C09B 43/32
Preparation of azo dyes from other azo compounds: by reacting carboxylic or
Official title: by reacting carboxylic or sulfonic groups, or derivatives thereof, with amines; by reacting keto-groups with amines
C09B43/32 (Preparation of azo dyes from other azo compounds: by reacting carboxylic or) appears on 52 US grants and 15 published applications in this corpus.
Search patents in C09B- Granted patents
- 52
- Published applications
- 15
- Assignees
- 27
- Inventors
- 87
- Latest grant
- 24 Dec 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 9 | 0 |
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 3 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 2 |
| 2017 | 1 | 2 |
| 2018 | 1 | 1 |
| 2019 | 3 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Dichroic dye compound, polarizing film, and uses thereof24 Dec 2019US 10,514,484 B2Sumitomo Chemical Company, Limited
- Electrowetting element15 Oct 2019US 10,444,489 B2Amazon Technologies, Inc.
- Coloring composition, anisotropic light absorption film, laminate, polarizing plate, image display device and compound7 May 2019US 10,280,181 B2FUJIFILM Corporation
- 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
- Colored pigment particles for electrophoretic displays19 Dec 2017US 9,846,345 B2Empire Technology Development LLC
- Dye-based polarizer as well as polarizing plate and liquid crystal display device using the polarizer15 Mar 2018US 2018/0074371 A1Nippon Kayaku Kabushiki Kaisha
- Dichroic dye compound, polarizing film, and uses thereof24 Aug 2017US 2017/0242169 A1Sumitomo Chemical Company, Limited
- Electrowetting element5 Jan 2017US 2017/0003497 A1Amazon Technologies, Inc.
- Coloring composition, anisotropic light absorption film, laminate, polarizing plate, image display device and compound24 Nov 2016US 2016/0340367 A1FUJIFILM Corporation
- Colored pigment particles for electrophoretic displays21 Jan 2016US 2016/0018716 A1Empire Technology Development LLC
Most cited
By later US patents
- Preparation of disazo condensation pigments in microreactors20US 6,437,104 B1Clariant GmbH · 2002
- Organic photoconductive toner materials14US 3,933,664 ACanon Kabushiki Kaisha · 1976
- Photoresist composition for use in color filters10US 5,731,110 ASumitomo Chemical Company, Limited · 1998
- Mono- and bis-hydrazone pigments8US 7,105,646 B2Sun Chemical Corporation · 2006
- Bis-(dialkoxycarbonylphenylazo)acetoacetamidoarylenes7US 3,997,521 ASandoz Ltd. · 1976