B01D 2259/40003
Methods relating to valve switching
B01D2259/40003 (Methods relating to valve switching) appears on 511 US grants and 376 published applications in this corpus.
Search patents in B01D- Granted patents
- 511
- Published applications
- 376
- Assignees
- 312
- Inventors
- 1,034
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 7 | 0 |
| 1982 | 9 | 0 |
| 1983 | 5 | 0 |
| 1984 | 9 | 0 |
| 1985 | 11 | 0 |
| 1986 | 9 | 0 |
| 1987 | 8 | 0 |
| 1988 | 11 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 13 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 12 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 12 | 0 |
| 2000 | 20 | 0 |
| 2001 | 7 | 6 |
| 2002 | 14 | 18 |
| 2003 | 21 | 16 |
| 2004 | 13 | 23 |
| 2005 | 14 | 30 |
| 2006 | 16 | 21 |
| 2007 | 15 | 16 |
| 2008 | 12 | 8 |
| 2009 | 12 | 14 |
| 2010 | 17 | 12 |
| 2011 | 9 | 9 |
| 2012 | 5 | 6 |
| 2013 | 8 | 8 |
| 2014 | 9 | 6 |
| 2015 | 5 | 12 |
| 2016 | 13 | 12 |
| 2017 | 10 | 17 |
| 2018 | 16 | 13 |
| 2019 | 13 | 21 |
| 2020 | 18 | 19 |
| 2021 | 8 | 9 |
| 2022 | 16 | 14 |
| 2023 | 7 | 15 |
| 2024 | 12 | 12 |
| 2025 | 14 | 21 |
| 2026 | 8 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Analysis system and method for impurity components in perfluoropropane22 Sep 2026US 12,742,752 B2Lansis Instrument (Shanghai) Co., Ltd
- Pressure swing adsorption device and rotary valve thereof1 Sep 2026US 12,722,114 B2China Petroleum & Chemical Corporation
- Air dryer device and air treatment device4 Aug 2026US 12,697,577 B2KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
- Method for managing a fault in a pressure swing absorption gas treatment unit4 Aug 2026US 12,697,579 B2L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Claude Georges
- Carbon dioxide recovery system23 Jun 2026US 12,661,612 B2Denso Corporation
- Dehumidification apparatus, hydrogen production equipment, and method for operating dehumidification apparatus1 Oct 2026US 2026/0295515 A1Mitsubishi Heavy Industries, Ltd.
- Air drying assembly, air processing unit, pneumatic arrangement, braking arrangement and commercial vehicle1 Oct 2026US 2026/0296392 A1ZF CV Systems Global GmbH
- Apparatus for recovering carbon dioxide17 Sep 2026US 2026/0273451 A1Niterra Co., Ltd.
- Rotary valve with seal sheet for high purity applications10 Sep 2026US 2026/0266385 A1Uop LLC
- Adsorbent system20 Aug 2026US 2026/0241324 A1Flow Dry Technology, Inc.
Most cited
By later US patents
- Gas purification system and method484US 6,514,313 B1Aeronex, Inc. · 2003
- Portable oxygen concentration system and method of using the same310US 6,651,658 B1SeQual Technologies, Inc. · 2003
- Portable oxygen concentration system and method of using the same223US 6,691,702 B2SeQual Technologies, Inc. · 2004
- High efficiency continuous separation process212US 4,402,832 AUop LLC · 1983
- Rapid cycle pressure swing adsorption oxygen concentration method and apparatus193US 5,827,358 AImpact MST, Incorporation · 1998