C09B 33/18
Trisazo or higher polyazo dyes
C09B33/18 (Trisazo or higher polyazo dyes) appears on 71 US grants and 54 published applications in this corpus.
Search patents in C09B- Granted patents
- 71
- Published applications
- 54
- Assignees
- 37
- Inventors
- 151
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 5 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 3 |
| 2005 | 0 | 0 |
| 2006 | 2 | 5 |
| 2007 | 4 | 5 |
| 2008 | 4 | 4 |
| 2009 | 2 | 2 |
| 2010 | 1 | 4 |
| 2011 | 1 | 5 |
| 2012 | 6 | 7 |
| 2013 | 6 | 3 |
| 2014 | 3 | 3 |
| 2015 | 0 | 2 |
| 2016 | 5 | 3 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- C09B 33/24Trisazo dyes of the type [image cpc-sch-c09b-1013.gif]28
- C09B 33/22Trisazo dyes of the type a->b->k<-c27
- C09B 33/28Tetrazo dyes of the type a->b->k<-c<-d15
- C09B 33/26Tetrazo dyes of the type a->b->c->k<-d6
- C09B 33/30Tetrazo dyes of the type [image cpc-sch-c09b-1014.gif]3
- C09B 33/32Tetrazo dyes of the type [image cpc-sch-c09b-1015.gif]0
Recent patents
- Aqueous additive solution for ink composition, aqueous colorant solution for ink composition, ink composition, ink composition for ink jet recording, and ink jet recording method2 Sep 2025US 12,404,417 B2FUJIFILM Corporation
- 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
- Electrowetting element15 Oct 2019US 10,444,489 B2Amazon Technologies, Inc.
- Black trisazo dyes, their preparation and their use16 Apr 2019US 10,259,942 B2DFI Chem GmbH
- Polarizing film, display device and production process thereof14 Aug 2018US 10,047,294 B2FUJIFILM Corporation
- Aqueous additive solution for ink composition, aqueous colorant solution for ink composition, ink composition, ink composition for ink jet recording, and ink jet recording method18 Jan 2024US 2024/0018376 A1FUJIFILM Corporation
- 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
- Trisazo Compounds for Ink-jet Printing28 Jul 2022US 2022/0235000 A1LANXESS Deutschland GmbH
- Coloring compound, yellow toner, ink, thermal transfer recording sheet, and color filter resist composition3 May 2018US 2018/0118944 A1Canon Kabushiki Kaisha
- Black Trisazo Dyes, Their Preparation And Their Use23 Nov 2017US 2017/0335110 A1DFI Chem GmbH
Most cited
By later US patents
- Ink, and recording method making use of same30US 5,216,437 ACanon Kabushiki Kaisha · 1993
- Ink jet black ink, ink set, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus27US 7,198,665 B2Canon Kabushiki Kaisha · 2007
- Ink, and recording method making use of same26US 5,139,573 ACanon Kabushiki Kaisha · 1992
- Tetrakisazo compounds having two 1-hydroxy-3- or 4-sulfo-6- or 7-amino- or substituted amino-naphthalene coupling component radicals the amino or substituted amino groups of which are linked 1,3,5-triazine rings20US 4,670,547 ASandoz Ltd. · 1987
- Polyazo compound or salt thereof and dye-based polarization film containing the same17US 6,399,752 B1Sumitomo Chemical Company, Limited · 2002