C07C 21/20
Halogenated butadienes
C07C21/20 (Halogenated butadienes) appears on 24 US grants and 23 published applications in this corpus.
Search patents in C07C- Granted patents
- 24
- Published applications
- 23
- Assignees
- 16
- Inventors
- 58
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 2 |
| 2011 | 2 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 2 | 2 |
| 2020 | 0 | 2 |
| 2021 | 6 | 4 |
| 2022 | 1 | 4 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for producing 1,1,1,4,4,4-hexafluorobut-2-ene23 Sep 2025US 12,421,181 B2The Chemours Company Fc, LLC
- Processes for producing Z-1,1,1,4,4,4-hexafluorobut-2-ene and intermediates for producing same27 Feb 2024US 11,912,639 B2The Chemours Company Fc, LLC
- Method for producing perfluoroalkadiene compounds18 Jan 2022US 11,225,446 B2Daikin Industries, Ltd.
- Production method for hexafluoro-1,3-butadiene7 Dec 2021US 11,192,838 B2Showa Denko K. K.
- Method for producing hexafluoro-1,3-butadiene14 Sep 2021US 11,117,850 B2Showa Denko K. K.
- Process for producing 1,1,1,4,4,4-hexafluorobut-2-ene12 Feb 2026US 2026/0042721 A1The Chemours Company Fc, LLC
- Processes for producing z-1,1,1,4,4,4-hexafluorobut-2-ene and intermediates for producing same23 Jun 2022US 2022/0194879 A1The Chemours Company Fc, LLC
- Processes for producing z-1,1,1,4,4,4-hexafluorobut-2-ene and intermediates for producing same23 Jun 2022US 2022/0194881 A1The Chemours Company Fc, LLC
- Process for producing 1,1,1,4,4,4-hexafluorobut-2-ene26 May 2022US 2022/0162141 A1The Chemours Company Fc, LLC
- Plasma etching method and plasma etching apparatus17 Mar 2022US 2022/0084835 A1Kioxia Corporation
Most cited
By later US patents
- Process for the preparation of chloroprene5US 3,936,508 ABayer Aktiengesellschaft · 1976
- Production of 2-chlorobutadiene-1,33US 3,978,146 AHoechst Aktiengesellschaft · 1976
- Process for the manufacture of chloroprene2US 4,605,800 AE. I. Du Pont de Nemours and Company · 1986
- Fluorobutene derivatives and process for producing same2US 7,259,281 B2Central Glass Company, Limited · 2007
- Method of producing compound having butadiene skeleton containing hydrogen and fluorine and/or chlorine1US 11,046,629 B2Kanto Denka Kogyo Co., Ltd. · 2021