B01D 2259/40037
With two sub-steps
Official title: with two sub-steps
B01D2259/40037 (With two sub-steps) appears on 141 US grants and 37 published applications in this corpus.
Search patents in B01D- Granted patents
- 141
- Published applications
- 37
- Assignees
- 43
- Inventors
- 263
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 13 | 0 |
| 1993 | 10 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 4 |
| 2003 | 2 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 5 |
| 2006 | 1 | 4 |
| 2007 | 4 | 1 |
| 2008 | 3 | 2 |
| 2009 | 1 | 2 |
| 2010 | 4 | 2 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 2 | 1 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 2 | 2 |
| 2021 | 1 | 3 |
| 2022 | 1 | 0 |
| 2023 | 3 | 1 |
| 2024 | 0 | 2 |
| 2025 | 3 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pressure swing adsorption apparatus for high purity hydrogen purification from ammonia decomposition and hydrogen purification method using the same4 Aug 2026US 12,697,581 B2Korea Institute of Energy Research
- Method for mobile pressure swing adsorption oxygen production device30 Dec 2025US 12,508,534 B2Chengdu Yingchen Technology Co., Ltd
- Pressure swing adsorption apparatus for hydrogen purification from decomposed ammonia gas and hydrogen purification method using the same30 Dec 2025US 12,508,535 B2Korea Institute of Energy Research
- Air separation processes using zeolite ITQ-5518 Nov 2025US 12,472,458 B2ExxonMobil Technology and Engineering Company
- Method for producing oxygen via O2 VSA, minimizing valve openings and closings21 Nov 2023US 11,819,796 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Pressure swing adsorption apparatus for high purity hydrogen purification from ammonia decomposition and hydrogen purification method using the same2 Jan 2025US 2025/0001352 A1Korea Institute of Energy Research
- Pressure swing adsorption apparatus for hydrogen purification from decomposed ammonia gas and hydrogen purification method using the same28 Mar 2024US 2024/0100469 A1Korea Institute of Energy Research
- Method for Mobile Pressure Swing Adsorption Oxygen Production Device22 Feb 2024US 2024/0058744 A1Chengdu Yingchen Technology Co., Ltd
- Air separation processes using zeolite itq-5515 Jun 2023US 2023/0182066 A1ExxonMobil Technology and Engineering Company
- Extremely Large Pressure Swing Adsorption Processes for Flue Gas Treatment11 Nov 2021US 2021/0346837 A1University of South Carolina
Most cited
By later US patents
- Apparatus and method of providing concentrated product gas108US 7,722,700 B2Invacare Corporation · 2010
- Layered manifold pressure swing adsorption device and method106US 6,565,635 B2QuestAir Technologies Inc. · 2003
- Pressure swing adsorption recovery102US 4,340,398 AUnion Carbide Corporation · 1982
- PSA multicomponent separation utilizing tank equalization101US 4,816,039 AThe BOC Group, Inc. · 1989
- Optimal pressure swing adsorption refluxing96US 5,565,018 APraxair Technology, Inc. · 1996