F25J 1/0257
Construction and layout of liquefaction equipments
Official title: {Construction and layout of liquefaction equipments, e.g. valves, machines (F25J1/0279 takes precedence)}
F25J1/0257 (Construction and layout of liquefaction equipments) appears on 763 US grants and 937 published applications in this corpus.
Search patents in F25J- Granted patents
- 763
- Published applications
- 937
- Assignees
- 340
- Inventors
- 1,596
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 12 | 0 |
| 1978 | 4 | 0 |
| 1979 | 8 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 8 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 9 | 0 |
| 1986 | 7 | 0 |
| 1987 | 8 | 0 |
| 1988 | 7 | 0 |
| 1989 | 8 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 13 | 0 |
| 1998 | 8 | 0 |
| 1999 | 6 | 0 |
| 2000 | 16 | 0 |
| 2001 | 16 | 4 |
| 2002 | 15 | 3 |
| 2003 | 17 | 13 |
| 2004 | 9 | 11 |
| 2005 | 8 | 14 |
| 2006 | 9 | 25 |
| 2007 | 15 | 19 |
| 2008 | 11 | 22 |
| 2009 | 19 | 34 |
| 2010 | 6 | 50 |
| 2011 | 8 | 24 |
| 2012 | 7 | 28 |
| 2013 | 12 | 33 |
| 2014 | 15 | 42 |
| 2015 | 9 | 38 |
| 2016 | 18 | 46 |
| 2017 | 39 | 47 |
| 2018 | 37 | 64 |
| 2019 | 33 | 66 |
| 2020 | 46 | 51 |
| 2021 | 28 | 53 |
| 2022 | 51 | 55 |
| 2023 | 35 | 56 |
| 2024 | 54 | 62 |
| 2025 | 33 | 36 |
| 2026 | 32 | 41 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F25J 1/0262Details of the cold heat exchange system369
- F25J 1/0275Adapted for special use of the liquefaction unit351
- F25J 1/0269Arrangement of liquefaction units or equipments fulfilling the same process step101
- F25J 1/0259Modularity and arrangement of parts of the liquefaction unit and in particular80
- F25J 1/0274Retrofitting or revamping of an existing liquefaction unit41
- F25J 1/0258Vertical layout of the equipments within in the cold box35
- F25J 1/0261Details of cold box insulation, housing and internal structure30
Recent patents
- Single mixed refrigerant LNG production process22 Sep 2026US 12,742,588 B2Honeywell Lng LLC
- Hydrogen liquefaction system and hydrogen liquefaction method15 Sep 2026US 12,736,279 B2H2CREO Corp.
- Method for generating refrigeration for a carbon monoxide cold box15 Sep 2026US 12,736,281 B2Praxair Technology, Inc.
- Method and a relative apparatus for producing liquified gases8 Sep 2026US 12,729,906 B2Fpt Industrial S.P.A.
- Power generation process utilizing fuel, liquid air and/or oxygen with zero CO2 emissions25 Aug 2026US 12,716,650 B2Saipem S.P.A.
- 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.
- Cryogenic cooling system3 Sep 2026US 2026/0257609 A1
- Turbomachine27 Aug 2026US 2026/0251078 A1Kawasaki Jukogyo Kabushiki Kaisha
Most cited
By later US patents
- 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
- Enhanced NGL recovery utilizing refrigeration and reflux from LNG plants112US 6,401,486 B12002
- LNG production in cryogenic natural gas processing plants108US 5,615,561 AWilliams Field Services Company · 1997
- Variable load refrigeration system particularly for cryogenic temperatures102US 6,076,372 APraxair Technology, Inc. · 2000