C01B 2203/0465
Composition of the impurity
C01B2203/0465 (Composition of the impurity) appears on 3,082 US grants and 3,645 published applications in this corpus.
Search patents in C01B- Granted patents
- 3,082
- Published applications
- 3,645
- Assignees
- 1,213
- Inventors
- 6,538
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 18 | 0 |
| 1978 | 21 | 0 |
| 1979 | 13 | 0 |
| 1980 | 19 | 0 |
| 1981 | 10 | 0 |
| 1982 | 23 | 0 |
| 1983 | 12 | 0 |
| 1984 | 11 | 0 |
| 1985 | 19 | 0 |
| 1986 | 10 | 0 |
| 1987 | 21 | 0 |
| 1988 | 24 | 0 |
| 1989 | 30 | 0 |
| 1990 | 18 | 0 |
| 1991 | 26 | 0 |
| 1992 | 21 | 0 |
| 1993 | 15 | 0 |
| 1994 | 19 | 0 |
| 1995 | 21 | 0 |
| 1996 | 30 | 0 |
| 1997 | 23 | 0 |
| 1998 | 24 | 0 |
| 1999 | 43 | 0 |
| 2000 | 61 | 0 |
| 2001 | 80 | 32 |
| 2002 | 67 | 130 |
| 2003 | 96 | 153 |
| 2004 | 92 | 176 |
| 2005 | 78 | 170 |
| 2006 | 88 | 167 |
| 2007 | 95 | 176 |
| 2008 | 96 | 164 |
| 2009 | 98 | 188 |
| 2010 | 144 | 246 |
| 2011 | 155 | 212 |
| 2012 | 152 | 155 |
| 2013 | 142 | 145 |
| 2014 | 134 | 137 |
| 2015 | 148 | 119 |
| 2016 | 111 | 119 |
| 2017 | 87 | 99 |
| 2018 | 91 | 87 |
| 2019 | 81 | 82 |
| 2020 | 63 | 78 |
| 2021 | 68 | 87 |
| 2022 | 56 | 108 |
| 2023 | 89 | 167 |
| 2024 | 91 | 174 |
| 2025 | 80 | 178 |
| 2026 | 58 | 96 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01B 2203/0475The impurity being carbon dioxideIndexing code1,458
- C01B 2203/047The impurity being carbon monoxideIndexing code1,308
- C01B 2203/0495The impurity being waterIndexing code743
- C01B 2203/0485The impurity being a sulfur compoundIndexing code659
- C01B 2203/048The impurity being an organic compoundIndexing code624
- C01B 2203/049The impurity being carbonIndexing code145
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
- 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.
- System for effluent stream abatement via pyrolytic emission looping8 Sep 2026US 12,729,114 B2Lyten, Inc.
- 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