C09B 56/02
Azomethine-azo dyes
Official title: Azomethine-azo dyes {(1,2-Complex dyes of AZOMETHINE and AZO dyes, C09B55/001)}
C09B56/02 (Azomethine-azo dyes) appears on 33 US grants and 11 published applications in this corpus.
Search patents in C09B- Granted patents
- 33
- Published applications
- 11
- Assignees
- 15
- Inventors
- 71
- Latest grant
- 22 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 3 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 2 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Dichroic azo-azomethine dyes for liquid crystal compositions22 Oct 2024US 12,122,919 B2BASF SE
- Coloring composition, film, color filter, solid-state imaging element, and image display device5 Sep 2023US 11,746,239 B2FUJIFILM Corporation
- Black azo pigment and colorant9 Jul 2019US 10,344,166 B2Dainichiseika Color & Chemicals Mfg. Co., Ltd.
- Coloring composition, anisotropic light absorption film, laminate, polarizing plate, image display device and compound7 May 2019US 10,280,181 B2FUJIFILM Corporation
- Polarizing film, display device and production process thereof14 Aug 2018US 10,047,294 B2FUJIFILM Corporation
- Dichroic azo-azomethine dyes for liquid crystal compositions31 Mar 2022US 2022/0098412 A1BASF SE
- Coloring composition, film, color filter, solid-state imaging element, and image display device2 Jul 2020US 2020/0207990 A1FUJIFILM Corporation
- Black azo pigment and colorant14 Feb 2019US 2019/0048195 A1Dainichiseika Color & Chemicals Mfg. Co., Ltd.
- Coloring composition, anisotropic light absorption film, laminate, polarizing plate, image display device and compound24 Nov 2016US 2016/0340367 A1FUJIFILM Corporation
- Near infrared-reflecting/transmitting azo pigment, method for manufacturing near infrared-reflecting/transmittingazo pigment, colorant composition using said azo pigments, item-coloring method and colored item17 Nov 2016US 2016/0333202 A1Dainichiseika Color & Chemicals Mfg. Co., Ltd.
Most cited
By later US patents
- Metal complexes of bis-azomethines from hydroxy-aldehydes and alkylene diamines19US 4,044,036 ACiba-Geigy Corporation · 1977
- Liquid crystal display device10US 4,400,059 AHitachi, Ltd. · 1983
- Electrophotographic element containing disazo pigment charge generating material9US 4,327,168 ARicoh Company, Ltd. · 1982
- Photoconductor for electrophotography8US 5,132,189 AFuji Electric Co., Ltd. · 1992
- Novel liquid crystal dyestuffs and electro-optic devices incorporating same7US 4,184,750 ARCA Corporation · 1980