C09B 3/30
Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus
C09B3/30 (Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus) appears on 13 US grants and 2 published applications in this corpus.
Search patents in C09B- Granted patents
- 13
- Published applications
- 2
- Assignees
- 5
- Inventors
- 17
- Latest grant
- 26 Mar 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method for chlorinating blue anthrone, violanthrone or isoviolantrone26 Mar 2024US 11,939,475 B2
- Chemiluminescent materials and method of making same7 Aug 2018US 10,040,993 B1The United States of America as represented by the Secretary of the Air Force
- Fluorescent dyes10 Apr 2001US 6,215,008 B1Rohm and Haas Company
- Preparation of chlorinated violanthrones or isoviolanthrones10 Sep 1996US 5,554,774 ABASF SE
- Vat dyes9 Apr 1996US 5,505,743 ABASF SE
Most cited
By later US patents
- Concentration of light over a particular area and novel fluorescent compounds13US 4,486,587 ABASF SE · 1984
- Chemiluminescent materials and method of making same7US 10,040,993 B1The United States of America as represented by the Secretary of the Air Force · 2018
- Fluorescent dyes5US 6,215,008 B1Rohm and Haas Company · 2001
- Vat dyes obtainable by bromination of dibenzanthrone and reaction with 1-aminoanthraquinone3US 4,547,575 ACiba-Geigy Corporation · 1985
- Process for the production of alkoxy-substituted polycyclic aromatic compounds2US 4,198,529 ACiba-Geigy Corporation · 1980