C09B 11/18
Preparation by oxidation
C09B11/18 (Preparation by oxidation) appears on 18 US grants and 9 published applications in this corpus.
Search patents in C09B- Granted patents
- 18
- Published applications
- 9
- Assignees
- 14
- Inventors
- 42
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 3 |
| 2009 | 3 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for the preparation of diarylmethane dyes and triarylmethane dyes including isosulfan blue22 Sep 2026US 12,741,934 B2Nj Bio, Inc.
- Compound, ink, resist composition for color filter, sheet for heat-sensitive transfer recording, and toner30 Apr 2024US 11,970,438 B2Canon Kabushiki Kaisha
- Process for the preparation of isosulfan blue10 Dec 2019US 10,501,629 B2Dishman Carbogen Amcis Limited
- Unsubstituted and polymeric fluoran colorants for coloring consumer products29 Dec 2009US 7,637,963 B2Milliken & Company
- Unsubstituted and polymeric triphenymethane colorants for coloring consumer products6 Oct 2009US 7,597,723 B2Milliken & Company
- Method for the preparation of diarylmethane dyes and triarylmethane dyes including isosulfan blue15 Sep 2022US 2022/0289671 A1Nj Biopharmaceuticals LLC
- Compound, ink, resist composition for color filter, sheet for heat-sensitive transfer recording, and toner29 Jul 2021US 2021/0230109 A1Canon Kabushiki Kaisha
- An improved process for the preparation of isosulfan blue10 Jan 2019US 2019/0010330 A1Dishman Pharmaceuticals and Chemicals Limited
- Triphenylmethane-based colored composition6 Jul 2017US 2017/0190818 A1Wako Pure Chemical Industries, Ltd.
- Unsubstituted and polymeric lactone colorants for coloring consumer products21 Aug 2008US 2008/0196176 A1Milliken & Company
Most cited
By later US patents
- Process for the preparation of sulpho-free triphenyl-methane dyestuffs18US 5,013,857 ABayer Aktiengesellschaft · 1991
- Unsubstituted and polymeric lactone colorants for coloring consumer products17US 7,544,216 B2Milliken & Company · 2009
- Unsubstituted and polymeric fluoran colorants for coloring consumer products17US 7,637,963 B2Milliken & Company · 2009
- Unsubstituted and polymeric triphenymethane colorants for coloring consumer products16US 7,597,723 B2Milliken & Company · 2009
- Preparation of Di- or triarylmethane dyes by oxidation11US 5,659,053 ABASF SE · 1997