C01B 2203/047
The impurity being carbon monoxide
Official title: the impurity being carbon monoxide
C01B2203/047 (The impurity being carbon monoxide) appears on 1,308 US grants and 1,405 published applications in this corpus.
Search patents in C01B- Granted patents
- 1,308
- Published applications
- 1,405
- Assignees
- 519
- Inventors
- 2,755
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 11 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 10 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 7 | 0 |
| 1995 | 9 | 0 |
| 1996 | 12 | 0 |
| 1997 | 13 | 0 |
| 1998 | 13 | 0 |
| 1999 | 24 | 0 |
| 2000 | 28 | 0 |
| 2001 | 57 | 25 |
| 2002 | 47 | 98 |
| 2003 | 70 | 113 |
| 2004 | 62 | 113 |
| 2005 | 54 | 98 |
| 2006 | 54 | 115 |
| 2007 | 65 | 103 |
| 2008 | 73 | 113 |
| 2009 | 63 | 78 |
| 2010 | 86 | 116 |
| 2011 | 80 | 85 |
| 2012 | 85 | 50 |
| 2013 | 50 | 49 |
| 2014 | 50 | 29 |
| 2015 | 47 | 31 |
| 2016 | 34 | 28 |
| 2017 | 25 | 22 |
| 2018 | 17 | 19 |
| 2019 | 18 | 20 |
| 2020 | 11 | 14 |
| 2021 | 14 | 13 |
| 2022 | 12 | 8 |
| 2023 | 8 | 12 |
| 2024 | 13 | 15 |
| 2025 | 9 | 22 |
| 2026 | 3 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Catalyst reactor15 Sep 2026US 12,734,473 B2Taiyuan University of Technology
- Hydrogen production process and plant24 Mar 2026US 12,583,746 B2Wood Italiana S.R.L.
- H2 recovery and CO2 separation using membrane6 Jan 2026US 12,515,950 B2Saudi Arabian Oil Company
- Fuel reforming apparatus for higher efficiency reforming2 Dec 2025US 12,486,166 B2Hyundai Motor Company
- Co-production of hydrogen, carbon, electricity, and carbon monoxide with carbon dioxide capture for refining of crude oil18 Nov 2025US 12,473,199 B2Saudi Arabian Oil Company
- Steam-Hydrocarbon Reforming with Reduced Carbon Dioxide Emissions8 Oct 2026US 2026/0307987 A1Air Products and Chemicals, Inc.
- Process for the production of caboxylic acids and carbonyl compounds by utilizing carbon dioxide-rich feedstock1 Oct 2026US 2026/0297010 A1
- Carbon formation chemical looping using oxygen27 Aug 2026US 2026/0250129 A1CZero Inc.
- Plant and process for producing hydrogen from hydrocarbons20 Aug 2026US 2026/0242219 A1Technip Energies France
- Method for producing ammonia with reduced emissions and system thereof13 Aug 2026US 2026/0234011 A1Yara Clean Ammonia AS
Most cited
By later US patents
- Steam reformer with internal hydrogen purification533US 5,861,137 A1999
- 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
- Steam reformer with internal hydrogen purification269US 5,997,594 ANorthwest Power Systems, LLC · 1999
- Hydrogen producing fuel processing system236US 6,221,117 B1IdaTech, LLC · 2001