C01B 2203/04
Containing a purification step for the hydrogen or the synthesis gas
Official title: containing a purification step for the hydrogen or the synthesis gas
C01B2203/04 (Containing a purification step for the hydrogen or the synthesis gas) appears on 3,862 US grants and 4,743 published applications in this corpus.
Search patents in C01B- Granted patents
- 3,862
- Published applications
- 4,743
- Assignees
- 1,500
- Inventors
- 8,057
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 19 | 0 |
| 1978 | 21 | 0 |
| 1979 | 13 | 0 |
| 1980 | 20 | 0 |
| 1981 | 10 | 0 |
| 1982 | 25 | 0 |
| 1983 | 13 | 0 |
| 1984 | 15 | 0 |
| 1985 | 20 | 0 |
| 1986 | 10 | 0 |
| 1987 | 22 | 0 |
| 1988 | 25 | 0 |
| 1989 | 30 | 0 |
| 1990 | 19 | 0 |
| 1991 | 26 | 0 |
| 1992 | 25 | 0 |
| 1993 | 16 | 0 |
| 1994 | 24 | 0 |
| 1995 | 23 | 0 |
| 1996 | 32 | 0 |
| 1997 | 24 | 0 |
| 1998 | 30 | 0 |
| 1999 | 45 | 0 |
| 2000 | 67 | 0 |
| 2001 | 89 | 33 |
| 2002 | 69 | 139 |
| 2003 | 100 | 176 |
| 2004 | 103 | 198 |
| 2005 | 80 | 188 |
| 2006 | 101 | 189 |
| 2007 | 106 | 212 |
| 2008 | 110 | 198 |
| 2009 | 119 | 219 |
| 2010 | 164 | 270 |
| 2011 | 176 | 254 |
| 2012 | 175 | 186 |
| 2013 | 174 | 176 |
| 2014 | 162 | 188 |
| 2015 | 195 | 176 |
| 2016 | 160 | 170 |
| 2017 | 139 | 156 |
| 2018 | 136 | 143 |
| 2019 | 119 | 123 |
| 2020 | 104 | 120 |
| 2021 | 107 | 144 |
| 2022 | 91 | 191 |
| 2023 | 133 | 237 |
| 2024 | 139 | 261 |
| 2025 | 131 | 253 |
| 2026 | 95 | 143 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01B 2203/0465Composition of the impurityIndexing code3,082
- C01B 2203/042Purification by adsorption on solidsIndexing code1,311
- C01B 2203/0405Purification by membrane separationIndexing code1,263
- C01B 2203/0435Catalytic purificationIndexing code1,016
- C01B 2203/0415Purification by absorption in liquidsIndexing code730
- C01B 2203/046Purification by cryogenic separationIndexing code241
- C01B 2203/0455Purification by non-catalytic desulfurisationIndexing code67
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
- Ethane activation systems including a composite media and related reactor apparatuses22 Sep 2026US 12,741,274 B2Battelle Energy Alliance, LLC
- Process and apparatus for cracking ammonia22 Sep 2026US 12,741,867 B2Air Products and Chemicals, Inc.
- Reactor and related systems and methods for fuel gas production22 Sep 2026US 12,741,868 B2InnoTech Alberta Inc.
- Catalyst reactor15 Sep 2026US 12,734,473 B2Taiyuan University of Technology
- 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
- Microcomponent chemical process sheet architecture299US 5,811,062 ABattelle Memorial Institute · 1998
- Methanol from coal and natural gas294US 4,407,973 AThe M. W. Kellogg Company · 1983