C07C 51/21
With molecular oxygen
Official title: with molecular oxygen
C07C51/21 (With molecular oxygen) appears on 2,526 US grants and 1,585 published applications in this corpus.
Search patents in C07C- Granted patents
- 2,526
- Published applications
- 1,585
- Assignees
- 602
- Inventors
- 3,746
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 68 | 0 |
| 1977 | 62 | 0 |
| 1978 | 80 | 0 |
| 1979 | 61 | 0 |
| 1980 | 65 | 0 |
| 1981 | 76 | 0 |
| 1982 | 76 | 0 |
| 1983 | 47 | 0 |
| 1984 | 49 | 0 |
| 1985 | 50 | 0 |
| 1986 | 39 | 0 |
| 1987 | 25 | 0 |
| 1988 | 36 | 0 |
| 1989 | 48 | 0 |
| 1990 | 37 | 0 |
| 1991 | 37 | 0 |
| 1992 | 53 | 0 |
| 1993 | 48 | 0 |
| 1994 | 29 | 0 |
| 1995 | 26 | 0 |
| 1996 | 35 | 0 |
| 1997 | 25 | 0 |
| 1998 | 41 | 0 |
| 1999 | 40 | 0 |
| 2000 | 48 | 0 |
| 2001 | 47 | 22 |
| 2002 | 81 | 78 |
| 2003 | 76 | 76 |
| 2004 | 62 | 109 |
| 2005 | 47 | 97 |
| 2006 | 81 | 110 |
| 2007 | 55 | 107 |
| 2008 | 76 | 82 |
| 2009 | 79 | 69 |
| 2010 | 57 | 85 |
| 2011 | 66 | 81 |
| 2012 | 56 | 59 |
| 2013 | 58 | 61 |
| 2014 | 49 | 55 |
| 2015 | 80 | 85 |
| 2016 | 75 | 67 |
| 2017 | 51 | 36 |
| 2018 | 44 | 37 |
| 2019 | 36 | 32 |
| 2020 | 30 | 36 |
| 2021 | 23 | 33 |
| 2022 | 20 | 33 |
| 2023 | 21 | 36 |
| 2024 | 24 | 46 |
| 2025 | 9 | 29 |
| 2026 | 22 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Two-stage preparation process for α,ß-ethylenically unsaturated carboxylic acids and plant for the purpose1 Sep 2026US 12,723,015 B2BASF SE
- Method for producing (meth)acrolein and method for producing (meth)acrylic acid25 Aug 2026US 12,715,833 B2Mitsubishi Chemical Corporation
- Method for producing acrylic acid18 Aug 2026US 12,709,591 B2Nippon Shokubai Co., Ltd.
- Catalyst28 Jul 2026US 12,691,438 B2Mitsubishi Chemical Corporation
- Co-production of monomers, including at least one bio-based monomer28 Jul 2026US 12,692,217 B2Archer Daniels Midland Company
- Systems and methods for production of acrylic acid30 Jul 2026US 2026/0217637 A1
- Method for preparing acrylic acid30 Jul 2026US 2026/0217639 A1LG Chem.Ltd.
- Catalyst and method for producing compound using same23 Jul 2026US 2026/0208169 A1Nippon Kayaku Kabushiki Kaisha
- Concentration of aqueous acetic acid by clathrate hydrate formation23 Jul 2026US 2026/0209156 A1NOVA Chemicals (International) S.A.
- Method for preparation of acrylic acid2 Jul 2026US 2026/0184661 A1LG Chem.Ltd.
Most cited
By later US patents
- Process for the production of fiber-grade terephthalic acid129US 4,158,738 AE. I. Du Pont de Nemours and Company · 1979
- Process for producing terephthalic acid by catalytic liquid phase oxidation of para-xylene124US 3,996,271 AMitsui Petrochemical Industries, Ltd. · 1976
- Method for producing an unsaturated carboxylic acid121US 5,380,933 AMitsubishi Kasei Corporation · 1995
- Integrated process for the production of vinyl acetate and/or acetic acid118US 6,040,474 ABP Chemicals Limited · 2000
- Low temperature oxydehydrogenation of ethane to ethylene105US 4,250,346 AUnion Carbide Corporation · 1981