C01B 2203/147
Three or more purification steps in series
C01B2203/147 (Three or more purification steps in series) appears on 203 US grants and 237 published applications in this corpus.
Search patents in C01B- Granted patents
- 203
- Published applications
- 237
- Assignees
- 121
- Inventors
- 516
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 2 |
| 2002 | 5 | 13 |
| 2003 | 5 | 4 |
| 2004 | 5 | 10 |
| 2005 | 2 | 5 |
| 2006 | 7 | 8 |
| 2007 | 4 | 4 |
| 2008 | 7 | 7 |
| 2009 | 2 | 7 |
| 2010 | 5 | 11 |
| 2011 | 4 | 23 |
| 2012 | 8 | 21 |
| 2013 | 5 | 5 |
| 2014 | 9 | 9 |
| 2015 | 12 | 12 |
| 2016 | 13 | 11 |
| 2017 | 8 | 11 |
| 2018 | 9 | 6 |
| 2019 | 8 | 5 |
| 2020 | 5 | 2 |
| 2021 | 2 | 8 |
| 2022 | 5 | 11 |
| 2023 | 9 | 12 |
| 2024 | 7 | 12 |
| 2025 | 5 | 12 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- ATR-based hydrogen process and plant16 Jun 2026US 12,655,021 B2Haldor TopsøE A/S
- Direct coupled atmospheric carbon reduction device with hydrogen utilization24 Mar 2026US 12,583,744 B2
- Hydrogen production process and plant24 Mar 2026US 12,583,746 B2Wood Italiana S.R.L.
- Steam-hydrocarbon reforming with low steam production3 Mar 2026US 12,565,424 B2Air Products and Chemicals, Inc.
- Method of recovering a hydrogen-enriched product and CO2 in a hydrogen production unit30 Sep 2025US 12,428,295 B2Uop LLC
- Method for production of blue ammonia6 Aug 2026US 2026/0225904 A1Topsoe A/S
- Multi-stage hydrogen/helium separation using hydrogen-selective membranes11 Jun 2026US 2026/0158436 A1Hydrogen Onsite, S.L.
- Steam-Hydrocarbon Reforming with Low Steam Production11 Jun 2026US 2026/0159384 A1Air Products and Chemicals, Inc.
- Blue hydrogen process and plant14 May 2026US 2026/0132026 A1Topsoe A/S
- Reactor systems and processes for light hydrocarbon catalytic cracking to produce high value hydrogen and solid carbon5 Mar 2026US 2026/0062288 A1
Most cited
By later US patents
- Method of methanol production328US 4,927,857 AEngelhard Corporation · 1990
- Integrated hydrocarbon reforming system and controls150US 6,641,625 B1Nuvera Fuel Cells, LLC · 2003
- Reactor-membrane permeator process for hydrocarbon reforming and water gas-shift reactions135US 6,090,312 A2000
- Utilization of synthesis gas produced by mixed conducting membranes127US 6,110,979 AAir Products and Chemicals, Inc. · 2000
- Hydrogen production method117US 7,931,888 B2Praxair Technology, Inc. · 2011