B01D 2259/40028
Depressurization
B01D2259/40028 (Depressurization) appears on 298 US grants and 153 published applications in this corpus.
Search patents in B01D- Granted patents
- 298
- Published applications
- 153
- Assignees
- 110
- Inventors
- 561
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 10 | 0 |
| 1984 | 7 | 0 |
| 1985 | 9 | 0 |
| 1986 | 3 | 0 |
| 1987 | 10 | 0 |
| 1988 | 16 | 0 |
| 1989 | 8 | 0 |
| 1990 | 9 | 0 |
| 1991 | 9 | 0 |
| 1992 | 14 | 0 |
| 1993 | 14 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 6 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 7 | 0 |
| 2002 | 8 | 7 |
| 2003 | 10 | 5 |
| 2004 | 2 | 2 |
| 2005 | 2 | 9 |
| 2006 | 1 | 9 |
| 2007 | 5 | 4 |
| 2008 | 6 | 4 |
| 2009 | 4 | 6 |
| 2010 | 8 | 5 |
| 2011 | 1 | 1 |
| 2012 | 4 | 5 |
| 2013 | 2 | 6 |
| 2014 | 5 | 4 |
| 2015 | 6 | 5 |
| 2016 | 4 | 4 |
| 2017 | 5 | 10 |
| 2018 | 6 | 9 |
| 2019 | 9 | 7 |
| 2020 | 10 | 10 |
| 2021 | 7 | 3 |
| 2022 | 4 | 7 |
| 2023 | 8 | 6 |
| 2024 | 2 | 8 |
| 2025 | 5 | 8 |
| 2026 | 4 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- High recovery process for purification of multicomponent gases30 Jun 2026US 12,667,803 B2Praxair Technology, Inc.
- Processes and apparatuses for reducing molecular weight fluctuation in a tail gas stream from a pressure swing adsorption process26 May 2026US 12,636,607 B2Uop LLC
- 2×7 rotary valve19 May 2026US 12,631,259 B2Air Products and Chemicals, Inc.
- Method and system for upgrading biogas using PSA21 Apr 2026US 12,605,672 B2Iogen Corporation
- Method for mobile pressure swing adsorption oxygen production device30 Dec 2025US 12,508,534 B2Chengdu Yingchen Technology Co., Ltd
- Method for treating a fluid, fluid discharge device for a fluid and associated system8 Oct 2026US 2026/0306992 A1
- Dac apparatus1 Oct 2026US 2026/0295504 A1Honda Motor Co., Ltd.
- 2x7 Rotary Valve24 Sep 2026US 2026/0287072 A1Air Products and Chemicals, Inc.
- Adsorption process28 May 2026US 2026/0145117 A1Korea Institute of Energy Research
- Carbon dioxide removal system26 Mar 2026US 2026/0084091 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Selective adsorption process139US 3,986,849 AUnion Carbide Corporation · 1976
- Methods and apparatuses for gas separation by pressure swing adsorption with partial gas product feed to fuel cell power source139US 6,866,950 B2QuestAir Technologies Inc. · 2005
- Process for the separation/recovery of gases114US 6,179,900 B2GKSS-Forschungszentrum Geesthacht GmbH · 2001
- Single bed pressure swing adsorption system and process113US 5,370,728 APraxair Technology, Inc. · 1994
- Hydrogen purification by selective adsorption111US 4,077,779 AAir Products and Chemicals, Inc. · 1978