F25J
Liquefaction, solidification or separation of gases or gaseous or liquefied gaseous mixtures
Official title: LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS {OR LIQUEFIED GASEOUS} MIXTURES BY PRESSURE AND COLD TREATMENT {OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE (cryogenic pumps F04B37/08; gas storage vessels, gas holders F17; filing vessels with, or discharging from vessels, compressed, liquefied or solidified gases F17C; refrigeration machines, plants, or systems F25B)}
F25J (Liquefaction, solidification or separation of gases or gaseous or liquefied gaseous mixtures) appears on 4,612 US grants and 4,454 published applications in this corpus.
Search patents in F25J- Granted patents
- 4,612
- Published applications
- 4,454
- Assignees
- 1,183
- Inventors
- 6,270
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 31 | 0 |
| 1977 | 40 | 0 |
| 1978 | 28 | 0 |
| 1979 | 32 | 0 |
| 1980 | 37 | 0 |
| 1981 | 44 | 0 |
| 1982 | 38 | 0 |
| 1983 | 37 | 0 |
| 1984 | 54 | 0 |
| 1985 | 54 | 0 |
| 1986 | 60 | 0 |
| 1987 | 78 | 0 |
| 1988 | 77 | 0 |
| 1989 | 55 | 0 |
| 1990 | 50 | 0 |
| 1991 | 47 | 0 |
| 1992 | 73 | 0 |
| 1993 | 66 | 0 |
| 1994 | 82 | 0 |
| 1995 | 97 | 0 |
| 1996 | 85 | 0 |
| 1997 | 118 | 0 |
| 1998 | 106 | 0 |
| 1999 | 128 | 0 |
| 2000 | 121 | 0 |
| 2001 | 159 | 29 |
| 2002 | 108 | 76 |
| 2003 | 110 | 78 |
| 2004 | 63 | 105 |
| 2005 | 54 | 86 |
| 2006 | 66 | 123 |
| 2007 | 75 | 97 |
| 2008 | 52 | 141 |
| 2009 | 67 | 161 |
| 2010 | 35 | 203 |
| 2011 | 53 | 166 |
| 2012 | 65 | 179 |
| 2013 | 84 | 209 |
| 2014 | 100 | 196 |
| 2015 | 107 | 217 |
| 2016 | 121 | 208 |
| 2017 | 172 | 225 |
| 2018 | 168 | 259 |
| 2019 | 206 | 247 |
| 2020 | 200 | 236 |
| 2021 | 153 | 214 |
| 2022 | 161 | 225 |
| 2023 | 153 | 219 |
| 2024 | 168 | 226 |
| 2025 | 147 | 171 |
| 2026 | 127 | 158 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F25J 3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous3,431
- F25J 2205/00Processes or apparatus using other separation and/or other processing meansIndexing code2,100
- F25J 2200/00Processes or apparatus using separation by rectificationIndexing code1,806
- F25J 2270/00Refrigeration techniques usedIndexing code1,604
- F25J 2210/00Processes characterised by the type or other details of the feed streamIndexing code1,600
- F25J 1/00Processes or apparatus for liquefying or solidifying gases or gaseous mixtures1,503
- F25J 2245/00Processes or apparatus involving steps for recycling of process streamsIndexing code1,392
- F25J 2290/00Liquefaction, solidification or separation of gases or gaseous or liquefied gaseous mixturesIndexing code1,324
All 17 main groupsShow fewer
- F25J 2215/00Processes characterised by the type or other details of the product streamIndexing code1,279
- F25J 2240/00Processes or apparatus involving steps for expanding of process streamsIndexing code1,210
- F25J 2230/00Processes or apparatus involving steps for increasing the pressure of gaseous processIndexing code1,166
- F25J 2220/00Processes or apparatus involving steps for the removal of impuritiesIndexing code1,087
- F25J 2235/00Processes or apparatus involving steps for increasing the pressure or for conveyingIndexing code756
- F25J 2250/00Details related to the use of reboiler-condensersIndexing code570
- F25J 2260/00Coupling of processes or apparatus to other unitsIndexing code454
- F25J 2280/00Control of the process or apparatusIndexing code394
- F25J 5/00Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants289
Recent patents
- Controllable injection for implementing different local refrigerant distribution6 Oct 2026US 12,753,975 B2Linde Aktiengesellschaft
- Hydrogen liquefaction system and hydrogen liquefaction method29 Sep 2026US 12,747,911 B2H2CREO Corp.
- Method for configuring a control system for a process plant29 Sep 2026US 12,747,912 B2Linde Aktiengesellschaft
- System for transforming a product22 Sep 2026US 12,742,521 B2Eifhytec
- Single mixed refrigerant LNG production process22 Sep 2026US 12,742,588 B2Honeywell Lng LLC
- Method and device for separating a carbon dioxide-containing gas by partial condensation and/or distillation and/or solidification8 Oct 2026US 2026/0306989 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- A hazardous fluid isolation system8 Oct 2026US 2026/0309284 A1Fabrum IP Holdings Limited
- Fluid cooling plant and refrigerant module thereof8 Oct 2026US 2026/0309376 A1Nuovo Pignone Tecnologie Srl
- Methods and systems for efficient pressurized liquefied natural gas (plng) production, delivery, and use across mobile and stationary applications8 Oct 2026US 2026/0309409 A1Cryosys, LLC
- 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
Most cited
By later US patents
- Hydrocarbon combustion power generation system with CO2 sequestration337US 6,389,814 B1Clean Energy Systems, Inc. · 2002
- Method for producing methane-containing gaseous mixtures305US 5,388,645 AAmoco Corporation · 1995
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- Method for recovering methane from a solid carbonaceous subterranean formation224US 5,566,755 AAmoco Corporation · 1996
- Hydrocarbon combustion power generation system with CO2 sequestration216US 7,043,920 B2Clean Energy Systems, Inc. · 2006