C07C 51/23
Of oxygen-containing groups to carboxyl groups
Official title: of oxygen-containing groups to carboxyl groups
C07C51/23 (Of oxygen-containing groups to carboxyl groups) appears on 462 US grants and 376 published applications in this corpus.
Search patents in C07C- Granted patents
- 462
- Published applications
- 376
- Assignees
- 238
- Inventors
- 1,159
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 11 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 9 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 7 | 0 |
| 1991 | 3 | 0 |
| 1992 | 11 | 0 |
| 1993 | 11 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 6 | 0 |
| 1998 | 14 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 0 |
| 2002 | 11 | 9 |
| 2003 | 6 | 8 |
| 2004 | 8 | 12 |
| 2005 | 5 | 9 |
| 2006 | 12 | 12 |
| 2007 | 3 | 16 |
| 2008 | 6 | 11 |
| 2009 | 7 | 9 |
| 2010 | 7 | 23 |
| 2011 | 11 | 23 |
| 2012 | 15 | 27 |
| 2013 | 20 | 18 |
| 2014 | 22 | 19 |
| 2015 | 22 | 34 |
| 2016 | 31 | 22 |
| 2017 | 19 | 19 |
| 2018 | 17 | 13 |
| 2019 | 17 | 14 |
| 2020 | 11 | 10 |
| 2021 | 5 | 14 |
| 2022 | 7 | 15 |
| 2023 | 9 | 16 |
| 2024 | 11 | 13 |
| 2025 | 4 | 5 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing acrylic acid18 Aug 2026US 12,709,591 B2Nippon Shokubai Co., Ltd.
- Method for co-production of carboxylic acid and epsilon-caprolactone based on aerobic oxidation9 Jun 2026US 12,649,711 B2Zhejiang University
- Trickle bed reactor24 Mar 2026US 12,583,810 B2Solugen, Inc.
- Method for producing isobutylene, method for producing methacrylic acid, and method for producing methyl methacrylate10 Mar 2026US 12,570,598 B2Mitsubishi Chemical Corporation
- Method for producing a catalytically active multi-element oxide containing the elements Mo, W, V and Cu1 Jul 2025US 12,343,708 B2BASF SE
- Apparatus and method for manufacturing isobutyric acid30 Apr 2026US 2026/0116839 A1Nan Ya Plastics Corporation
- Catalyst for producing unsaturated carboxylic acid, method for producing same, and method for producing unsaturated carboxylic acid5 Mar 2026US 2026/0061402 A1Nippon Kayaku Kabushiki Kaisha
- Process for the preparation of bio-based olefins from primary alcohol5 Mar 2026US 2026/0062361 A1BASF SE
- Group (viii) catalysts for generation of green hydrogen and acetic acid from ethanol and its mechanism thereof29 Jan 2026US 2026/0028301 A1Indian Institute of Technology, Guwahati
- Thermocatalysis method for preparing glycolic acid from waste plastics by one-pot, and catalyst1 Jan 2026US 2026/0001061 A1China University of Petroleum (East China)
Most cited
By later US patents
- Process for producing adipic acid from biomass90US 4,400,468 AHydrocarbon Research, Inc. · 1983
- Process for the production of malonic acid or a salt thereof72US 5,817,870 ADegussa AG · 1998
- Preparation of organic acids63US 6,362,367 B1Union Carbide Chemicals & Plastics Technology Corporation · 2002
- Process for producing unsaturated aldehydes and unsaturated carboxylic acids54US 4,035,418 AMitsubishi Rayon Co., Ltd. · 1977
- Hydrocarbon oxidations catalyzed by iron coordination complexes containing a halogenated ligand45US 4,900,871 ASun Refining and Marketing Company · 1990