C09B 1/20
Preparation from starting materials already containing the anthracene nucleus
C09B1/20 (Preparation from starting materials already containing the anthracene nucleus) appears on 390 US grants and 115 published applications in this corpus.
Search patents in C09B- Granted patents
- 390
- Published applications
- 115
- Assignees
- 142
- Inventors
- 751
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 34 | 0 |
| 1977 | 21 | 0 |
| 1978 | 31 | 0 |
| 1979 | 18 | 0 |
| 1980 | 19 | 0 |
| 1981 | 25 | 0 |
| 1982 | 17 | 0 |
| 1983 | 18 | 0 |
| 1984 | 9 | 0 |
| 1985 | 16 | 0 |
| 1986 | 9 | 0 |
| 1987 | 12 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 3 | 0 |
| 1991 | 11 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 8 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 4 |
| 2002 | 4 | 2 |
| 2003 | 7 | 5 |
| 2004 | 4 | 11 |
| 2005 | 4 | 5 |
| 2006 | 3 | 4 |
| 2007 | 4 | 5 |
| 2008 | 4 | 3 |
| 2009 | 6 | 7 |
| 2010 | 4 | 1 |
| 2011 | 1 | 6 |
| 2012 | 3 | 3 |
| 2013 | 3 | 6 |
| 2014 | 5 | 7 |
| 2015 | 7 | 10 |
| 2016 | 3 | 5 |
| 2017 | 3 | 5 |
| 2018 | 4 | 4 |
| 2019 | 6 | 7 |
| 2020 | 2 | 5 |
| 2021 | 2 | 2 |
| 2022 | 2 | 2 |
| 2023 | 1 | 2 |
| 2024 | 4 | 2 |
| 2025 | 3 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09B 1/26Dyes with amino groups substituted by hydrocarbon radicals215
- C09B 1/36Dyes with acylated amino groups60
- C09B 1/22Dyes with unsubstituted amino groups50
- C09B 1/207Dyes with amino groups and with onium groups25
- C09B 1/201Dyes with no other substituents than the amino groups14
- C09B 1/48Anthrimides12
- C09B 1/205Dyes with an unsaturated c on the n atom attached to the11
- C09B 1/206Dyes with amino groups substituted by heterocyclic radicals2
All 10 subgroupsShow fewer
Recent patents
- One-way circularly polarized light generated by propagation through Ch-GLC films doped with light-absorbing dyes4 Nov 2025US 12,461,297 B2University of Rochester
- Colorant solvent system, methods of use, and articles11 Mar 2025US 12,247,127 B2NIKE, Inc.
- Fluorescent dye oil tracer compositions7 Jan 2025US 12,188,350 B2Saudi Arabian Oil Company
- Contact lens10 Dec 2024US 12,164,182 B2CooperVision International Limited
- Coloring compound and thermal transfer recording sheet16 Apr 2024US 11,958,978 B2Canon Kabuskiki Kaisha
- Disperse dyes for dyeing polyester fibres8 Oct 2026US 2026/0308841 A1University of Leeds
- Fluorescent dye oil tracer compositions13 Mar 2025US 2025/0084759 A1Saudi Arabian Oil Company
- Multimeric dye materials and devices using them5 Dec 2024US 2024/0400834 A1
- Colorant solvent system, methods of use, and articles29 Feb 2024US 2024/0067826 A1NIKE, Inc.
- Fluorescent dye oil tracer compositions14 Dec 2023US 2023/0399942 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Polymerizable dye55US 5,055,602 ABausch & Lomb Incorporated · 1991
- Polyesters colored with the residue of heat stable anthraquinone compounds50US 4,999,418 AEastman Kodak Company · 1991
- Electro-optical display element45US 3,960,751 AMatsushita Electric Industrial Co., Ltd. · 1976
- Polymerizable dye45US 4,997,897 ABausch & Lomb Incorporated · 1991
- Ester capped alkyleneoxy fugitive tints and method for producing same43US 4,167,510 AMilliken Research Corporation · 1979