B01D 2259/40035
Equalization
B01D2259/40035 (Equalization) appears on 245 US grants and 139 published applications in this corpus.
Search patents in B01D- Granted patents
- 245
- Published applications
- 139
- Assignees
- 81
- Inventors
- 466
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 7 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 10 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 15 | 0 |
| 1993 | 11 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 0 |
| 2002 | 8 | 4 |
| 2003 | 3 | 2 |
| 2004 | 1 | 2 |
| 2005 | 1 | 11 |
| 2006 | 1 | 7 |
| 2007 | 6 | 5 |
| 2008 | 5 | 7 |
| 2009 | 3 | 10 |
| 2010 | 14 | 5 |
| 2011 | 3 | 3 |
| 2012 | 4 | 6 |
| 2013 | 6 | 5 |
| 2014 | 4 | 4 |
| 2015 | 4 | 1 |
| 2016 | 5 | 7 |
| 2017 | 5 | 7 |
| 2018 | 7 | 5 |
| 2019 | 6 | 9 |
| 2020 | 7 | 4 |
| 2021 | 6 | 7 |
| 2022 | 3 | 8 |
| 2023 | 11 | 6 |
| 2024 | 3 | 10 |
| 2025 | 3 | 2 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adsorbent material, adsorption system, and adsorption process25 Aug 2026US 12,714,985 B2Air Products and Chemicals, Inc.
- Oxygen-enriched combustion for natural gas combined cycle operation4 Aug 2026US 12,697,580 B2ExxonMobil Technology and Engineering Company
- 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
- High recovery process for purification of multicomponent gases30 Jun 2026US 12,667,803 B2Praxair Technology, Inc.
- Method for mobile pressure swing adsorption oxygen production device30 Dec 2025US 12,508,534 B2Chengdu Yingchen Technology Co., Ltd
- Adsorption process28 May 2026US 2026/0145117 A1Korea Institute of Energy Research
- Oxygen Concentrator Sorbent Bed Equalization and Feed Manifolds and Method of Using the Same22 Jan 2026US 2026/0021442 A1TDA Research, Inc.
- Adsorbent Material, Adsorption System, and Adsorption Process8 May 2025US 2025/0144601 A1Air Products and Chemicals, Inc.
- 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
- Apparatus and method for supplying oxygen28 Nov 2024US 2024/0390836 A1Oxus Co., Ltd.
Most cited
By later US patents
- Selective adsorption process139US 3,986,849 AUnion Carbide Corporation · 1976
- Apparatus and method of providing concentrated product gas108US 7,722,700 B2Invacare Corporation · 2010
- Layered manifold pressure swing adsorption device and method106US 6,565,635 B2QuestAir Technologies Inc. · 2003
- Pressure swing adsorption recovery102US 4,340,398 AUnion Carbide Corporation · 1982
- PSA multicomponent separation utilizing tank equalization101US 4,816,039 AThe BOC Group, Inc. · 1989