C01B 7/196
By distillation
Official title: {by distillation}
C01B7/196 (By distillation) appears on 98 US grants and 50 published applications in this corpus.
Search patents in C01B- Granted patents
- 98
- Published applications
- 50
- Assignees
- 55
- Inventors
- 209
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 9 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 12 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 2 |
| 2002 | 6 | 4 |
| 2003 | 1 | 3 |
| 2004 | 3 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 3 |
| 2007 | 2 | 6 |
| 2008 | 3 | 3 |
| 2009 | 2 | 1 |
| 2010 | 2 | 1 |
| 2011 | 2 | 2 |
| 2012 | 1 | 4 |
| 2013 | 2 | 1 |
| 2014 | 2 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 3 | 3 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for purifying ultra-high purity hydrogen fluoride19 May 2026US 12,630,422 B2Ram Technology Co., Ltd.
- Method for preparing electronic grade inorganic acids from waste acid solution19 Aug 2025US 12,391,549 B2Green Advanced Technology 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.
- Azeotrope-like composition containing 1,2-difluoroethylene or 1,1,2-trifluoroethylene and hydrogen fluoride16 Jul 2024US 12,036,491 B2Daikin Industries, Ltd.
- Converting fluorinated materials into anhydrous hydrogen fluoride20 Feb 2024US 11,905,178 B23M Innovative Properties Company
- Methods for recovering hydrogen fluoride from a fluorocarbon production process19 Jun 2025US 2025/0197215 A1Honeywell International Inc.
- Method and apparatus for purifying ultra-high purity hydrogen fluoride18 Jul 2024US 2024/0239656 A1Ram Technology 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-fluoroethane15 Feb 2024US 2024/0050792 A1Daikin Industries, Ltd.
- Converting fluorinated materials into anhydrous hydrogen fluoride4 Jan 2024US 2024/0002228 A13M Innovative Properties Company
- Methods for graded utilization of fluorine and silicon resources in phosphate ores26 Oct 2023US 2023/0339822 A1Chtem Limited
Most cited
By later US patents
- Separation and purification of fluoride from industrial wastes37US 5,876,685 AIPEC Clean, Inc. · 1999
- Azeotrope compositions comprising E-1,3,3,3-tetrafluoropropene and hydrogen fluoride and uses thereof29US 7,423,188 B2E. I. Du Pont de Nemours and Company · 2008
- Point-of-use ammonia purification for electronic component manufacture28US 5,496,778 AStartec Ventures, Inc. · 1996
- On-site generation of ultra-high-purity buffered-HF for semiconductor processing28US 5,722,442 AStartec Ventures, Inc. · 1998
- Process for separating hydrogen fluoride from fluorocarbons27US 5,918,481 AAlliedSignal Inc. · 1999