C07C 50/36
The quinoid structure being part of a condensed ring system having four
Official title: the quinoid structure being part of a condensed ring system having four or more rings
C07C50/36 (The quinoid structure being part of a condensed ring system having four) appears on 32 US grants and 9 published applications in this corpus.
Search patents in C07C- Granted patents
- 32
- Published applications
- 9
- Assignees
- 24
- Inventors
- 85
- Latest grant
- 22 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 2 | 2 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Iron catalyzed highly enantioselective cis-dihydroxylation of quinones22 Apr 2025US 12,281,065 B2Laboratory for Synthetic Chemistry and Chemical Biology Limited
- Monosubstituted or polysubstituted amphiphilic hypocrellin derivative, and preparation method and application thereof26 Oct 2021US 11,154,548 B2Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences
- Photodynamic diagnosis, formulations usable as photosensitizers for this purpose, method for the production and use thereof3 Oct 2017US 9,775,900 B2Sanochemia Pharmazeutika AG
- Photodynamic diagnosis, formulations usable as photosensitizers for this purpose, method for the production and use thereof25 Apr 2017US 9,629,932 B2Sanochemia Pharmazeutika AG
- Fused ring indeno compounds for preparation of photochromic compounds12 May 2015US 9,029,565 B1Transitions Optical, Inc.
- Iron catalyzed highly enantioselective cis-dihydroxylation of quinones20 Jul 2023US 2023/0227393 A1Laboratory for Synthetic Chemistry and Chemical Biology Limited
- Monosubstituted or polysubstituted amphiphilic hypocrellin derivative, and preparation method and application thereof29 Nov 2018US 2018/0338965 A1Technical Institute of Physics and Chemistry of the Chinese Academy of Sciences
- Photodynamic diagnosis, formulations usable as photosensitizers for this purpose, method for the production and use thereof13 Jul 2017US 2017/0196976 A1Sanochemia Pharmazeutika AG
- Photodynamic diagnosis, formulations usable as photosensitizers for this purpose, method for the production and use thereof30 Mar 2017US 2017/0087256 A1Sanochemia Pharmazeutika AG
- Fused Ring Indeno Compounds For Preparation Of Photochromic Compounds21 May 2015US 2015/0141663 A1Transitions Optical, Inc.
Most cited
By later US patents
- Antiviral compositions26US 4,898,891 AYeda Research and Development Co. Ltd. · 1990
- Triptycene polymers and copolymers23US 6,605,693 B1Covion Organic Semiconductors GmbH · 2003
- Photochromic naphthacenequinones, process for their preparation and the use thereof17US 5,407,885 ACiba-Geigy Corporation · 1995
- Photochromic naphthacenequinones, process for their preparation and the use thereof15US 5,208,354 ACiba-Geigy Corporation · 1993
- Steffimycinone, 7-deoxysteffimycinone and derivatives10US 3,976,667 AThe Upjohn Company · 1976