F25J 3/04321
Of oxygen
Official title: {of oxygen}
F25J3/04321 (Of oxygen) appears on 53 US grants and 40 published applications in this corpus.
Search patents in F25J- Granted patents
- 53
- Published applications
- 40
- Assignees
- 14
- Inventors
- 84
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 3 |
| 2019 | 2 | 3 |
| 2020 | 2 | 2 |
| 2021 | 1 | 4 |
| 2022 | 1 | 1 |
| 2023 | 2 | 4 |
| 2024 | 2 | 9 |
| 2025 | 3 | 5 |
| 2026 | 5 | 3 |
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
- Apparatus and process for improved argon recovery8 Sep 2026US 12,729,908 B2Air Products and Chemicals, Inc.
- Air separation unit and air separation method25 Aug 2026US 12,716,651 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and plant for low temperature fractionation of air18 Aug 2026US 12,710,228 B2Linde Aktiengesellschaft
- Method for separating air by cryogenic distillation26 May 2026US 12,638,239 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- Cryogenic air separation enhanced gas turbine21 May 2026US 2026/0139621 A1Rtx Corporation
- Air separation unit2 Apr 2026US 2026/0092735 A1L' Air Liquide, Societe Anonyme pour I' Etude et I'Exploitation des Procedes Georges Claude
- Apparatus and Process for Improved Argon Recovery9 Oct 2025US 2025/0314424 A1Air Products and Chemicals, Inc.
- Air separation unit21 Aug 2025US 2025/0264274 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Tonnage nitrogen generator38US 4,222,756 AAir Products and Chemicals, Inc. · 1980
- Double column multiple condenser-reboiler high pressure nitrogen process37US 4,453,957 AUnion Carbide Corporation · 1984
- Tonnage nitrogen air separation with side reboiler condenser35US 4,617,036 AAir Products and Chemicals, Inc. · 1986
- Production of ultra-high purity oxygen from cryogenic air separation plants31US 5,049,173 AAir Products and Chemicals, Inc. · 1991
- Plant for producing gaseous nitrogen28US 4,526,595 AAir Products and Chemicals, Inc. · 1985