B01D 2259/40081
Counter-current
B01D2259/40081 (Counter-current) appears on 381 US grants and 149 published applications in this corpus.
Search patents in B01D- Granted patents
- 381
- Published applications
- 149
- Assignees
- 171
- Inventors
- 678
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 13 | 0 |
| 1989 | 4 | 0 |
| 1990 | 7 | 0 |
| 1991 | 7 | 0 |
| 1992 | 8 | 0 |
| 1993 | 16 | 0 |
| 1994 | 9 | 0 |
| 1995 | 16 | 0 |
| 1996 | 21 | 0 |
| 1997 | 12 | 0 |
| 1998 | 19 | 0 |
| 1999 | 17 | 0 |
| 2000 | 20 | 0 |
| 2001 | 14 | 2 |
| 2002 | 13 | 9 |
| 2003 | 15 | 13 |
| 2004 | 12 | 15 |
| 2005 | 14 | 19 |
| 2006 | 8 | 15 |
| 2007 | 11 | 7 |
| 2008 | 4 | 6 |
| 2009 | 11 | 10 |
| 2010 | 9 | 2 |
| 2011 | 2 | 3 |
| 2012 | 2 | 2 |
| 2013 | 1 | 4 |
| 2014 | 2 | 0 |
| 2015 | 1 | 3 |
| 2016 | 1 | 1 |
| 2017 | 6 | 3 |
| 2018 | 0 | 4 |
| 2019 | 5 | 7 |
| 2020 | 1 | 3 |
| 2021 | 9 | 3 |
| 2022 | 2 | 8 |
| 2023 | 7 | 4 |
| 2024 | 3 | 3 |
| 2025 | 1 | 3 |
| 2026 | 1 | 0 |
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
- 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
- Apparatus and system for swing adsorption processes24 Dec 2024US 12,172,122 B2ExxonMobil Technology and Engineering Company
- Three-product pressure swing adsorption system16 Jul 2024US 12,036,505 B2Uop LLC
- Apparatus and system for swing adsorption processes2 Jan 2024US 11,857,913 B2ExxonMobil Technology and Engineering Company
- Rotary sorption system including recycled isolation loop and purge stream31 Jul 2025US 2025/0242294 A1Munters Corporation
- 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
- Apparatus and process of modular true moving bed for gas separation using heat exchange reactor15 May 2025US 2025/0153090 A1Tata Consultancy Services Limited
- Process reducing energy consumption in gas fermentation3 Oct 2024US 2024/0327873 A1LanzaTech, Inc.
- Three-product pressure swing adsorption system12 Sep 2024US 2024/0299875 A1Uop LLC
Most cited
By later US patents
- Portable oxygen concentration system and method of using the same223US 6,691,702 B2SeQual Technologies, Inc. · 2004
- Flow regulated pressure swing adsorption system153US 6,063,161 ASoFinoy Societte Financiere d'Innovation Inc. · 2000
- Recovery of methane from land fill gas136US 4,770,676 AAir Products and Chemicals, Inc. · 1988
- Filtration device for use with a fuel vapor recovery system124US 6,599,350 B1Hi-Stat Manufacturing Co., Inc. · 2003
- Single bed pressure swing adsorption system and process113US 5,370,728 APraxair Technology, Inc. · 1994