C09B 23/166
Containing two or more nitrogen atoms
Official title: {containing two or more nitrogen atoms (hydrazon dyes -CH=N-N- C09B26/02)}
C09B23/166 (Containing two or more nitrogen atoms) appears on 48 US grants and 38 published applications in this corpus.
Search patents in C09B- Granted patents
- 48
- Published applications
- 38
- Assignees
- 30
- Inventors
- 99
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 3 |
| 2015 | 3 | 1 |
| 2016 | 2 | 3 |
| 2017 | 2 | 5 |
| 2018 | 0 | 3 |
| 2019 | 4 | 4 |
| 2020 | 3 | 3 |
| 2021 | 3 | 1 |
| 2022 | 1 | 3 |
| 2023 | 3 | 2 |
| 2024 | 1 | 1 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wavelength selective absorption filter and organic electroluminescent display device25 Nov 2025US 12,479,989 B2FUJIFILM Corporation
- Optical filter and imaging device28 Oct 2025US 12,454,619 B2AGC Inc.
- Optical filter and imaging device28 May 2024US 11,993,718 B2AGC Inc.
- CA IX-NIR dyes and their uses17 Jan 2023US 11,555,821 B2On Target Laboratories, LLC
- Methods of using nucleotide analogues10 Jan 2023US 11,548,909 B2IsoPlexis Corporation
- Optical filter and imaging device15 Jan 2026US 2026/0015507 A1AGC Inc.
- Photosensitive composition, hologram recording medium, hologram optical element, optical device, and electronic device4 Dec 2025US 2025/0370407 A1Sony Group Corporation
- Wavelength selective absorption filter and organic electroluminescent display device13 Nov 2025US 2025/0346750 A1FUJIFILM Corporation
- Optical filter and imaging device29 Aug 2024US 2024/0287312 A1AGC Inc.
- Ca ix - nir dyes and their uses12 Oct 2023US 2023/0320564 A1On Target Laboratories, LLC
Most cited
By later US patents
- Diazamerocyanines for dyeing keratinous fibers58US 3,985,499 AL'oreal · 1976
- Electrophotographic photosensitive member with hydrazone compound52US 4,399,207 ACanon Kabushiki Kaisha · 1983
- Diazomerocyanines and mesomeric forms thereof49US 4,151,162 AL'oreal · 1979
- Methods of using nucleotide analogues21US 10,273,539 B2Qiagen Sciences, LLC · 2019
- Methods for synthesizing nucleotide analogues with disulfide linkers19US 10,336,785 B2Qiagen Sciences, LLC · 2019