B01D 2256/12
Oxygen
B01D2256/12 (Oxygen) appears on 1,194 US grants and 1,094 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,194
- Published applications
- 1,094
- Assignees
- 545
- Inventors
- 2,349
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 7 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 11 | 0 |
| 1983 | 8 | 0 |
| 1984 | 8 | 0 |
| 1985 | 17 | 0 |
| 1986 | 8 | 0 |
| 1987 | 16 | 0 |
| 1988 | 10 | 0 |
| 1989 | 12 | 0 |
| 1990 | 20 | 0 |
| 1991 | 16 | 0 |
| 1992 | 22 | 0 |
| 1993 | 17 | 0 |
| 1994 | 11 | 0 |
| 1995 | 15 | 0 |
| 1996 | 26 | 0 |
| 1997 | 19 | 0 |
| 1998 | 18 | 0 |
| 1999 | 40 | 0 |
| 2000 | 31 | 0 |
| 2001 | 22 | 6 |
| 2002 | 37 | 25 |
| 2003 | 32 | 25 |
| 2004 | 24 | 23 |
| 2005 | 16 | 30 |
| 2006 | 16 | 29 |
| 2007 | 20 | 20 |
| 2008 | 20 | 38 |
| 2009 | 14 | 46 |
| 2010 | 35 | 37 |
| 2011 | 26 | 42 |
| 2012 | 23 | 47 |
| 2013 | 39 | 44 |
| 2014 | 40 | 49 |
| 2015 | 37 | 45 |
| 2016 | 31 | 55 |
| 2017 | 46 | 37 |
| 2018 | 40 | 51 |
| 2019 | 38 | 47 |
| 2020 | 46 | 68 |
| 2021 | 43 | 68 |
| 2022 | 55 | 60 |
| 2023 | 47 | 53 |
| 2024 | 32 | 48 |
| 2025 | 42 | 53 |
| 2026 | 15 | 48 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compact portable oxygen concentrator18 Aug 2026US 12,710,121 B2Inogen, Inc.
- O2 concentrator with sieve bed bypass and control method thereof4 Aug 2026US 12,697,458 B2Breathe Technologies, Inc.
- Oxygen-enriched combustion for natural gas combined cycle operation4 Aug 2026US 12,697,580 B2ExxonMobil Technology and Engineering Company
- System and method of adding gaseous oxygen additive derived from an oxygen concentrator to diesel fuel to improve combustion21 Jul 2026US 12,687,143 B2H2Diesel, Inc.
- Apparatus and method for oxygen and carbon dioxide enrichment of atmospheric air16 Jun 2026US 12,654,127 B1Black Swan, LLC
- Hydrogen and oxygen generation using detonation waves1 Oct 2026US 2026/0296883 A1Green Constellation Inc.
- System and method for separation and use of oxygen from flue gas24 Sep 2026US 2026/0284590 A1GE Infrastructure Technology LLC
- System and method for separation and use of nitrogen from inlet air or flue gas24 Sep 2026US 2026/0284593 A1GE Infrastructure Technology LLC
- Oxygen concentrator assembled with quick-detach molecular sieve10 Sep 2026US 2026/0263997 A1
- Ventilation device having oxygen-supplying function and ventilation method using same3 Sep 2026US 2026/0258962 A1LG Electronics Inc.
Most cited
By later US patents
- 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
- Rapid cycle pressure swing adsorption oxygen concentration method and apparatus193US 5,827,358 AImpact MST, Incorporation · 1998
- High frequency pressure swing adsorption186US 6,176,897 B1Questor Industries Inc. · 2001
- Portable oxygen concentration system and method of using the same182US 6,629,525 B2SeQual Technologies, Inc. · 2003