B01D 2259/40033
With more than three sub-steps
Official title: with more than three sub-steps
B01D2259/40033 (With more than three sub-steps) appears on 35 US grants and 21 published applications in this corpus.
Search patents in B01D- Granted patents
- 35
- Published applications
- 21
- Assignees
- 21
- Inventors
- 88
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 0 |
| 2010 | 2 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 2 | 4 |
| 2024 | 1 | 2 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High recovery process for purification of multicomponent gases30 Jun 2026US 12,667,803 B2Praxair Technology, Inc.
- Method for mobile pressure swing adsorption oxygen production device30 Dec 2025US 12,508,534 B2Chengdu Yingchen Technology Co., Ltd
- Method for regulating a unit for separating a gas stream15 Jul 2025US 12,357,939 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Portable pressure swing adsorption method and system for fuel gas conditioning16 Jan 2024US 11,872,518 B2Coldstream Energy IP, LLC
- High recovery process for purification of multicomponent gases22 Aug 2023US 11,731,075 B2Praxair Technology, Inc.
- Portable pressure swing adsorption method and system for low flow rate gas processing22 Aug 2024US 2024/0278167 A1Coldstream Energy IP, LLC
- Method for Mobile Pressure Swing Adsorption Oxygen Production Device22 Feb 2024US 2024/0058744 A1Chengdu Yingchen Technology Co., Ltd
- High recovery process for purification of multicomponent gases26 Oct 2023US 2023/0338886 A1Praxair Technology, Inc.
- Method for regulating a unit for separating a gas stream25 May 2023US 2023/0158444 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Portable pressure swing adsorption method and system for fuel gas conditioning30 Mar 2023US 2023/0101201 A1Coldstream Energy IP, LLC
Most cited
By later US patents
- Layered manifold pressure swing adsorption device and method106US 6,565,635 B2QuestAir Technologies Inc. · 2003
- PSA multicomponent separation utilizing tank equalization101US 4,816,039 AThe BOC Group, Inc. · 1989
- Process for the purification of natural gas100US 5,174,796 AUop LLC · 1992
- Gas separation with split stream centrifugal turbomachinery76US 6,398,853 B1Quest Air Gases Inc. · 2002
- Design and operation methods for pressure swing adsorption systems61US 7,390,350 B2Air Products and Chemicals, Inc. · 2008