F25J 3/04278
Using external refrigeration units
Official title: {using external refrigeration units, e.g. closed mechanical or regenerative refrigeration units}
F25J3/04278 (Using external refrigeration units) appears on 70 US grants and 41 published applications in this corpus.
Search patents in F25J- Granted patents
- 70
- Published applications
- 41
- Assignees
- 32
- Inventors
- 148
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 9 | 1 |
| 2002 | 1 | 0 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 2 |
| 2006 | 1 | 3 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 2 | 3 |
| 2014 | 0 | 2 |
| 2015 | 0 | 2 |
| 2016 | 1 | 6 |
| 2017 | 0 | 5 |
| 2018 | 3 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 2 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 5 |
| 2024 | 3 | 2 |
| 2025 | 0 | 0 |
| 2026 | 2 | 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.
- Oxygen liquefier design phasing26 May 2026US 12,638,235 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Integrated multicomponent refrigerant and air separation process for producing liquid oxygen15 Oct 2024US 12,117,240 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Chiller, air separation system, and related methods16 Jul 2024US 12,038,230 B2Air Products and Chemicals, Inc.
- Method and apparatus for air separation by cryogenic distillation2 Jul 2024US 12,025,372 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Liquefied gas supply system and air separation unit comprising same14 Nov 2024US 2024/0377130 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- System for storing and producing energy to stabilize the power network22 Feb 2024US 2024/0060717 A1Saipem S.P.A.
- Oxygen liquefier design phasing16 Mar 2023US 2023/0082208 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Nitrogen producing cryogenic air separation unit with excess air circuit23 Feb 2023US 2023/0055205 A1
- Integrated multicomponent refrigerant and air separation process for producing liquid oxygen19 Jan 2023US 2023/0013885 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Liquid oxygen production77US 6,212,904 B1In-X Corporation · 2001
- Compact small volume liquid oxygen production system60US 5,893,275 AIn-X Corporation · 1999
- Method for carrying out subambient temperature, especially cryogenic, separation using refrigeration from a multicomponent refrigerant fluid57US 6,053,008 APraxair Technology, Inc. · 2000
- Incorporated cascade cooling cycle for liquefying a gas by regasifying liquefied natural gas48US 4,054,433 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1977
- Natural gas letdown liquefaction system48US 6,131,407 A2000