C07C 17/38
Separation
Official title: Separation; Purification; Stabilisation; Use of additives
C07C17/38 (Separation) appears on 1,393 US grants and 927 published applications in this corpus.
Search patents in C07C- Granted patents
- 1,393
- Published applications
- 927
- Assignees
- 352
- Inventors
- 1,999
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 36 | 0 |
| 1977 | 27 | 0 |
| 1978 | 21 | 0 |
| 1979 | 14 | 0 |
| 1980 | 14 | 0 |
| 1981 | 12 | 0 |
| 1982 | 25 | 0 |
| 1983 | 18 | 0 |
| 1984 | 16 | 0 |
| 1985 | 7 | 0 |
| 1986 | 5 | 0 |
| 1987 | 9 | 0 |
| 1988 | 18 | 0 |
| 1989 | 26 | 0 |
| 1990 | 24 | 0 |
| 1991 | 15 | 0 |
| 1992 | 34 | 0 |
| 1993 | 26 | 0 |
| 1994 | 28 | 0 |
| 1995 | 40 | 0 |
| 1996 | 27 | 0 |
| 1997 | 33 | 0 |
| 1998 | 48 | 0 |
| 1999 | 43 | 0 |
| 2000 | 37 | 0 |
| 2001 | 43 | 7 |
| 2002 | 34 | 31 |
| 2003 | 20 | 36 |
| 2004 | 23 | 42 |
| 2005 | 17 | 30 |
| 2006 | 29 | 16 |
| 2007 | 27 | 26 |
| 2008 | 23 | 35 |
| 2009 | 14 | 44 |
| 2010 | 28 | 28 |
| 2011 | 25 | 41 |
| 2012 | 32 | 47 |
| 2013 | 29 | 28 |
| 2014 | 44 | 49 |
| 2015 | 49 | 49 |
| 2016 | 42 | 46 |
| 2017 | 37 | 43 |
| 2018 | 50 | 45 |
| 2019 | 52 | 42 |
| 2020 | 44 | 41 |
| 2021 | 32 | 32 |
| 2022 | 22 | 45 |
| 2023 | 24 | 32 |
| 2024 | 25 | 35 |
| 2025 | 14 | 26 |
| 2026 | 11 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for storing fluorobutene6 Oct 2026US 12,753,137 B2Resonac Corporation
- Method for producing purified trans-1,2-difluoroethylene (HFO-1132(E)) and/or 1,1,2-trifluoroethylene (HFO-1123)8 Sep 2026US 12,729,172 B2Daikin Industries, Ltd.
- Method for storing fluoro-2-butene14 Jul 2026US 12,679,791 B2Resonac Corporation
- HFO-1234ze and HFO-1234yf compositions and processes for producing and using the compositions23 Jun 2026US 12,662,438 B2The Chemours Company Fc, LLC
- Method for recovering raw and auxiliary materials in the production of lithium bis(fluorosulfonyl)imide9 Jun 2026US 12,649,659 B2Catl-Sicong Novel Materials Co., Ltd
- Azeotropic compositions comprising hydrogen fluoride8 Oct 2026US 2026/0308089 A1The Chemours Company Fc, LLC
- Methods for producing 1,1-difluoropropene (hfo-1252zc) from 1-chloro-3,3,3-trifluoropropene (hcfo-1233zd)1 Oct 2026US 2026/0296995 A1
- Methods for producing 1,1-difluoropropene (hfo-1252zc) from 1,1,1-trichloropropane (hcc-260fb)1 Oct 2026US 2026/0296996 A1
- Methods for producing 1,1-difluoropropene (hfo-1252zc) from vinylidene fluoride1 Oct 2026US 2026/0296997 A1
- Hfo-1234ze and hfo-1234yf compositions and processes for producing and using the compositions24 Sep 2026US 2026/0285786 A1The Chemours Company Fc, LLC
Most cited
By later US patents
- Process for the separation of mixtures of substances103US 3,969,196 AStudiengesellschaft Kohle mbH · 1976
- Integrated process to produce 2,3,3,3-tetrafluoropropene101US 8,058,486 B2Honeywell International Inc. · 2011
- Emulsions of perfluorocarbons in aqueous media99US 4,859,363 AI.S. C. Chemicals Limited · 1989
- Azeotrope-like composition of 1,1,1,3,3-pentafluoropropane and hydrogen fluoride94US 6,060,629 AAlliedSignal Inc. · 2000
- Process for producing 1,1,2,3-tetrachloropropene92US 4,650,914 AMonsanto Company · 1987