C09B 26/02
Hydrazone dyes
Official title: Hydrazone dyes (hydrazone-azo dyes C09B56/18)
C09B26/02 (Hydrazone dyes) appears on 126 US grants and 53 published applications in this corpus.
Search patents in C09B- Granted patents
- 126
- Published applications
- 53
- Assignees
- 51
- Inventors
- 224
- Latest grant
- 2 Mar 2021
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 | 4 | 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 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 2 | 5 |
| 2006 | 4 | 2 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 4 |
| 2010 | 2 | 11 |
| 2011 | 4 | 1 |
| 2012 | 4 | 2 |
| 2013 | 5 | 4 |
| 2014 | 1 | 4 |
| 2015 | 4 | 3 |
| 2016 | 0 | 5 |
| 2017 | 3 | 3 |
| 2018 | 3 | 2 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Aie luminogens for visualization and treatment of cancer2 Mar 2021US 10,935,552 B2The Hong Kong University of Science and Technology
- Method for making Schiff base23 Oct 2018US 10,106,684 B2King Fahd University of Petroleum and Minerals
- Fluorescent schiff base conjugate Cu(II) chemosensors and methods thereof12 Jun 2018US 9,994,713 B2King Fahd University of Petroleum and Minerals
- Acid perspiration resistant fluorescent compounds for treating hair17 Apr 2018US 9,943,472 B2Noxell Corporation
- Organic dyes comprising a hydrazone moiety and their use in dye-sensitized solar cells28 Nov 2017US 9,831,042 B2BASF SE
- 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.
- Methods to formulate neutral organic compounds with polymer nanoparticles20 Aug 2020US 2020/0260724 A1Vive Crop Protection Inc.
- Method for making schiff base12 Jul 2018US 2018/0194944 A1King Fahd University of Petroleum and Minerals
- Aie luminogens for visualization and treatment of cancer7 Jun 2018US 2018/0156811 A1The Hong Kong University of Science and Technology
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
- Photoconductor for electrophotography containing hydrazone18US 4,985,325 AFuji Electric Co., Ltd. · 1991