F25J 3/04381
Using work extraction by mechanical coupling of compression and expansion so-called companders
Official title: {using work extraction by mechanical coupling of compression and expansion so-called companders}
F25J3/04381 (Using work extraction by mechanical coupling of compression and expansion so-called companders) appears on 69 US grants and 52 published applications in this corpus.
Search patents in F25J- Granted patents
- 69
- Published applications
- 52
- Assignees
- 31
- Inventors
- 126
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 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 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 0 |
| 2002 | 4 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 2 |
| 2006 | 1 | 2 |
| 2007 | 2 | 3 |
| 2008 | 2 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 2 |
| 2015 | 0 | 1 |
| 2016 | 1 | 4 |
| 2017 | 1 | 3 |
| 2018 | 1 | 4 |
| 2019 | 2 | 6 |
| 2020 | 3 | 3 |
| 2021 | 2 | 2 |
| 2022 | 2 | 2 |
| 2023 | 0 | 5 |
| 2024 | 1 | 1 |
| 2025 | 2 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Oxygen liquefier design phasing26 May 2026US 12,638,235 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- 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
- Method for obtaining one or more air products, and air fractionation plant9 Sep 2025US 12,410,974 B2Linde Aktiengesellschaft
- Method for obtaining one or more air products, and air separation unit14 Jan 2025US 12,196,488 B2Linde Aktiengesellschaft
- Apparatus and method for separation of air by cryogenic distillation31 Dec 2024US 12,181,217 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Liquid nitrogen generator and process30 Oct 2025US 2025/0334332 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation unit21 Aug 2025US 2025/0264274 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for separating air by cryogenic distillation8 Feb 2024US 2024/0044578 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for obtaining one or more air products, and air fractionation plant9 Nov 2023US 2023/0358466 A1Linde Aktiengesellschaft
- Cryogenic Air Separation Method and Air Separation Unit27 Apr 2023US 2023/0125267 A1Cryostar SAS
Most cited
By later US patents
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- Turbine/motor (generator) driven booster compressor74US 5,924,307 APraxair Technology, Inc. · 1999
- Efficient process to produce oxygen48US 5,966,967 AAir Products and Chemicals, Inc. · 1999
- Cryogenic processes for separating air43US 4,303,428 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1981
- Process and installation for production of high pressure gaseous fluid38US 5,475,980 AL'Air Liquide, Societe Anonyme pour l'Etude l'Exploitation des Procedes Georges Claude · 1995