B01D 2259/40018
With more than three sub-steps
Official title: with more than three sub-steps
B01D2259/40018 (With more than three sub-steps) appears on 18 US grants and 11 published applications in this corpus.
Search patents in B01D- Granted patents
- 18
- Published applications
- 11
- Assignees
- 14
- Inventors
- 50
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 3 |
| 2007 | 1 | 1 |
| 2008 | 2 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 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
- Pressure swing adsorption type hydrogen manufacturing apparatus28 Jun 2022US 11,369,915 B2Osaka Gas Co., Ltd.
- Process for gas separations using zeolite SSZ-134 Apr 2017US 9,610,534 B1Chevron U.S.A.Inc.
- Methods of removing contaminants from a hydrocarbon stream by swing adsorption and related apparatus and systems27 Oct 2015US 9,168,485 B2ExxonMobil Upstream Research Company
- Oxygen production process using three-stage pressure swing adsorption plants12 Jan 2010US 7,645,325 B2Chendgu Tianli Chemical Engineering Technology Co., Ltd.
- 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 Type Hydrogen Manufacturing Apparatus23 Apr 2020US 2020/0122080 A1Osaka Gas Co., Ltd.
- Process for gas separations using zeolite ssz-1316 Mar 2017US 2017/0072359 A1Chevron U.S.A.Inc.
- Methods of Removing Contaminants from a Hydrocarbon Stream by Swing Adsorption and Related Apparatus and Systems12 Dec 2013US 2013/0327216 A1ExxonMobil Upstream Research Company
- Oxygen Production Process Using Three-Stage Pressure Swing Adsorption Plants4 Oct 2007US 2007/0227354 A1Chendgu Tianli Chemical Engineering Technology Co., Ltd.
Most cited
By later US patents
- 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
- Method for producing oxygen by adsorption separation from air45US 5,223,004 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1993
- Methods of removing contaminants from a hydrocarbon stream by swing adsorption and related apparatus and systems44US 9,168,485 B2ExxonMobil Upstream Research Company · 2015
- Helium recovery27US 7,294,172 B2Praxair Technology, Inc. · 2007