C09B 45/02
Preparation from dyes containing in o-position a hydroxy group and in o'-position
Official title: Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
C09B45/02 (Preparation from dyes containing in o-position a hydroxy group and in o'-position) appears on 344 US grants and 156 published applications in this corpus.
Search patents in C09B- Granted patents
- 344
- Published applications
- 156
- Assignees
- 100
- Inventors
- 552
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 19 | 0 |
| 1978 | 16 | 0 |
| 1979 | 11 | 0 |
| 1980 | 7 | 0 |
| 1981 | 9 | 0 |
| 1982 | 9 | 0 |
| 1983 | 7 | 0 |
| 1984 | 11 | 0 |
| 1985 | 17 | 0 |
| 1986 | 12 | 0 |
| 1987 | 10 | 0 |
| 1988 | 5 | 0 |
| 1989 | 12 | 0 |
| 1990 | 7 | 0 |
| 1991 | 9 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 12 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 3 |
| 2002 | 5 | 7 |
| 2003 | 8 | 9 |
| 2004 | 12 | 12 |
| 2005 | 6 | 17 |
| 2006 | 14 | 9 |
| 2007 | 6 | 15 |
| 2008 | 4 | 4 |
| 2009 | 5 | 10 |
| 2010 | 2 | 14 |
| 2011 | 5 | 11 |
| 2012 | 7 | 5 |
| 2013 | 5 | 0 |
| 2014 | 3 | 9 |
| 2015 | 8 | 1 |
| 2016 | 0 | 4 |
| 2017 | 2 | 7 |
| 2018 | 7 | 2 |
| 2019 | 5 | 2 |
| 2020 | 1 | 4 |
| 2021 | 2 | 2 |
| 2022 | 2 | 2 |
| 2023 | 2 | 1 |
| 2024 | 2 | 2 |
| 2025 | 1 | 4 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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.
- 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
- Adhesive composition, adhesive film, adhesive optical filter and display device31 Oct 2023US 11,802,209 B2LG Chem.Ltd.
- 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
- 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
- Anthraquinone compounds useful in photographic processes24US 4,110,355 APolaroid Corporation · 1978
- Water-soluble azo dyes and polarizing films using the dyes24US 5,318,856 AMitsui Toatsu Chemicals, Inc. · 1994