C01B 7/195
Separation
Official title: {Separation; Purification}
C01B7/195 (Separation) appears on 206 US grants and 117 published applications in this corpus.
Search patents in C01B- Granted patents
- 206
- Published applications
- 117
- Assignees
- 113
- Inventors
- 445
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 11 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 9 | 0 |
| 1994 | 12 | 0 |
| 1995 | 8 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 13 | 0 |
| 1999 | 7 | 0 |
| 2000 | 2 | 0 |
| 2001 | 10 | 4 |
| 2002 | 13 | 12 |
| 2003 | 5 | 3 |
| 2004 | 5 | 10 |
| 2005 | 0 | 3 |
| 2006 | 6 | 3 |
| 2007 | 3 | 9 |
| 2008 | 6 | 6 |
| 2009 | 4 | 5 |
| 2010 | 2 | 4 |
| 2011 | 3 | 9 |
| 2012 | 5 | 5 |
| 2013 | 5 | 5 |
| 2014 | 4 | 3 |
| 2015 | 2 | 0 |
| 2016 | 4 | 7 |
| 2017 | 2 | 1 |
| 2018 | 2 | 7 |
| 2019 | 3 | 2 |
| 2020 | 0 | 1 |
| 2021 | 3 | 5 |
| 2022 | 3 | 3 |
| 2023 | 2 | 2 |
| 2024 | 3 | 6 |
| 2025 | 3 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for purifying ultra-high purity hydrogen fluoride19 May 2026US 12,630,422 B2Ram Technology Co., Ltd.
- Fluoride ion cleaning systems and methods including post-retort fluid stream processing10 Feb 2026US 12,546,015 B2GE Infrastructure Technology LLC
- Method for preparing electronic grade inorganic acids from waste acid solution19 Aug 2025US 12,391,549 B2Green Advanced Technology Ltd.
- Preparation method and use method of material for deep purification of HF electronic gas29 Apr 2025US 12,285,735 B2Zhejiang Britech Co., Ltd.
- Azeotropic or azeotropic-like composition comprising hydrogen fluoride and 1,1,2-trifluoroethane, 1-chloro-2,2-difluoroethane, or 1,2-dichloro-1-fluoroethane18 Mar 2025US 12,251,590 B2Daikin Industries, Ltd.
- Recovery of fluoride from fluoride-containing waste water through membrane separation18 Dec 2025US 2025/0382203 A1Ecolab USA Inc.
- Methods for recovering hydrogen fluoride from a fluorocarbon production process19 Jun 2025US 2025/0197215 A1Honeywell International Inc.
- Fluoride ion cleaning systems and methods including post-retort fluid stream processing31 Oct 2024US 2024/0360564 A1General Electric Company
- Method and apparatus for purifying ultra-high purity hydrogen fluoride18 Jul 2024US 2024/0239656 A1Ram Technology Co., Ltd.
- Hydrogen fluoride gas removal device and method for removing hydrogen fluoride gas16 May 2024US 2024/0157284 A1Resonac Corporation
Most cited
By later US patents
- Integrated process to produce 2,3,3,3-tetrafluoropropene101US 8,058,486 B2Honeywell International Inc. · 2011
- Membrane solvent extraction82US 3,956,112 AAllied Chemical Corporation · 1976
- Method and apparatus for purifying hydrogen fluoride62US 4,952,386 AAthens Corporation · 1990
- Recovery of HF from an alkylation unit acid stream containing acid soluble oil55US 4,199,409 APhillips Petroleum Company · 1980
- Process and composition for drying of gaseous hydrogen halides38US 4,853,148 AAdvanced Technology Materials, Inc. · 1989