C07C 51/31
Of cyclic compounds with ring-splitting
Official title: of cyclic compounds with ring-splitting
C07C51/31 (Of cyclic compounds with ring-splitting) appears on 402 US grants and 188 published applications in this corpus.
Search patents in C07C- Granted patents
- 402
- Published applications
- 188
- Assignees
- 208
- Inventors
- 842
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 17 | 0 |
| 1978 | 17 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 10 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 9 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 10 | 0 |
| 1993 | 12 | 0 |
| 1994 | 8 | 0 |
| 1995 | 14 | 0 |
| 1996 | 8 | 0 |
| 1997 | 13 | 0 |
| 1998 | 12 | 0 |
| 1999 | 12 | 0 |
| 2000 | 10 | 0 |
| 2001 | 12 | 4 |
| 2002 | 17 | 6 |
| 2003 | 5 | 8 |
| 2004 | 5 | 11 |
| 2005 | 3 | 10 |
| 2006 | 13 | 12 |
| 2007 | 6 | 4 |
| 2008 | 6 | 11 |
| 2009 | 7 | 12 |
| 2010 | 11 | 10 |
| 2011 | 10 | 2 |
| 2012 | 3 | 9 |
| 2013 | 4 | 9 |
| 2014 | 7 | 15 |
| 2015 | 11 | 8 |
| 2016 | 10 | 8 |
| 2017 | 9 | 10 |
| 2018 | 2 | 2 |
| 2019 | 5 | 5 |
| 2020 | 9 | 6 |
| 2021 | 2 | 9 |
| 2022 | 7 | 4 |
| 2023 | 3 | 0 |
| 2024 | 2 | 4 |
| 2025 | 1 | 4 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for preparing linear hydrocarbon double acid with cyclic hydrocarbon oxidation catalyst24 Mar 2026US 12,583,811 B2Hanwha Solutions Corporation
- Methods of depolymerizing lignin4 Feb 2025US 12,215,077 B2Wisconsin Alumni Research Foundation
- Method for producing dicarboxylic acid4 Jun 2024US 11,999,688 B2Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Method for producing propionic acid derivative2 Apr 2024US 11,945,773 B2Daikin Industries, Ltd.
- Method for producing lactic acid from waste paper using lanthanide-based metal catalyst24 Oct 2023US 11,794,167 B2Korea Institute of Science and Technology
- Catalyst for simultaneous conversion reaction of sugar to alcohol and acid and method for simultaneously producing alcohol and acid from sugar by using same16 Jul 2026US 2026/0199878 A1Korea Research Institute of Chemical Technology
- Method for non-catalytic extraction of phenolic aldehydes from lignocellulosic biomass30 Apr 2026US 2026/0116837 A1
- Upcycling waste polystyrene to adipic acid through a hybrid chemical and biological process30 Apr 2026US 2026/0117039 A1Alliance for Energy Innovation, LLC
- Recycled content organic chemical compounds from waste plastic5 Feb 2026US 2026/0035324 A1Eastman Chemical Company
- Preparation method for intermediate compound acting as synthetic posaconazole, and intermediate compound prepared thereby29 Jan 2026US 2026/0028322 A1Zhejiang Ausun Pharmaceutical Co., Ltd.
Most cited
By later US patents
- Organometallic fluorenyl compounds, preparation, and use147US 5,436,305 APhillips Petroleum Company · 1995
- Vinly-substituted bridged metallocenes111US 5,565,592 APhillips Petroleum Company · 1996
- Organometallic fluorenyl compounds and use thereof in an alpha-olefin polymerization process111US 5,571,880 APhillips Petroleum Company · 1996
- Process for producing broad molecular weight polyolefin107US 5,594,078 APhillips Petroleum Company · 1997
- Cyclopentadiene type compounds and method for making103US 5,191,132 APhillips Petroleum Company · 1993