B01D 2259/4148
Multiple layers positioned apart from each other
B01D2259/4148 (Multiple layers positioned apart from each other) appears on 84 US grants and 77 published applications in this corpus.
Search patents in B01D- Granted patents
- 84
- Published applications
- 77
- Assignees
- 65
- Inventors
- 213
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 4 |
| 2003 | 5 | 2 |
| 2004 | 2 | 7 |
| 2005 | 5 | 4 |
| 2006 | 4 | 4 |
| 2007 | 3 | 3 |
| 2008 | 2 | 4 |
| 2009 | 3 | 3 |
| 2010 | 3 | 4 |
| 2011 | 2 | 4 |
| 2012 | 4 | 3 |
| 2013 | 3 | 2 |
| 2014 | 3 | 0 |
| 2015 | 3 | 1 |
| 2016 | 0 | 3 |
| 2017 | 1 | 1 |
| 2018 | 3 | 4 |
| 2019 | 2 | 3 |
| 2020 | 0 | 2 |
| 2021 | 4 | 4 |
| 2022 | 5 | 4 |
| 2023 | 1 | 1 |
| 2024 | 2 | 3 |
| 2025 | 2 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Adsorbent bed with increased hydrothermal stability6 Oct 2026US 12,752,233 B2BASF SE
- Carbon capture systems14 Oct 2025US 12,440,797 B2Enhanced Energy Group LLC
- Carbon capture systems1 Apr 2025US 12,263,440 B2Enhanced Energy Group LLC
- System and method for removing airborne molecular contaminants from gas streams14 May 2024US 11,980,847 B2Entegris, Inc.
- Carbon capture systems19 Mar 2024US 11,931,685 B2Enhanced Energy Group LLC
- Low sodium activated alumina materials16 Jul 2026US 2026/0199867 A1BASF SE
- An air or gas treatment system comprising a structured adsorbent or catalyst in the first pipe25 Jun 2026US 2026/0175159 A1Atlas Copco Airpower, Naamloze Vennootschap
- Split bed packed column for processing gas and method thereof26 Mar 2026US 2026/0084092 A1Tata Consultancy Services Limited
- Acid gas adsorption device12 Jun 2025US 2025/0186930 A1NGK Insulators, Ltd.
- Adsorbent bed with increased hydrothermal stability24 Apr 2025US 2025/0128200 A1BASF SE
Most cited
By later US patents
- Extraction and concentration of a gas component117US 5,082,473 A1992
- Weight-optimized portable oxygen concentrator104US 7,279,029 B2Air Products and Chemicals, Inc. · 2007
- Optimal pressure swing adsorption refluxing96US 5,565,018 APraxair Technology, Inc. · 1996
- Adsorbent laminate structures87US 6,692,626 B2QuestAir Technologies Inc. · 2004
- Apparatus for low temperature purification of gases78US 5,202,096 AThe BOC Group, Inc. · 1993