F25J 3/04333
Using quasi-closed loop internal vapor compression refrigeration cycles
Official title: {using quasi-closed loop internal vapor compression refrigeration cycles, e.g. of intermediate or oxygen enriched (waste-)streams}
F25J3/04333 (Using quasi-closed loop internal vapor compression refrigeration cycles) appears on 240 US grants and 118 published applications in this corpus.
Search patents in F25J- Granted patents
- 240
- Published applications
- 118
- Assignees
- 51
- Inventors
- 256
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 10 | 0 |
| 1990 | 7 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 18 | 0 |
| 1994 | 15 | 0 |
| 1995 | 11 | 0 |
| 1996 | 5 | 0 |
| 1997 | 16 | 0 |
| 1998 | 10 | 0 |
| 1999 | 10 | 0 |
| 2000 | 5 | 0 |
| 2001 | 16 | 2 |
| 2002 | 10 | 5 |
| 2003 | 4 | 0 |
| 2004 | 1 | 3 |
| 2005 | 0 | 2 |
| 2006 | 3 | 2 |
| 2007 | 2 | 4 |
| 2008 | 1 | 4 |
| 2009 | 2 | 2 |
| 2010 | 1 | 3 |
| 2011 | 1 | 4 |
| 2012 | 0 | 5 |
| 2013 | 1 | 4 |
| 2014 | 0 | 3 |
| 2015 | 3 | 4 |
| 2016 | 1 | 4 |
| 2017 | 6 | 9 |
| 2018 | 3 | 4 |
| 2019 | 4 | 1 |
| 2020 | 1 | 6 |
| 2021 | 5 | 9 |
| 2022 | 2 | 4 |
| 2023 | 6 | 11 |
| 2024 | 6 | 11 |
| 2025 | 4 | 8 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Nitrogen generating device and nitrogen generating method31 Mar 2026US 12,590,758 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Device for separating air by cryogenic distillation10 Feb 2026US 12,546,533 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process for cryogenic fractionation of air, air fractionation plant and integrated system composed of at least two air fractionation plants30 Dec 2025US 12,510,294 B2Linde Aktiengesellschaft
- Process and apparatus for intermittent liquefaction operation that can support continuous air separation processing6 Aug 2026US 2026/0227123 A1Air Products and Chemicals, Inc.
- 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
- Liquid nitrogen generator and process30 Oct 2025US 2025/0334332 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Process for recovering hydrogen from a multi-component gas stream113US 4,654,063 AAir Products and Chemicals, Inc. · 1987
- 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 and process for the operation thereof91US 6,202,442 B1L'Air Liquide Societe Anonyme Pour l'Etude et l'Expoitation des Procedes Georges Claude · 2001
- 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
- Liquefied natural gas refrigeration transfer to a cryogenics air separation unit using high presure nitrogen stream67US 5,137,558 AAir Products and Chemicals, Inc. · 1992