C09B 33/02
Disazo dyes
C09B33/02 (Disazo dyes) appears on 219 US grants and 113 published applications in this corpus.
Search patents in C09B- Granted patents
- 219
- Published applications
- 113
- Assignees
- 78
- Inventors
- 443
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 16 | 0 |
| 1978 | 11 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 6 | 0 |
| 1984 | 2 | 0 |
| 1985 | 10 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 3 |
| 2003 | 3 | 3 |
| 2004 | 2 | 5 |
| 2005 | 5 | 3 |
| 2006 | 3 | 6 |
| 2007 | 3 | 3 |
| 2008 | 3 | 4 |
| 2009 | 4 | 9 |
| 2010 | 2 | 4 |
| 2011 | 4 | 11 |
| 2012 | 12 | 12 |
| 2013 | 11 | 4 |
| 2014 | 4 | 9 |
| 2015 | 7 | 7 |
| 2016 | 6 | 6 |
| 2017 | 5 | 5 |
| 2018 | 4 | 4 |
| 2019 | 7 | 4 |
| 2020 | 1 | 3 |
| 2021 | 1 | 1 |
| 2022 | 2 | 1 |
| 2023 | 0 | 2 |
| 2024 | 2 | 1 |
| 2025 | 2 | 0 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09B 33/12In which the coupling component is a heterocyclic compound61
- C09B 33/153In which the coupling component is a bis- or a bis-50
- C09B 33/04In which the coupling component is a dihydroxy or polyhydroxy compound38
- C09B 33/08In which the coupling component is a hydroxy-amino compound24
- C09B 33/147In which the coupling component is a bis -24
- C09B 33/06In which the coupling component is a diamine or polyamine8
- C09B 33/16From other coupling components8
Recent patents
- Optical sheet and optical component14 Oct 2025US 12,442,954 B2Sumitomo Bakelite Co., Ltd.
- Compound, tautomer of compound or salt of compound or tautomer, method for producing same, coloring composition, dyeing method, and dyed article4 Mar 2025US 12,240,842 B2FUJIFILM Corporation
- Reactive dyes and preparation methods thereof17 Sep 2024US 12,091,552 B2Nantong University
- Head-up display apparatus23 Apr 2024US 11,966,050 B2Nitto Denko Corporation
- Water-based ink for ink-jet recording6 Sep 2022US 11,434,386 B2Brother Kogyo Kabushiki Kaisha
- Alternative solvent systems and dye formulations10 Sep 2026US 2026/0265527 A1
- Pigments and related methods10 Sep 2026US 2026/0265528 A1Kebotix, Inc.
- Pigment compositions having a reduced content of aryl amines or n-arylacetoacetamides and oxidation methods for producing the same26 Feb 2026US 2026/0055276 A1Xerox Corporation
- Reactive dyes and preparation methods thereof14 Mar 2024US 2024/0084144 A1Nantong University
- Compound, tautomer of compound or salt of compound or tautomer, method for producing same, coloring composition, dyeing method, and dyed article3 Aug 2023US 2023/0242523 A1FUJIFILM Corporation
Most cited
By later US patents
- Dimeric azo pyridone colorants98US 6,646,111 B1Xerox Corporation · 2003
- Method for making dimeric azo pyridone colorants95US 6,576,748 B1Xerox Corporation · 2003
- Ink, ink jet recording method and azo compound92US 6,878,196 B2Fuji Photo Film Co., Ltd. · 2005
- AZO compound, and pigment dispersant, pigment composition, pigment dispersion and toner including the azo compound56US 8,377,616 B2Canon Kabushiki Kaisha · 2013
- azo compound, and pigment dispersant, pigment composition, pigment dispersion and toner including the AZO compound52US 8,628,899 B2Canon Kabushiki Kaisha · 2014