F25J 1/02
Requiring the use of refrigeration
Official title: requiring the use of refrigeration, e.g. of helium or hydrogen {; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process}
F25J1/02 (Requiring the use of refrigeration) appears on 1,329 US grants and 1,677 published applications in this corpus.
Search patents in F25J- Granted patents
- 1,329
- Published applications
- 1,677
- Assignees
- 525
- Inventors
- 2,570
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 15 | 0 |
| 1978 | 7 | 0 |
| 1979 | 10 | 0 |
| 1980 | 14 | 0 |
| 1981 | 9 | 0 |
| 1982 | 9 | 0 |
| 1983 | 7 | 0 |
| 1984 | 11 | 0 |
| 1985 | 11 | 0 |
| 1986 | 11 | 0 |
| 1987 | 16 | 0 |
| 1988 | 11 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 6 | 0 |
| 1992 | 11 | 0 |
| 1993 | 10 | 0 |
| 1994 | 10 | 0 |
| 1995 | 8 | 0 |
| 1996 | 14 | 0 |
| 1997 | 21 | 0 |
| 1998 | 20 | 0 |
| 1999 | 14 | 0 |
| 2000 | 30 | 0 |
| 2001 | 32 | 5 |
| 2002 | 32 | 5 |
| 2003 | 27 | 19 |
| 2004 | 21 | 27 |
| 2005 | 14 | 29 |
| 2006 | 20 | 40 |
| 2007 | 25 | 29 |
| 2008 | 14 | 39 |
| 2009 | 30 | 67 |
| 2010 | 8 | 75 |
| 2011 | 14 | 57 |
| 2012 | 14 | 52 |
| 2013 | 23 | 59 |
| 2014 | 26 | 70 |
| 2015 | 18 | 75 |
| 2016 | 30 | 78 |
| 2017 | 58 | 93 |
| 2018 | 56 | 116 |
| 2019 | 68 | 107 |
| 2020 | 90 | 88 |
| 2021 | 55 | 93 |
| 2022 | 79 | 106 |
| 2023 | 69 | 101 |
| 2024 | 84 | 106 |
| 2025 | 58 | 72 |
| 2026 | 56 | 69 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F25J 1/0243Start-up or control of the process1,133
- F25J 1/0228Coupling of the liquefaction unit to other units or processes, so-called integrated478
- F25J 1/0211Using a multi-component refrigerant [mcr] fluid in a closed vapor compression cycle397
- F25J 1/0203Using a single-component refrigerant [scr] fluid in a closed vapor compression cycle339
- F25J 1/0221Using the cold stored in an external cryogenic component in an open195
- F25J 1/0201Using only internal refrigeration means, i.e. without external refrigeration188
- F25J 1/0225Using other external refrigeration means not provided before89
Recent patents
- Hydrogen liquefaction system and hydrogen liquefaction method29 Sep 2026US 12,747,911 B2H2CREO Corp.
- Single mixed refrigerant LNG production process22 Sep 2026US 12,742,588 B2Honeywell Lng LLC
- Liquefied hydrogen production device22 Sep 2026US 12,742,590 B2Jgc Corporation
- Hydrogen liquefaction system and hydrogen liquefaction method15 Sep 2026US 12,736,279 B2H2CREO Corp.
- System and method for co-production of a densified liquid oxygen product and densified liquid methane product15 Sep 2026US 12,736,280 B2Praxair Technology, Inc.
- Fluid cooling plant and refrigerant module thereof8 Oct 2026US 2026/0309376 A1Nuovo Pignone Tecnologie Srl
- Method for supplying gaseous nitrogen and liquefying nitrogen8 Oct 2026US 2026/0309410 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Cycle gas refrigerator and liquefaction facility1 Oct 2026US 2026/0298529 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- A method of and apparatus for reliquefying of boil-off gas stream obtained from liquefied gas in a gas storage of a floating storage unit24 Sep 2026US 2026/0287251 A1WäRtsilä Gas Solutions Norway AS
- Carbon dioxide reliquefaction system and carbon dioxide reliquefaction method which use closed cycle17 Sep 2026US 2026/0276299 A1Hanwha Ocean Co., Ltd.
Most cited
By later US patents
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- LNG production using dual independent expander refrigeration cycles149US 6,412,302 B1ABB Lummus Global, Inc. - Randall Division · 2002
- Process for liquefaction of natural gas137US 6,023,942 AExxon Production Research Company · 2000
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator136US 5,979,440 ASeQual Technologies, Inc. · 1999
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator133US 6,698,423 B1SeQual Technologies, Inc. · 2004