F25J 2210/40
Air or oxygen enriched air, i.e. generally less than 30mol% of o2
Official title: Air or oxygen enriched air, i.e. generally less than 30mol% of O2
F25J2210/40 (Air or oxygen enriched air, i.e. generally less than 30mol% of o2) appears on 123 US grants and 161 published applications in this corpus.
Search patents in F25J- Granted patents
- 123
- Published applications
- 161
- Assignees
- 62
- Inventors
- 247
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 2 | 1 |
| 2004 | 3 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 3 | 2 |
| 2008 | 3 | 2 |
| 2009 | 0 | 4 |
| 2010 | 0 | 1 |
| 2011 | 1 | 6 |
| 2012 | 1 | 5 |
| 2013 | 1 | 4 |
| 2014 | 3 | 3 |
| 2015 | 3 | 4 |
| 2016 | 3 | 7 |
| 2017 | 7 | 16 |
| 2018 | 1 | 15 |
| 2019 | 10 | 8 |
| 2020 | 10 | 9 |
| 2021 | 8 | 13 |
| 2022 | 5 | 10 |
| 2023 | 5 | 19 |
| 2024 | 8 | 8 |
| 2025 | 7 | 11 |
| 2026 | 14 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dual temperature liquid oxygen subcooling in an air separation unit22 Sep 2026US 12,742,591 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and a relative apparatus for producing liquified gases8 Sep 2026US 12,729,906 B2Fpt Industrial S.P.A.
- Method and apparatus for cryogenic air separation8 Sep 2026US 12,729,907 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Apparatus and process for improved argon recovery8 Sep 2026US 12,729,908 B2Air Products and Chemicals, Inc.
- Power generation process utilizing fuel, liquid air and/or oxygen with zero CO2 emissions25 Aug 2026US 12,716,650 B2Saipem S.P.A.
- Cryogenic removal of carbon dioxide from the atmosphere17 Sep 2026US 2026/0276301 A1Microsoft Technology Licensing, LLC
- Cryogenic liquefaction system and method27 Aug 2026US 2026/0251386 A1Nearshore Natural Gas, LLC
- System and method for the production and supply of a densified liquid oxygen product20 Aug 2026US 2026/0243506 A1
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- Direct air capture of co26 Aug 2026US 2026/0227124 A1Syntrees LLC
Most cited
By later US patents
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator136US 5,979,440 ASeQual Technologies, Inc. · 1999
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator133US 6,698,423 B1SeQual Technologies, Inc. · 2004
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator101US 6,681,764 B1SeQual Technologies, Inc. · 2004
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator91US 6,651,653 B1SeQual Technologies, Inc. · 2003
- Gas separation process63US 4,417,909 AAirco, Inc. · 1983