C01B 2203/146
At least two purification steps in series
C01B2203/146 (At least two purification steps in series) appears on 545 US grants and 661 published applications in this corpus.
Search patents in C01B- Granted patents
- 545
- Published applications
- 661
- Assignees
- 277
- Inventors
- 1,295
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 10 | 0 |
| 1990 | 7 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 17 | 0 |
| 2001 | 15 | 5 |
| 2002 | 10 | 41 |
| 2003 | 22 | 24 |
| 2004 | 23 | 34 |
| 2005 | 12 | 28 |
| 2006 | 18 | 23 |
| 2007 | 13 | 16 |
| 2008 | 17 | 19 |
| 2009 | 13 | 26 |
| 2010 | 21 | 31 |
| 2011 | 19 | 41 |
| 2012 | 21 | 35 |
| 2013 | 14 | 15 |
| 2014 | 25 | 19 |
| 2015 | 22 | 25 |
| 2016 | 20 | 18 |
| 2017 | 15 | 24 |
| 2018 | 16 | 21 |
| 2019 | 19 | 17 |
| 2020 | 18 | 11 |
| 2021 | 6 | 15 |
| 2022 | 15 | 34 |
| 2023 | 26 | 51 |
| 2024 | 23 | 38 |
| 2025 | 22 | 32 |
| 2026 | 12 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Plasma carbon sequestration system and method25 Aug 2026US 12,715,824 B2Xi' An Jiaotong University
- System and method for purifying hydrogen, and system for producing hydrogen by water electrolysis11 Aug 2026US 12,702,949 B2Wuxi Longi Hydrogen Technology Co., Ltd.
- Hydrocarbon production apparatus and hydrocarbon production method21 Jul 2026US 12,686,823 B2Eneos Corporation
- Gas reformer for producing hydrogen16 Jun 2026US 12,655,020 B2Fluor Technologies Corporation
- ATR-based hydrogen process and plant16 Jun 2026US 12,655,021 B2Haldor TopsøE A/S
- Biogas feed for carbon monoxide production27 Aug 2026US 2026/0250588 A1Topsoe A/S
- Production system for organic substance, production device for organic substance, and method for producing organic substance20 Aug 2026US 2026/0242707 A1Sekisui Chemical Co., Ltd.
- Method for producing ammonia with reduced emissions and system thereof13 Aug 2026US 2026/0234011 A1Yara Clean Ammonia AS
- Method for production of blue ammonia6 Aug 2026US 2026/0225904 A1Topsoe A/S
- Ammonia capture and recycle in an ammonia cracker25 Jun 2026US 2026/0176148 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Steam reformer with internal hydrogen purification533US 5,861,137 A1999
- Method of methanol production328US 4,927,857 AEngelhard Corporation · 1990
- Synthesis gas production system and method299US 6,085,512 ASyntroleum Corporation · 2000
- Methanol from coal and natural gas294US 4,407,973 AThe M. W. Kellogg Company · 1983
- Catalytic ceramic membrane steam-hydrocarbon reformer269US 5,229,102 AMedalert Corporation · 1993