B01D 2259/404
Using four beds
Official title: using four beds
B01D2259/404 (Using four beds) appears on 335 US grants and 199 published applications in this corpus.
Search patents in B01D- Granted patents
- 335
- Published applications
- 199
- Assignees
- 159
- Inventors
- 612
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 10 | 0 |
| 1986 | 5 | 0 |
| 1987 | 7 | 0 |
| 1988 | 15 | 0 |
| 1989 | 9 | 0 |
| 1990 | 6 | 0 |
| 1991 | 8 | 0 |
| 1992 | 14 | 0 |
| 1993 | 9 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 11 | 0 |
| 2002 | 7 | 4 |
| 2003 | 1 | 5 |
| 2004 | 7 | 11 |
| 2005 | 5 | 8 |
| 2006 | 6 | 8 |
| 2007 | 7 | 15 |
| 2008 | 8 | 8 |
| 2009 | 8 | 6 |
| 2010 | 10 | 9 |
| 2011 | 6 | 7 |
| 2012 | 8 | 9 |
| 2013 | 6 | 5 |
| 2014 | 6 | 6 |
| 2015 | 5 | 7 |
| 2016 | 6 | 7 |
| 2017 | 7 | 9 |
| 2018 | 8 | 13 |
| 2019 | 11 | 10 |
| 2020 | 10 | 7 |
| 2021 | 4 | 8 |
| 2022 | 10 | 9 |
| 2023 | 10 | 12 |
| 2024 | 6 | 9 |
| 2025 | 3 | 4 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for direct air capture of water and CO26 Oct 2026US 12,752,234 B2Battelle Memorial Institute
- Multi-stage direct capture of CO2 from air11 Aug 2026US 12,702,947 B2ExxonMobil Technology and Engineering Company
- Adsorbent bed with increased hydrothermal stability4 Aug 2026US 12,697,578 B2BASF SE
- Adsorbent bed for mercaptan removal with increased hydrothermal stability28 Jul 2026US 12,691,404 B2BASF SE
- 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
- Systems and methods for optimizing carbon dioxide capture using water vapor adsorption8 Oct 2026US 2026/0306991 A1GE Vernova Infrastructure Technology LLC
- Hydrogen purification system and method16 Apr 2026US 2026/0102736 A1Cummins Emission Solutions Inc.
- Method and system for gas separation in fixed beds26 Mar 2026US 2026/0084106 A1Tata Consultancy Services Limited
- System For Separating Carbon Dioxide From A Gas Flow4 Dec 2025US 2025/0367599 A1MAN Energy Solutions SE
- Method and apparatus for drying a gas20 Nov 2025US 2025/0352945 A1Ateliers Francois
Most cited
By later US patents
- High frequency pressure swing adsorption186US 6,176,897 B1Questor Industries Inc. · 2001
- Regeneration of adsorbents138US 4,784,672 AAir Products and Chemicals, Inc. · 1988
- Recovery of methane from land fill gas136US 4,770,676 AAir Products and Chemicals, Inc. · 1988
- Portable oxygen concentrator124US 4,971,609 A1990
- Hydrogen purification by selective adsorption111US 4,077,779 AAir Products and Chemicals, Inc. · 1978