C07C 309/38
Formed by at least three rings
Official title: formed by at least three rings
C07C309/38 (Formed by at least three rings) appears on 16 US grants and 17 published applications in this corpus.
Search patents in C07C- Granted patents
- 16
- Published applications
- 17
- Assignees
- 15
- Inventors
- 54
- Latest grant
- 4 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 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 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 4 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 2 | 2 |
| 2014 | 3 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Photoacid generator for chemically amplified photoresists4 Mar 2025US 12,242,190 B2International Business Machines Corporation
- Fluorenone/fluorenol derivatives for aqueous redox flow batteries28 Feb 2023US 11,591,294 B2Battelle Memorial Institute
- Molecular host frameworks and methods of making and using same26 Apr 2022US 11,312,681 B2New York University
- Compositions and methods and uses relating thereto1 Mar 2022US 11,261,389 B2Innospec Limited
- Resist composition and resist patterning process28 Sep 2021US 11,131,926 B2Shin-Etsu Chemical Co., Ltd.
- Photoacid generator for chemically amplified photoresists29 Sep 2022US 2022/0308448 A1International Business Machines Corporation
- Fluorenone/fluorenol derivatives for aqueous redox flow batteries20 May 2021US 2021/0147347 A1Battelle Memorial Institute
- Compositions and methods and uses relating thereto19 Nov 2020US 2020/0362255 A1Innospec Limited
- Molecular host frameworks and methods of making and using same12 Dec 2019US 2019/0375706 A1New York University
- Resist composition and resist patterning process10 Jan 2019US 2019/0010119 A1Shin-Etsu Chemical Co., Ltd.
Most cited
By later US patents
- Pyrenexulfonic acids useful in fluorescent lipid probes22US 4,844,841 A1989
- Actinic ray-sensitive or radiation-sensitive resin composition and method of forming pattern with the composition18US 8,900,791 B2FUJIFILM Corporation · 2014
- Polycyclic aromatic carbon based solid strong acid4US 7,335,790 B2Japan Science and Technology Agency · 2008
- Pyrenyloxysulfonic acid fluorescent agents3US 8,039,642 B2Life Technologies Corporation · 2011
- Pyrenyloxysulfonic acid fluorescent agents2US 8,268,886 B2Life Technologies Corporation · 2012