F25J 2270/88
Quasi-closed internal refrigeration or heat pump cycle, if not otherwise provided
F25J2270/88 (Quasi-closed internal refrigeration or heat pump cycle, if not otherwise provided) appears on 91 US grants and 102 published applications in this corpus.
Search patents in F25J- Granted patents
- 91
- Published applications
- 102
- Assignees
- 52
- Inventors
- 171
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 3 |
| 2005 | 0 | 0 |
| 2006 | 0 | 4 |
| 2007 | 1 | 2 |
| 2008 | 1 | 2 |
| 2009 | 0 | 4 |
| 2010 | 1 | 6 |
| 2011 | 0 | 6 |
| 2012 | 3 | 4 |
| 2013 | 1 | 3 |
| 2014 | 3 | 4 |
| 2015 | 5 | 10 |
| 2016 | 5 | 6 |
| 2017 | 5 | 10 |
| 2018 | 2 | 13 |
| 2019 | 4 | 4 |
| 2020 | 8 | 6 |
| 2021 | 4 | 4 |
| 2022 | 3 | 7 |
| 2023 | 4 | 1 |
| 2024 | 3 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing liquefied natural gas from natural gas, and corresponding plant13 Jan 2026US 12,523,421 B2Technip Energies France
- Open loop liquefaction process with NGL recovery22 Jul 2025US 12,366,408 B2Honeywell Lng LLC
- System and method to produce liquefied natural gas using a three pinion integral gear machine22 Oct 2024US 12,123,646 B2Praxair Technology, Inc.
- Process and apparatus for the cryogenic separation of a mixture of carbon monoxide, hydrogen and methane for the production of CH423 Apr 2024US 11,965,694 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method to recover and process methane and condensates from flare gas systems2 Apr 2024US 11,946,355 B21304338 Alberta Ltd.
- Open loop liquefaction process with ngl recovery26 Jun 2025US 2025/0207852 A1Honeywell Lng LLC
- Cryogenic Neon Purification System and Method2 Jan 2025US 2025/0003677 A1Chart Energy & Chemicals, Inc.
- Open Loop Liquefaction Process with NGL Recovery18 Apr 2024US 2024/0125549 A1Air Products and Chemicals, Inc.
- Method for producing liquefied natural gas from natural gas, and corresponding plant21 Dec 2023US 2023/0408187 A1Technip France
- System and method to produce liquefied natural gas using two distinct refrigeration cycles with an integral gear machine20 Oct 2022US 2022/0333852 A1
Most cited
By later US patents
- Process for the separation of landfill gas115US 4,681,612 AKoch Process Systems, Inc. · 1987
- Enhanced NGL recovery utilizing refrigeration and reflux from LNG plants112US 6,401,486 B12002
- Propane recovery methods75US 6,116,050 AIpsi LLC · 2000
- Autorefrigeration separation of carbon dioxide59US 6,301,927 B12001
- Process to separate nitrogen from natural gas53US 4,415,345 AUnion Carbide Corporation · 1983