C07C 45/87
Preparation of ketenes or dimeric ketenes
Official title: Preparation of ketenes or dimeric ketenes (heterocyclic compounds C07D)
C07C45/87 (Preparation of ketenes or dimeric ketenes) appears on 60 US grants and 24 published applications in this corpus.
Search patents in C07C- Granted patents
- 60
- Published applications
- 24
- Assignees
- 35
- Inventors
- 141
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 5 |
| 2009 | 5 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 3 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 2 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Solvent drying solution and processes therfor17 Mar 2026US 12,577,185 B2Aquafortus Technologies Limited
- Continuous process for preparing methacrolein5 Mar 2024US 11,919,846 B2Rohm Co., Ltd.
- Wood acetylation process4 Feb 2020US 10,550,065 B2Tricoya Technologies Ltd
- Method of producing potassium sorbate particles10 Jul 2018US 10,016,734 B2
- Preparation of pentanol with ethanol derived from fermentation23 May 2017US 9,656,932 B2Pioneer Energy, Inc.
- A solvent drying solution and processes therfor8 Aug 2024US 2024/0262772 A1Aquafortus Technologies Limited
- Process for Making Sorbic Acid from Renewable Materials20 Apr 2023US 2023/0118462 A1Celanese International Corporation
- Continuous process for preparing methacrolein25 Nov 2021US 2021/0363089 A1Rohm Co., Ltd.
- Method for producing ketene derivative10 Jun 2021US 2021/0171428 A1Daicel Corporation
- Method of producing potassium sorbate particles1 Feb 2018US 2018/0028995 A1Ningbo Wanglong Tech Co.,Ltd
Most cited
By later US patents
- Catalyst and process for synthesis of ketenes from carboxylic acids129US 5,475,144 AUniversity of Delaware · 1995
- Functionalized monolith catalyst and process for production of ketenes119US 6,232,504 B1University of Delaware · 2001
- Preparation of fluorocarbonyl compounds115US 4,357,282 AE. I. Du Pont de Nemours and Company · 1982
- Process for the manufacture of 2,2,4,4-tetramethycyclobutanediol80US 5,169,994 AEastman Kodak Company · 1992
- Process for the manufacture of 2,2,4,4-tetramethylcyclobutanediol74US 5,258,556 AEastman Kodak Company · 1993