B01D 2259/4003
With two sub-steps
Official title: with two sub-steps
B01D2259/4003 (With two sub-steps) appears on 194 US grants and 54 published applications in this corpus.
Search patents in B01D- Granted patents
- 194
- Published applications
- 54
- Assignees
- 74
- Inventors
- 335
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 10 | 0 |
| 1984 | 6 | 0 |
| 1985 | 7 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 13 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 14 | 0 |
| 1993 | 12 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 8 | 0 |
| 2001 | 6 | 0 |
| 2002 | 5 | 6 |
| 2003 | 8 | 3 |
| 2004 | 0 | 1 |
| 2005 | 2 | 4 |
| 2006 | 0 | 5 |
| 2007 | 2 | 3 |
| 2008 | 4 | 1 |
| 2009 | 4 | 4 |
| 2010 | 2 | 2 |
| 2011 | 0 | 0 |
| 2012 | 2 | 2 |
| 2013 | 1 | 2 |
| 2014 | 2 | 0 |
| 2015 | 1 | 2 |
| 2016 | 2 | 2 |
| 2017 | 3 | 2 |
| 2018 | 0 | 4 |
| 2019 | 4 | 1 |
| 2020 | 2 | 3 |
| 2021 | 1 | 0 |
| 2022 | 2 | 2 |
| 2023 | 3 | 2 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Portable pressure swing adsorption method and system for fuel gas conditioning16 Jan 2024US 11,872,518 B2Coldstream Energy IP, LLC
- Method of producing a hydrogen-enriched product and recovering CO2 in a hydrogen production process unit14 Nov 2023US 11,814,287 B2Uop LLC
- Method of recovering a hydrogen enriched product and CO2 in a hydrogen production unit7 Nov 2023US 11,807,532 B2Uop LLC
- Portable pressure swing adsorption method and system for fuel gas conditioning14 Feb 2023US 11,577,191 B1Coldstream Energy IP, LLC
- Adsorption process28 May 2026US 2026/0145117 A1Korea Institute of Energy Research
- Processes and apparatuses for reducing molecular weight fluctuation in a tail gas stream from a pressure swing adsorption process19 Jun 2025US 2025/0196053 A1Uop LLC
- Portable pressure swing adsorption method and system for low flow rate gas processing22 Aug 2024US 2024/0278167 A1Coldstream Energy IP, LLC
- Portable pressure swing adsorption method and system for fuel gas conditioning30 Mar 2023US 2023/0101201 A1Coldstream Energy IP, LLC
- Portable pressure swing adsorption method and system for fuel gas conditioning16 Mar 2023US 2023/0082278 A1Coldstream Energy IP, LLC
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