C01B 17/168
Purification
Official title: {Purification}
C01B17/168 (Purification) appears on 20 US grants and 13 published applications in this corpus.
Search patents in C01B- Granted patents
- 20
- Published applications
- 13
- Assignees
- 16
- Inventors
- 44
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 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 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 3 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Producing hydrogen from hydrogen sulfide1 Sep 2026US 12,722,970 B2Saudi Arabian Oil Company
- Process for simultaneous removal of hydrogen sulfide and heavy metals16 Sep 2025US 12,415,726 B2King Fahd University of Petroleum and Minerals
- Adsorption-based Claus tail gas treatment through regeneration temperature ramping7 Feb 2023US 11,572,274 B2Saudi Arabian Oil Company
- Hydrogen sulfide production method and sulfur recovery method4 Oct 2022US 11,459,236 B2Sumitomo Chemical Company, Limited
- Processes for removing polysulfanes and elemental sulfur from hydrogen sulfide15 Sep 2020US 10,773,958 B2Chevron Phillips Chemical Company LP
- Hydrogen sulfide purification method and lithium sulfide production method5 Jun 2025US 2025/0178897 A1AGC Inc.
- Method for purifying hydrogen sulfide and method for producing lithium sulfide5 Jun 2025US 2025/0178898 A1AGC Inc.
- Producing hydrogen from hydrogen sulfide3 Oct 2024US 2024/0327208 A1Saudi Arabian Oil Company
- Hydrogen sulfide purification method, lithium sulfide production method, hydrogen sulfide purification device, and lithium sulfide production device15 Aug 2024US 2024/0270575 A1AGC Inc.
- Process for simultaneous removal of hydrogen sulfide and heavy metals18 Apr 2024US 2024/0124305 A1King Fahd University of Petroleum and Minerals
Most cited
By later US patents
- Distillative separations of gas mixtures containing methane, carbon dioxide and other components129US 4,462,814 AKoch Process Systems, Inc. · 1984
- Distillative separation of carbon dioxide from hydrogen sulfide28US 4,383,841 AKoch Process Systems, Inc. · 1983
- Method and apparatus for improved gettering for reactant gases19US 4,564,509 ANortheast Semiconductor Inc. · 1986
- Distillative separation of carbon dioxide from hydrogen sulfide15US 4,293,322 AHelix Technology Corporation · 1981
- Method for improving the long-term stability of H.sub.2 S absorption-oxidation process solutions10US 5,102,635 AUnion Oil Company of California · 1992