen sulfide26 May 2022US 2022/0162226 A1Canon Kabushiki Kaisha
- Water-soluble azo compound or salt thereof, ink and recording medium23 Sep 2021US 2021/0292566 A1Nippon Kayaku Kabushiki Kaisha
- Pigment dispersion liquid and inkjet ink23 May 2019US 2019/0153231 A1FUJIFILM Corporation
- Dye-based polarizer as well as polarizing plate and liquid crystal display device using the polarizer15 Mar 2018US 2018/0074371 A1Nippon Kayaku Kabushiki Kaisha
- Bis(azobenzene) diamines and photomechanical polymers made therefrom25 Jan 2018US 2018/0022872 A1Government of the United States as Represented by the Secretary of the Air Force
Most cited
By later US patents
- Cationic imidazole azo dyes292US 5,708,151 ACiba Specialty Chemicals Corporation · 1998
- Aqueous ink composition for ink-jet recording98US 4,737,190 ARicoh Company, Ltd. · 1988
- Aqueous ink composition81US 4,711,668 ARicoh Company, Ltd. · 1987
- Aqueous ink composition for ink jet-recording78US 4,647,310 ARicoh Company, Ltd. · 1987
- Aqueous ink composition61US 4,605,442 ATaoka Chemical Co., Ltd. · 1986