F25J 3/0409
Of oxygen
Official title: {of oxygen}
F25J3/0409 (Of oxygen) appears on 494 US grants and 375 published applications in this corpus.
Search patents in F25J- Granted patents
- 494
- Published applications
- 375
- Assignees
- 82
- Inventors
- 441
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 9 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 10 | 0 |
| 1993 | 12 | 0 |
| 1994 | 13 | 0 |
| 1995 | 27 | 0 |
| 1996 | 18 | 0 |
| 1997 | 29 | 0 |
| 1998 | 23 | 0 |
| 1999 | 29 | 0 |
| 2000 | 18 | 0 |
| 2001 | 34 | 5 |
| 2002 | 16 | 10 |
| 2003 | 19 | 7 |
| 2004 | 7 | 10 |
| 2005 | 6 | 4 |
| 2006 | 4 | 9 |
| 2007 | 6 | 14 |
| 2008 | 5 | 13 |
| 2009 | 6 | 15 |
| 2010 | 1 | 13 |
| 2011 | 3 | 20 |
| 2012 | 3 | 15 |
| 2013 | 6 | 19 |
| 2014 | 10 | 15 |
| 2015 | 10 | 14 |
| 2016 | 7 | 25 |
| 2017 | 12 | 22 |
| 2018 | 17 | 16 |
| 2019 | 23 | 22 |
| 2020 | 20 | 14 |
| 2021 | 10 | 21 |
| 2022 | 5 | 20 |
| 2023 | 11 | 22 |
| 2024 | 16 | 17 |
| 2025 | 14 | 6 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column15 Sep 2026US 12,736,282 B2Praxair Technology, 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
- System for storing and producing energy to stabilize the power network26 May 2026US 12,638,234 B2Saipem S.P.A.
- 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
- Apparatus for precooling hydrogen for liquefaction using external liquid nitrogen and high pressure gaseous nitrogen24 Mar 2026US 12,584,686 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation method and air separation device30 Jul 2026US 2026/0218981 A1Taiyo Nippon Sanso Corporation
- Process and apparatus for producing argon by cryogenic air separation23 Jul 2026US 2026/0210624 A1
- Method for cryogenic separation of air, and air separation plant16 Jul 2026US 2026/0202125 A1Linde Aktiengesellschaft
- Apparatus and method for maintaining or increasing liquid production of an air separation unit9 Jul 2026US 2026/0194295 A1Air Liquide Large Industries U.S. LP
- Method for increasing production flexibility of an air separation unit28 May 2026US 2026/0146790 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- Combined air separation natural gas liquefaction plant104US 7,143,606 B2L'Air Liquide-Societe Anonyme a'Directoire et Conseil de Surveillance pour l'Etide et l'Exploitation des Procedes Georges Claude · 2006
- Integrated apparatus for generating power and/or oxygen enriched fluid, process for the operation thereof82US 6,276,171 B1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 2001
- Method for carrying out subambient temperature, especially cryogenic, separation using refrigeration from a multicomponent refrigerant fluid57US 6,053,008 APraxair Technology, Inc. · 2000
- Efficient process to produce oxygen48US 5,966,967 AAir Products and Chemicals, Inc. · 1999