C09B 43/18
Preparation of azo dyes from other azo compounds: by acylation of hydroxyl
Official title: by acylation of hydroxyl group {or of mercapto group; (OPO3H2 and OP(X)(XR)2 with X=O,S,NH and R being hydrocarbon, C09B69/007)}
C09B43/18 (Preparation of azo dyes from other azo compounds: by acylation of hydroxyl) appears on 70 US grants and 19 published applications in this corpus.
Search patents in C09B- Granted patents
- 70
- Published applications
- 19
- Assignees
- 41
- Inventors
- 132
- Latest grant
- 13 Jul 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 8 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 8 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 4 |
| 2006 | 4 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 1 |
| 2011 | 0 | 2 |
| 2012 | 2 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 2 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Multistage colored polymer particle and skin care formulations comprising same13 Jul 2021US 11,058,612 B2Rohm and Haas Company
- Leuco colorants as bluing agents in laundry care composition21 Jul 2020US 10,717,950 B2The Procter & Gamble Company
- Benzothiazol-2-ylazo-phenyl compound as dye, compositions including the dye, and method of determining degree of cure of such compositions26 Sep 2017US 9,772,321 B23M Innovative Properties Company
- Thiophene azo carboxylate dyes and laundry care compositions containing the same14 Feb 2017US 9,567,465 B2Milliken & Company
- Thiophene azo carboxylate dyes and laundry care compositions containing the same20 Oct 2015US 9,163,146 B2Milliken & Company
- Multistage colored polymer particle and skin care formulations comprising same8 Oct 2020US 2020/0315928 A1Rohm and Haas Company
- Leuco colorants as bluing agents in laundry care composition18 Apr 2019US 2019/0112558 A1The Procter & Gamble Company
- Benzothiazol-2-ylazo-phenyl compound as dye, compositions including the dye, and method of determining degree of cure of such compositions11 Feb 2016US 2016/0041143 A13M Innovative Properties Company
- Thiophene Azo Carboxylate Dyes and Laundry Care Compositions Containing the Same24 Dec 2015US 2015/0368472 A1Milliken & Company
- Disulfide dyes12 Jun 2014US 2014/0157529 A1BASF SE
Most cited
By later US patents
- Diagnostic agents for the detection of leukocytes in body fluids50US 4,299,917 ABoehringer Manneheim GmbH · 1981
- Liquid crystals having pleochroic dyes41US 4,363,743 ASiemens Aktiengesellschaft · 1982
- Visible light absorbers for ophthalmic lens materials26US 8,207,244 B2Novartis AG · 2012
- Azo dyes having 2,6-diaminopyridine derivatives as coupling components25US 4,042,578 ABadische Anilin- & Soda-Fabrik Aktiengesellschaft · 1977
- Novel yellow azo dyes and dichroic liquid crystal compositions made therewith15US 4,308,161 AGeneral Electric Company · 1981