C09B 26/00
Hydrazone dyes
Official title: Hydrazone dyes; Triazene dyes
C09B26/00 (Hydrazone dyes) appears on 147 US grants and 65 published applications in this corpus.
Search patents in C09B- Granted patents
- 147
- Published applications
- 65
- Assignees
- 59
- Inventors
- 268
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 7 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 10 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 10 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 3 |
| 2005 | 2 | 5 |
| 2006 | 4 | 2 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 4 |
| 2010 | 2 | 11 |
| 2011 | 4 | 2 |
| 2012 | 5 | 2 |
| 2013 | 5 | 4 |
| 2014 | 1 | 4 |
| 2015 | 4 | 3 |
| 2016 | 1 | 7 |
| 2017 | 5 | 5 |
| 2018 | 5 | 3 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 2 | 3 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and kit for tie-dyeing24 Jun 2025US 12,338,576 B1Paisley Crafts, LLC
- Triazabutadienes as cleavable cross-linkers24 May 2022US 11,339,129 B2The Arizona Board of Regents on Behalf of the University of Arizon
- Leuco compounds1 Feb 2022US 11,236,235 B2Milliken & Company
- Aie luminogens for visualization and treatment of cancer2 Mar 2021US 10,935,552 B2The Hong Kong University of Science and Technology
- Pigment dispersion, method for manufacturing toner, aqueous ink, and triazo compound9 Jun 2020US 10,678,156 B2Canon Kabushiki Kaisha
- Light absorbers for ophthalmc lens materals and devices14 May 2026US 2026/0132236 A1Alcon Inc.
- Probes for fluorescence imaging11 Sep 2025US 2025/0283800 A1The General Hospital Corporation
- Protected triazabutadiene compositions for cellular studies in intact biological systems1 Sep 2022US 2022/0274931 A1Arizona Board of Regents on Behalf of the University of Arizona
- Methods to formulate neutral organic compounds with polymer nanoparticles7 Jul 2022US 2022/0211035 A1Vive Crop Protection Inc.
- Electrostatic ink composition13 Jan 2022US 2022/0011688 A1Hewlett-Packard Development Company, L. P.
Most cited
By later US patents
- Photosensitive member with hydrazone charge transport material67US 4,786,571 AMinolta Camera Kabushiki Kaisha · 1988
- Hydrazide compounds useful as co-developers for black-and-white photothermographic elements47US 5,496,695 AMinnesota Mining and Manufacturing Company · 1996
- Electrophotographic recording material having a julolidine hydrazone compound40US 5,128,227 AAgfa-Gevaert · 1992
- Structured organic films29US 8,093,347 B2Xerox Corporation · 2012
- Intraocular lenses with combinations of UV absorbers and blue light chromophores24US 8,262,948 B2Novartis AG · 2012