C01B 21/045
By adsorption in solids
Official title: {by adsorption in solids}
C01B21/045 (By adsorption in solids) appears on 162 US grants and 88 published applications in this corpus.
Search patents in C01B- Granted patents
- 162
- Published applications
- 88
- Assignees
- 91
- Inventors
- 383
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 11 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 2 |
| 2003 | 9 | 3 |
| 2004 | 3 | 4 |
| 2005 | 3 | 5 |
| 2006 | 0 | 4 |
| 2007 | 1 | 5 |
| 2008 | 3 | 0 |
| 2009 | 1 | 2 |
| 2010 | 3 | 7 |
| 2011 | 4 | 4 |
| 2012 | 4 | 4 |
| 2013 | 4 | 3 |
| 2014 | 4 | 5 |
| 2015 | 8 | 6 |
| 2016 | 5 | 9 |
| 2017 | 8 | 0 |
| 2018 | 1 | 5 |
| 2019 | 6 | 5 |
| 2020 | 1 | 4 |
| 2021 | 5 | 2 |
| 2022 | 0 | 3 |
| 2023 | 3 | 1 |
| 2024 | 2 | 3 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Apparatus, system and method for generating nitrogen gas from fuel-cell exhaust gas23 Sep 2025US 12,424,645 B2Micro Control Systems Ltd.
- Apparatus and system for generating nitrogen gas through dehumidifying and filtering fuel cell exhaust gas7 May 2024US 11,978,935 B2Micro Control Systems Ltd.
- Self-contained nitrogen generator16 Jan 2024US 11,872,523 B2
- Air separators and related methods3 Oct 2023US 11,772,040 B2JDL Tech USA LLC
- Hybrid nitrogen gas generation system8 Aug 2023US 11,717,785 B2Frito-Lay North America, Inc.
- Geothermally driven ammonia production1 May 2025US 2025/0136457 A1EnhancedGEO Holdings, LLC
- Facility for recovering co2 from a feed gas flow17 Apr 2025US 2025/0121315 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process for the preparation of green ammonia synthesis gas24 Oct 2024US 2024/0351896 A1Topsoe A/S
- Method and device for stepwise pressure-equalized pressure swing adsorption (psa) gas separation by changing paths19 Sep 2024US 2024/0307812 A1Shandong Gamma Gas Engineering Co., Ltd.
- Apparatus, system and method for generating nitrogen gas from fuel-cell exhaust gas30 May 2024US 2024/0178423 A1Micro Control Systems Ltd.
Most cited
By later US patents
- Process for separating components of a gas stream137US 4,701,187 AAir Products and Chemicals, Inc. · 1987
- Layered manifold pressure swing adsorption device and method106US 6,565,635 B2QuestAir Technologies Inc. · 2003
- Adsorbent regeneration and gas separation utilizing microwave heating96US 4,322,394 ABattelle Memorial Institute · 1982
- Process and apparatus for producing liquid carbon dioxide93US 5,233,837 AEnerfex, Inc. · 1993
- Nitrogen adsorption with a Ca and/or Sr exchanged lithium X-zeolite87US 5,152,813 AAir Products and Chemicals, Inc. · 1992