C09B 45/00
Complex metal compounds of azo dyes
C09B45/00 (Complex metal compounds of azo dyes) appears on 447 US grants and 194 published applications in this corpus.
Search patents in C09B- Granted patents
- 447
- Published applications
- 194
- Assignees
- 122
- Inventors
- 700
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 28 | 0 |
| 1978 | 27 | 0 |
| 1979 | 17 | 0 |
| 1980 | 13 | 0 |
| 1981 | 15 | 0 |
| 1982 | 11 | 0 |
| 1983 | 11 | 0 |
| 1984 | 16 | 0 |
| 1985 | 19 | 0 |
| 1986 | 15 | 0 |
| 1987 | 12 | 0 |
| 1988 | 5 | 0 |
| 1989 | 12 | 0 |
| 1990 | 10 | 0 |
| 1991 | 11 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 9 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 12 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 3 |
| 2002 | 5 | 10 |
| 2003 | 8 | 11 |
| 2004 | 15 | 14 |
| 2005 | 6 | 20 |
| 2006 | 18 | 19 |
| 2007 | 9 | 15 |
| 2008 | 6 | 9 |
| 2009 | 5 | 13 |
| 2010 | 3 | 14 |
| 2011 | 6 | 11 |
| 2012 | 7 | 5 |
| 2013 | 7 | 2 |
| 2014 | 3 | 10 |
| 2015 | 10 | 3 |
| 2016 | 0 | 5 |
| 2017 | 4 | 8 |
| 2018 | 7 | 3 |
| 2019 | 6 | 2 |
| 2020 | 2 | 5 |
| 2021 | 2 | 2 |
| 2022 | 2 | 3 |
| 2023 | 3 | 1 |
| 2024 | 3 | 2 |
| 2025 | 1 | 4 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C09B 45/02Preparation from dyes containing in o-position a hydroxy group and in o'-position344
- C09B 45/01Complex metal compounds of azo dyes: characterised by the method of metallisation21
- C09B 45/48Preparation from other complex metal compounds of azo dyes19
- C09B 45/34Preparation from o-monohydroxy azo compounds having in the o'-position an atom or13
- C09B 45/38Preparation from compounds with —oh and —cooh adjacent in the same ring6
Recent patents
- Pigment and method for producing same, solution, metal hydroxyl amount evaluation method, and metal hydroxyl processing rate evaluation method1 Sep 2026US 12,723,158 B2Kyoto University
- Azo iron complex dye, ink composition containing same, and method for producing azo iron complex dye12 Aug 2025US 12,384,920 B2Orient Chemical Industries, Ltd.
- Pigment preparations10 Dec 2024US 12,163,031 B2LANXESS Deutschland GmbH
- Composition for aqueous ink jet7 May 2024US 11,976,204 B2Seiko Epson Corporation
- Compound, composition, film, laminate, and display device12 Mar 2024US 11,926,575 B2Sumitomo Chemical Company, Limited
- Pigment dispersion for aqueous cosmetic compositions, and aqueous cosmetic composition using the same4 Sep 2025US 2025/0277115 A1Mitsubishi Pencil Company, Limited
- Pigment and method for producing same, solution, metal hydroxyl amount evaluation method, and metal hydroxyl processing rate evaluation method27 Mar 2025US 2025/0101231 A1Kyoto University
- Pigment preparations13 Mar 2025US 2025/0084251 A1LANXESS Deutschland GmbH
- Optical film, composition for forming colored layer, dipyrromethene cobalt complex and display device13 Mar 2025US 2025/0089549 A1Toppan Holdings Inc.
- Azo iron complex dye, ink composition containing same, and method for producing azo iron complex dye12 Dec 2024US 2024/0409746 A1Orient Chemical Industries, Ltd.
Most cited
By later US patents
- Azo-metal complex dye and method for producing the same and its use for a high density optical disc recording medium46US 6,534,636 B2Industrial Technology Research Institute · 2003
- Magenta dyes for ink-jet inks44US 5,980,622 AHewlett-Packard Company · 1999
- Two-component dry-type developer27US 4,562,136 ARicoh Company, Ltd. · 1985
- Derivatives of azobarbituric acid or salts or complexes thereof27US 4,628,082 ABayer Aktiengesellschaft · 1986
- Photographic material containing sulphonic acid group containing disazo dyestuffs25US 4,118,232 ACiba-Geigy Corporation · 1978