B01D 2259/402
Using two beds
Official title: using two beds
B01D2259/402 (Using two beds) appears on 1,320 US grants and 899 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,320
- Published applications
- 899
- Assignees
- 586
- Inventors
- 2,432
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 18 | 0 |
| 1978 | 9 | 0 |
| 1979 | 6 | 0 |
| 1980 | 14 | 0 |
| 1981 | 20 | 0 |
| 1982 | 16 | 0 |
| 1983 | 18 | 0 |
| 1984 | 18 | 0 |
| 1985 | 23 | 0 |
| 1986 | 18 | 0 |
| 1987 | 20 | 0 |
| 1988 | 23 | 0 |
| 1989 | 25 | 0 |
| 1990 | 22 | 0 |
| 1991 | 14 | 0 |
| 1992 | 26 | 0 |
| 1993 | 29 | 0 |
| 1994 | 10 | 0 |
| 1995 | 20 | 0 |
| 1996 | 33 | 0 |
| 1997 | 22 | 0 |
| 1998 | 37 | 0 |
| 1999 | 44 | 0 |
| 2000 | 29 | 0 |
| 2001 | 30 | 8 |
| 2002 | 37 | 26 |
| 2003 | 33 | 29 |
| 2004 | 25 | 34 |
| 2005 | 20 | 34 |
| 2006 | 23 | 34 |
| 2007 | 18 | 37 |
| 2008 | 24 | 24 |
| 2009 | 19 | 33 |
| 2010 | 41 | 33 |
| 2011 | 19 | 32 |
| 2012 | 26 | 43 |
| 2013 | 34 | 34 |
| 2014 | 38 | 29 |
| 2015 | 33 | 47 |
| 2016 | 32 | 45 |
| 2017 | 43 | 43 |
| 2018 | 48 | 51 |
| 2019 | 51 | 34 |
| 2020 | 34 | 31 |
| 2021 | 19 | 44 |
| 2022 | 39 | 45 |
| 2023 | 36 | 46 |
| 2024 | 31 | 40 |
| 2025 | 26 | 24 |
| 2026 | 21 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process and apparatus for removing unwanted components from a gas mixture8 Sep 2026US 12,728,382 B2Linde Aktiengesellschaft
- Producing hydrogen from hydrogen sulfide1 Sep 2026US 12,722,970 B2Saudi Arabian Oil Company
- Adsorbent bed with increased hydrothermal stability4 Aug 2026US 12,697,578 B2BASF SE
- Oxygen-enriched combustion for natural gas combined cycle operation4 Aug 2026US 12,697,580 B2ExxonMobil Technology and Engineering Company
- Adsorbent bed for mercaptan removal with increased hydrothermal stability28 Jul 2026US 12,691,404 B2BASF SE
- Method for removing hydrogen fluoride24 Sep 2026US 2026/0284570 A1Resonac Corporation
- Mobile toxic gas purification device20 Aug 2026US 2026/0241323 A1Hanso Inc.
- Multimodal oxygen control module and multimodal oxygen control apparatus6 Aug 2026US 2026/0225027 A1Samsung Electronics Co., Ltd.
- Water Oxygenation System, Flow Block, and External Replaceable Nitrogen Filter Cartridge30 Jul 2026US 2026/0216632 A1
- Integrated zeolite membrane-reactor and adsorption process for co2 capture and conversion to methanol9 Jul 2026US 2026/0192237 A1
Most cited
By later US patents
- Portable oxygen concentration system and method of using the same223US 6,691,702 B2SeQual Technologies, Inc. · 2004
- Removal of water and carbon dioxide from atmospheric air159US 4,711,645 AAir Products and Chemicals, Inc. · 1987
- Carbon dioxide pressure swing adsorption process using modified alumina adsorbents155US 5,917,136 AAir Products and Chemicals, Inc. · 1999
- Method and apparatus for fractioning oxygen153US 4,449,990 AInvacare Respiratory Corp. · 1984
- Method and apparatus for concentrating oxygen149US 4,576,616 AProto-Med, Inc. · 1986