C01B 2203/0475
The impurity being carbon dioxide
Official title: the impurity being carbon dioxide
C01B2203/0475 (The impurity being carbon dioxide) appears on 1,458 US grants and 1,832 published applications in this corpus.
Search patents in C01B- Granted patents
- 1,458
- Published applications
- 1,832
- Assignees
- 680
- Inventors
- 3,323
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 8 | 0 |
| 1978 | 13 | 0 |
| 1979 | 10 | 0 |
| 1980 | 11 | 0 |
| 1981 | 2 | 0 |
| 1982 | 9 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 15 | 0 |
| 1989 | 10 | 0 |
| 1990 | 8 | 0 |
| 1991 | 13 | 0 |
| 1992 | 11 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 15 | 0 |
| 1997 | 9 | 0 |
| 1998 | 6 | 0 |
| 1999 | 16 | 0 |
| 2000 | 24 | 0 |
| 2001 | 31 | 6 |
| 2002 | 24 | 36 |
| 2003 | 32 | 49 |
| 2004 | 30 | 58 |
| 2005 | 25 | 72 |
| 2006 | 28 | 65 |
| 2007 | 36 | 68 |
| 2008 | 43 | 69 |
| 2009 | 34 | 86 |
| 2010 | 56 | 131 |
| 2011 | 73 | 120 |
| 2012 | 67 | 95 |
| 2013 | 80 | 72 |
| 2014 | 76 | 80 |
| 2015 | 72 | 69 |
| 2016 | 54 | 55 |
| 2017 | 46 | 59 |
| 2018 | 46 | 49 |
| 2019 | 55 | 50 |
| 2020 | 36 | 48 |
| 2021 | 42 | 57 |
| 2022 | 32 | 67 |
| 2023 | 61 | 106 |
| 2024 | 61 | 99 |
| 2025 | 47 | 113 |
| 2026 | 29 | 53 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- 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
- Converting natural gas to dimethyl ether8 Sep 2026US 12,729,174 B2Saudi Arabian Oil Company
- Process and plant for producing pure hydrogen by steam reforming with low carbon dioxide emissions25 Aug 2026US 12,715,766 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Plasma carbon sequestration system and method25 Aug 2026US 12,715,824 B2Xi' An Jiaotong University
- Steam-Hydrocarbon Reforming with Reduced Carbon Dioxide Emissions8 Oct 2026US 2026/0307987 A1Air Products and Chemicals, Inc.
- Process and apparatus for hydrogen production with low carbon dioxide levels8 Oct 2026US 2026/0307989 A1
- Carbon neutral hydrogen production24 Sep 2026US 2026/0285681 A1Saudi Arabian Oil Company
- Process for producing low-carbon ammonia from natural gas24 Sep 2026US 2026/0285696 A1Publichnoe Aktsionernoe Obshchestvo "NOVATEK"
- Plant and process for producing renewable hydrocarbons with reduced co2-footprint and improved hydrogen integration17 Sep 2026US 2026/0275208 A1Topsoe A/S
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
- 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
- Steam reformer with internal hydrogen purification269US 5,997,594 ANorthwest Power Systems, LLC · 1999