C07C 50/22
The quinoid structure being part of a condensed ring system containing four
Official title: the quinoid structure being part of a condensed ring system containing four or more rings
C07C50/22 (The quinoid structure being part of a condensed ring system containing four) appears on 7 US grants and 6 published applications in this corpus.
Search patents in C07C- Granted patents
- 7
- Published applications
- 6
- Assignees
- 5
- Inventors
- 11
- Latest grant
- 13 Dec 2005
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 1 |
| 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 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for preparing pentacene derivatives13 Dec 2005US 6,974,877 B23M Innovative Properties Company
- Triptycene analogs7 Dec 2004US 6,828,450 B2Kansas State University Research Foundation
- Cyclic compounds21 May 1985US 4,518,784 AHoffmann-La Roche Inc.
- Cyclic compounds7 May 1985US 4,515,969 AHoffmann-La Roche Inc.
- Process to produce anthracycline compounds11 Oct 1983US 4,409,391 AHoffmann-La Roche Inc.
- Process for the preparation of vitamin k2 and novel intermediates11 Apr 2024US 2024/0116843 A1Kappa Bioscience AS
- General method for functionalizing carbon nanotubes via solvent free diels-alder reactions2 Jun 2016US 2016/0152477 A1
- Process for preparing pentacene derivatives29 Dec 2005US 2005/0288522 A13M Innovative Properties Company
- Process for preparing pentacene derivatives29 May 2003US 2003/0100779 A13M Innovative Properties Company
- Process for preparing pentacene derivatives22 May 2003US 2003/0097010 A1
Most cited
By later US patents
- Cyclic compounds9US 4,316,985 AHoffmann-La Roche Inc. · 1982
- Triptycene analogs9US 6,828,450 B2Kansas State University Research Foundation · 2004
- Process for preparing pentacene derivatives9US 6,974,877 B23M Innovative Properties Company · 2005
- Process to produce hexahydronaphthacene derivatives7US 4,393,221 AHoffmann-La Roche Inc. · 1983
- Process to produce anthracycline compounds4US 4,409,391 AHoffmann-La Roche Inc. · 1983