F25J 2215/40
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
F25J2215/40 (Air or oxygen enriched air, i.e. generally less than 30mol% of o2) appears on 73 US grants and 63 published applications in this corpus.
Search patents in F25J- Granted patents
- 73
- Published applications
- 63
- Assignees
- 34
- Inventors
- 146
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 2 |
| 2003 | 2 | 1 |
| 2004 | 2 | 3 |
| 2005 | 2 | 3 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 1 | 4 |
| 2010 | 0 | 1 |
| 2011 | 0 | 5 |
| 2012 | 2 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 2 | 2 |
| 2016 | 2 | 3 |
| 2017 | 1 | 1 |
| 2018 | 1 | 6 |
| 2019 | 2 | 5 |
| 2020 | 4 | 5 |
| 2021 | 4 | 4 |
| 2022 | 3 | 3 |
| 2023 | 3 | 4 |
| 2024 | 0 | 1 |
| 2025 | 5 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System for storing and producing energy to stabilize the power network26 May 2026US 12,638,234 B2Saipem S.P.A.
- Method for obtaining one or more air products, and air fractionation plant9 Sep 2025US 12,410,974 B2Linde Aktiengesellschaft
- Cryogenic cooling system for an aircraft15 Jul 2025US 12,358,630 B2Rtx Corporation
- Cryogenic cooling system for an aircraft8 Jul 2025US 12,351,318 B2Rtx Corporation
- Propulsion system cooling control24 Jun 2025US 12,337,974 B2Rtx Corporation
- Process for remote lox/lin production by hpair turbo expansion2 Oct 2025US 2025/0305764 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- System and method for controlling cooling of an electrolyzer unit24 Jul 2025US 2025/0236968 A1ACWA POWER Company
- System for storing and producing energy to stabilize the power network22 Feb 2024US 2024/0060717 A1Saipem S.P.A.
- Method for obtaining one or more air products, and air fractionation plant9 Nov 2023US 2023/0358466 A1Linde Aktiengesellschaft
- Flexible asu for variable energy cost5 Oct 2023US 2023/0314069 A1L'Air Liquide, Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Double column multiple condenser-reboiler high pressure nitrogen process37US 4,453,957 AUnion Carbide Corporation · 1984
- High speed pressure swing adsorption liquid oxygen/liquid nitrogen generating plant34US 4,957,523 APacific Consolidated Industries, LLC · 1990
- Process for refrigerating, corresponding refrigerating cycle and their application to the distillation of air31US 5,157,926 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1992
- Combined installation of a metal production unit and a unit for the separation of air gas31US 5,538,534 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1996
- Producing gaseous fuels of high calorific value29US 3,989,478 APetrocarbon Developments Limited · 1976