B01D 2259/40062
Four
B01D2259/40062 (Four) appears on 121 US grants and 61 published applications in this corpus.
Search patents in B01D- Granted patents
- 121
- Published applications
- 61
- Assignees
- 64
- Inventors
- 228
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 6 | 6 |
| 2003 | 3 | 5 |
| 2004 | 5 | 2 |
| 2005 | 1 | 4 |
| 2006 | 1 | 3 |
| 2007 | 2 | 5 |
| 2008 | 5 | 2 |
| 2009 | 2 | 2 |
| 2010 | 3 | 5 |
| 2011 | 2 | 2 |
| 2012 | 2 | 2 |
| 2013 | 3 | 1 |
| 2014 | 1 | 2 |
| 2015 | 2 | 3 |
| 2016 | 3 | 2 |
| 2017 | 2 | 2 |
| 2018 | 2 | 2 |
| 2019 | 2 | 3 |
| 2020 | 1 | 2 |
| 2021 | 2 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 3 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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 capturing CO2 with assisted vapor compression4 Apr 2023US 11,617,981 B1Saudi Arabian Oil Company
- Temperature-swing adsoroption process31 May 2022US 11,344,838 B2Casale SA
- Method for concentrating ozone gas and apparatus for concentrating ozone gas21 Sep 2021US 11,123,679 B2Iwatani Corporation
- Method and system for upgrading biogas using psa24 Apr 2025US 2025/0128201 A1Iogen Corporation
- Method and system for upgrading biogas using psa2 Jan 2025US 2025/0001351 A1Iogen Corporation
- Process reducing energy consumption in gas fermentation3 Oct 2024US 2024/0327873 A1LanzaTech, Inc.
- Method for Mobile Pressure Swing Adsorption Oxygen Production Device22 Feb 2024US 2024/0058744 A1Chengdu Yingchen Technology Co., Ltd
- Structures and methods for enhancing capture of carbon dioxide from ambient air15 Feb 2024US 2024/0050885 A1W. L. Gore & Associates, Inc.
Most cited
By later US patents
- High frequency pressure swing adsorption186US 6,176,897 B1Questor Industries Inc. · 2001
- Removal of water and carbon dioxide from atmospheric air159US 4,711,645 AAir Products and Chemicals, Inc. · 1987
- Process for purifying a gas by adsorption of the impurities on several active carbons147US 6,402,813 B2L 'Air Liquide-Societe 'Anonyme a 'Directoire et Conseil de Surveillance pour l 'Etude et L'Exploitation des Procedes Georges Claude · 2002
- Removal of water and carbon dioxide from air113US 4,249,915 AAir Products and Chemicals, Inc. · 1981
- Layered manifold pressure swing adsorption device and method106US 6,565,635 B2QuestAir Technologies Inc. · 2003