C09B 35/00
Disazo and polyazo dyes of the type a<-d->b prepared by diazotising and
Official title: Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
C09B35/00 (Disazo and polyazo dyes of the type a<-d->b prepared by diazotising and) appears on 578 US grants and 147 published applications in this corpus.
Search patents in C09B- Granted patents
- 578
- Published applications
- 147
- Assignees
- 151
- Inventors
- 871
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 26 | 0 |
| 1978 | 18 | 0 |
| 1979 | 16 | 0 |
| 1980 | 10 | 0 |
| 1981 | 27 | 0 |
| 1982 | 15 | 0 |
| 1983 | 18 | 0 |
| 1984 | 21 | 0 |
| 1985 | 21 | 0 |
| 1986 | 29 | 0 |
| 1987 | 20 | 0 |
| 1988 | 20 | 0 |
| 1989 | 23 | 0 |
| 1990 | 22 | 0 |
| 1991 | 27 | 0 |
| 1992 | 17 | 0 |
| 1993 | 14 | 0 |
| 1994 | 20 | 0 |
| 1995 | 16 | 0 |
| 1996 | 16 | 0 |
| 1997 | 7 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 16 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 3 |
| 2004 | 2 | 9 |
| 2005 | 5 | 5 |
| 2006 | 6 | 14 |
| 2007 | 4 | 7 |
| 2008 | 5 | 11 |
| 2009 | 7 | 14 |
| 2010 | 13 | 8 |
| 2011 | 9 | 7 |
| 2012 | 3 | 2 |
| 2013 | 6 | 5 |
| 2014 | 7 | 8 |
| 2015 | 7 | 7 |
| 2016 | 2 | 15 |
| 2017 | 8 | 4 |
| 2018 | 5 | 6 |
| 2019 | 9 | 9 |
| 2020 | 4 | 1 |
| 2021 | 4 | 2 |
| 2022 | 4 | 1 |
| 2023 | 1 | 2 |
| 2024 | 1 | 5 |
| 2025 | 2 | 0 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09B 35/02Disazo dyes424
- C09B 35/50Tetrazo dyes74
- C09B 35/38Trisazo dyes ot the type [image cpc-sch-c09b-1018.gif]54
- C09B 35/378Trisazo dyes of the type [image cpc-sch-c09b-1017.gif]37
- C09B 35/35Trisazo dyes in which the tetrazo component is a diamino-azo-aryl compound34
- C09B 35/36Trisazo dyes of the type [image cpc-sch-c09b-1016.gif]17
- C09B 35/64Higher polyazo dyes16
Recent patents
- Ink composition for ink jet printing15 Sep 2026US 12,735,591 B2Seiko Epson Corporation
- Disazo pigment, pigment composition, and printing ink14 Jul 2026US 12,679,977 B2DIC Corporation
- Azo pigment, ink, paint, colorant for plastics, colored molded article, colorant for stationery and writing materials, printing agent, toner, dispersion and resist for color filters, and cosmetic material21 Apr 2026US 12,606,717 B2DIC Corporation
- Method for preparing a stable Trypan Blue solution24 Feb 2026US 12,559,629 B2Beckman Coulter, Inc.
- Optical sheet and optical component14 Oct 2025US 12,442,954 B2Sumitomo Bakelite Co., Ltd.
- Pigments and related methods10 Sep 2026US 2026/0265528 A1Kebotix, Inc.
- Ink Composition For Ink Jet Printing9 May 2024US 2024/0150601 A1Seiko Epson Corporation
- Light absorption anisotropic layer, laminate, and infrared light sensor system2 May 2024US 2024/0142682 A1FUJIFILM Corporation
- Azo pigment, ink, paint, colorant for plastics, colored molded article, colorant for stationery and writing materials, printing agent, toner, dispersion and resist for color filters, and cosmetic material14 Mar 2024US 2024/0084155 A1DIC Corporation
- Compositions and methods for stable trypan blue solutions22 Feb 2024US 2024/0059898 A1Beckman Coulter, Inc.
Most cited
By later US patents
- Dimeric azo pyridone colorants103US 6,713,614 B2Xerox Corporation · 2004
- Electrophotographic plate comprising a conductive substrate and a photosensitive layer containing an organic photoconductor layer composed of a hydrazone compound98US 4,278,747 AMitsubishi Chemical Industries Limited · 1981
- Processes for preparing dianthranilate compounds and diazopyridone colorants95US 6,576,747 B1Xerox Corporation · 2003
- Method for making dimeric azo pyridone colorants95US 6,576,748 B1Xerox Corporation · 2003
- Colorant compounds84US 7,381,831 B1Xerox Corporation · 2008