C07C 51/252
Of propene, butenes, acrolein or methacrolein
Official title: {of propene, butenes, acrolein or methacrolein}
C07C51/252 (Of propene, butenes, acrolein or methacrolein) appears on 957 US grants and 597 published applications in this corpus.
Search patents in C07C- Granted patents
- 957
- Published applications
- 597
- Assignees
- 190
- Inventors
- 1,211
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 30 | 0 |
| 1977 | 32 | 0 |
| 1978 | 45 | 0 |
| 1979 | 38 | 0 |
| 1980 | 22 | 0 |
| 1981 | 41 | 0 |
| 1982 | 31 | 0 |
| 1983 | 22 | 0 |
| 1984 | 25 | 0 |
| 1985 | 26 | 0 |
| 1986 | 17 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 11 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 13 | 0 |
| 1993 | 15 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 11 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 15 |
| 2002 | 30 | 29 |
| 2003 | 28 | 31 |
| 2004 | 34 | 63 |
| 2005 | 22 | 55 |
| 2006 | 38 | 33 |
| 2007 | 34 | 47 |
| 2008 | 38 | 38 |
| 2009 | 29 | 27 |
| 2010 | 22 | 35 |
| 2011 | 24 | 23 |
| 2012 | 28 | 15 |
| 2013 | 26 | 15 |
| 2014 | 12 | 18 |
| 2015 | 25 | 22 |
| 2016 | 18 | 23 |
| 2017 | 16 | 9 |
| 2018 | 13 | 9 |
| 2019 | 8 | 9 |
| 2020 | 11 | 11 |
| 2021 | 7 | 9 |
| 2022 | 9 | 11 |
| 2023 | 3 | 10 |
| 2024 | 6 | 22 |
| 2025 | 2 | 10 |
| 2026 | 13 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Production of acrolein or acrylic acid from iso-propanol with high yeild and low cost14 Jul 2026US 12,679,795 B2Rohm and Haas 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
- Method for preparation of acrylic acid2 Jul 2026US 2026/0184661 A1LG Chem.Ltd.
- Dehydration catalysts for acrolein production from glycerol and methods for forming the same18 Jun 2026US 2026/0166525 A1Trillium Renewable Chemicals
Most cited
By later US patents
- Catalytic gas-phase oxidation of acrolein to acrylic acid79US 5,739,391 ABASF SE · 1998
- Methods for producing unsaturated carboxylic acids and unsaturated nitriles78US 6,710,207 B2Rohm and Haas Company · 2004
- Anhydrous diluents for the propylene oxidation reaction to acrolein and acrolein oxidation to acrylic acid76US 5,198,578 APlastics Technology Corporation · 1993
- Process for forming multi-component oxide complex catalysts73US 4,148,757 AThe Standard Oil Company · 1979
- Catalysts useful for exothermic reactions70US 4,077,912 AThe Standard Oil Company · 1978