C01B 3/50
Separation of hydrogen or hydrogen-containing gases from gaseous mixtures
Official title: Separation of hydrogen or hydrogen-containing gases from gaseous mixtures, e.g. purification
C01B3/50 (Separation of hydrogen or hydrogen-containing gases from gaseous mixtures) appears on 2,797 US grants and 3,257 published applications in this corpus.
Search patents in C01B- Granted patents
- 2,797
- Published applications
- 3,257
- Assignees
- 1,232
- Inventors
- 6,401
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 17 | 0 |
| 1978 | 14 | 0 |
| 1979 | 13 | 0 |
| 1980 | 20 | 0 |
| 1981 | 13 | 0 |
| 1982 | 27 | 0 |
| 1983 | 15 | 0 |
| 1984 | 18 | 0 |
| 1985 | 20 | 0 |
| 1986 | 13 | 0 |
| 1987 | 28 | 0 |
| 1988 | 28 | 0 |
| 1989 | 19 | 0 |
| 1990 | 17 | 0 |
| 1991 | 26 | 0 |
| 1992 | 21 | 0 |
| 1993 | 13 | 0 |
| 1994 | 19 | 0 |
| 1995 | 17 | 0 |
| 1996 | 29 | 0 |
| 1997 | 22 | 0 |
| 1998 | 23 | 0 |
| 1999 | 46 | 0 |
| 2000 | 53 | 0 |
| 2001 | 72 | 21 |
| 2002 | 58 | 102 |
| 2003 | 82 | 119 |
| 2004 | 71 | 122 |
| 2005 | 54 | 130 |
| 2006 | 67 | 134 |
| 2007 | 67 | 143 |
| 2008 | 83 | 117 |
| 2009 | 80 | 149 |
| 2010 | 103 | 191 |
| 2011 | 124 | 150 |
| 2012 | 110 | 138 |
| 2013 | 113 | 116 |
| 2014 | 117 | 120 |
| 2015 | 119 | 124 |
| 2016 | 94 | 120 |
| 2017 | 92 | 80 |
| 2018 | 93 | 110 |
| 2019 | 78 | 95 |
| 2020 | 74 | 95 |
| 2021 | 76 | 101 |
| 2022 | 72 | 142 |
| 2023 | 90 | 148 |
| 2024 | 92 | 202 |
| 2025 | 102 | 181 |
| 2026 | 70 | 107 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method embodiments for treating produced water using supercritical water desalination coupled with supercritical water oxidation6 Oct 2026US 12,753,101 B1Triad National Security, LLC
- Process and apparatus for cracking ammonia22 Sep 2026US 12,741,867 B2Air Products and Chemicals, Inc.
- Catalyst reactor15 Sep 2026US 12,734,473 B2Taiyuan University of Technology
- Steam methane reforming with process carbon dioxide capture and ammonia firing15 Sep 2026US 12,735,316 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Purge gas conditioning of NH3 plants15 Sep 2026US 12,735,325 B2Stamicarbon B. V.
- Steam-Hydrocarbon Reforming with Reduced Carbon Dioxide Emissions8 Oct 2026US 2026/0307987 A1Air Products and Chemicals, Inc.
- Apparatus for producing hydrogen gas8 Oct 2026US 2026/0307988 A1Hyundai Motor Company
- Process and apparatus for hydrogen production with low carbon dioxide levels8 Oct 2026US 2026/0307989 A1
- Dehumidification apparatus, hydrogen production equipment, and method for operating dehumidification apparatus1 Oct 2026US 2026/0295515 A1Mitsubishi Heavy Industries, Ltd.
- Process for the production of caboxylic acids and carbonyl compounds by utilizing carbon dioxide-rich feedstock1 Oct 2026US 2026/0297010 A1
Most cited
By later US patents
- Steam reformer with internal hydrogen purification533US 5,861,137 A1999
- Method for simultaneous recovery of hydrogen from water and from hydrocarbons351US 5,525,322 AThe Regents of the University of California · 1996
- Hydrogen gas-extraction module and method of fabrication341US 6,152,987 AWorcester Polytechnic Institute · 2000
- Method of producing methanol synthesis gas283US 4,994,093 AKrupp-Koppers GmbH · 1991
- Catalytic ceramic membrane steam-hydrocarbon reformer269US 5,229,102 AMedalert Corporation · 1993