C01B 7/191
Hydrogen fluoride
Official title: {Hydrogen fluoride}
C01B7/191 (Hydrogen fluoride) appears on 420 US grants and 236 published applications in this corpus.
Search patents in C01B- Granted patents
- 420
- Published applications
- 236
- Assignees
- 213
- Inventors
- 833
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 14 | 0 |
| 1978 | 12 | 0 |
| 1979 | 12 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 14 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 14 | 0 |
| 1994 | 13 | 0 |
| 1995 | 11 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 19 | 0 |
| 1999 | 11 | 0 |
| 2000 | 8 | 0 |
| 2001 | 19 | 5 |
| 2002 | 18 | 23 |
| 2003 | 12 | 13 |
| 2004 | 11 | 21 |
| 2005 | 7 | 6 |
| 2006 | 10 | 7 |
| 2007 | 6 | 13 |
| 2008 | 7 | 7 |
| 2009 | 7 | 9 |
| 2010 | 4 | 13 |
| 2011 | 6 | 17 |
| 2012 | 9 | 11 |
| 2013 | 9 | 6 |
| 2014 | 8 | 5 |
| 2015 | 4 | 3 |
| 2016 | 5 | 12 |
| 2017 | 4 | 3 |
| 2018 | 6 | 16 |
| 2019 | 9 | 7 |
| 2020 | 6 | 4 |
| 2021 | 6 | 9 |
| 2022 | 4 | 6 |
| 2023 | 6 | 4 |
| 2024 | 6 | 8 |
| 2025 | 6 | 5 |
| 2026 | 3 | 3 |
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.
- Method for processing hexafluorosilicic acid to produce hydrogen fluoride28 Apr 2026US 12,612,307 B2Obschestvo S Ogranichennoj Otvetstvennostju “Novye Khimicheskie Produkti”
- 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.
- Method for producing fluorine gas15 Jul 2025US 12,358,796 B2Resonac Corporation
- A method for preparing lithium hexafluorophosphate11 Jun 2026US 2026/0159403 A1Gujarat Fluorochemicals Limited
- Method for producing hydrogen fluoride adsorbent7 May 2026US 2026/0124578 A1Resonac Corporation
- Method for fluorine separation and recovery from phosphate rock enhanced with microbubble coupled silicon additive19 Feb 2026US 2026/0048997 A1Institute of Process Engineering, Chinese Academy of Sciences
- Recovery of fluoride from fluoride-containing waste water through membrane separation18 Dec 2025US 2025/0382203 A1Ecolab USA Inc.
- Fluorinated gas abatement and fluoride sequestration using silicon13 Nov 2025US 2025/0345747 A1International Business Machines Corporation
Most cited
By later US patents
- Integrated process to produce 2,3,3,3-tetrafluoropropene101US 8,058,486 B2Honeywell International Inc. · 2011
- Municipal solid waste disposal process92US 5,280,757 A1994
- Plasma torch furnace processing of spent potliner from aluminum smelters90US 5,222,448 AColumbia Ventures Corporation · 1993
- Membrane solvent extraction82US 3,956,112 AAllied Chemical Corporation · 1976
- Method and apparatus for purifying hydrogen fluoride62US 4,952,386 AAthens Corporation · 1990