F25J 2270/04
Internal refrigeration with work-producing gas expansion loop
F25J2270/04 (Internal refrigeration with work-producing gas expansion loop) appears on 383 US grants and 393 published applications in this corpus.
Search patents in F25J- Granted patents
- 383
- Published applications
- 393
- Assignees
- 151
- Inventors
- 751
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 8 | 0 |
| 1983 | 4 | 0 |
| 1984 | 13 | 0 |
| 1985 | 7 | 0 |
| 1986 | 10 | 0 |
| 1987 | 15 | 0 |
| 1988 | 13 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 11 | 0 |
| 2001 | 10 | 1 |
| 2002 | 6 | 8 |
| 2003 | 7 | 3 |
| 2004 | 7 | 9 |
| 2005 | 4 | 6 |
| 2006 | 4 | 11 |
| 2007 | 2 | 10 |
| 2008 | 6 | 15 |
| 2009 | 10 | 12 |
| 2010 | 4 | 21 |
| 2011 | 5 | 18 |
| 2012 | 4 | 22 |
| 2013 | 6 | 14 |
| 2014 | 10 | 9 |
| 2015 | 6 | 18 |
| 2016 | 12 | 18 |
| 2017 | 15 | 19 |
| 2018 | 10 | 41 |
| 2019 | 15 | 15 |
| 2020 | 24 | 18 |
| 2021 | 15 | 26 |
| 2022 | 9 | 10 |
| 2023 | 13 | 17 |
| 2024 | 9 | 19 |
| 2025 | 8 | 16 |
| 2026 | 10 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and system for efficient hydrogen compression11 Aug 2026US 12,704,116 B2Nuovo Pignone Tecnologie Srl
- Cryogenic gas cooling system and method16 Jun 2026US 12,656,057 B2Chart Energy & Chemicals, Inc.
- Hydrogen liquefaction with stored hydrogen refrigeration source9 Jun 2026US 12,650,259 B2Chart Energy & Chemicals, Inc.
- Process for separating hydrogen from an olefin hydrocarbon effluent vapor stream2 Jun 2026US 12,643,067 B2Enflex, Inc.
- Process and apparatus for separating a mixture of hydrogen and carbon dioxide19 May 2026US 12,629,630 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and plant for separation of carbon dioxide (co2)27 Aug 2026US 2026/0251390 A1Aker Carbon Capture Norway AS
- System and method for the production and supply of a densified liquid oxygen product20 Aug 2026US 2026/0243506 A1
- Carbon dioxide separation plant using external refrigeration circuit, and method13 Aug 2026US 2026/0235355 A1Nuovo Pignone Tecnologie Srl
- Process and apparatus for removing co2 from a gasification syngas16 Jul 2026US 2026/0200728 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and apparatus for drying and purifying a fluid containing carbon dioxide and water11 Jun 2026US 2026/0158440 A1L'Air Liquide, Société Anonyme pour I'Etude et I'Exploitaion des Procédés Georges Claude
Most cited
By later US patents
- Method for the recovery of low purity carbon dioxide104US 4,977,745 A1990
- Hydrocarbon gas processing100US 5,771,712 AElcor Corporation · 1998
- Cryogenic separation of gaseous mixtures99US 4,900,347 AMobil Corporation · 1990
- Absorption process without external solvent97US 5,462,583 AAdvanced Extraction Technologies, Inc. · 1995
- Membrane-augmented power generation94US 6,035,641 AMembane Technology and Research, Inc. · 2000