Topic leaderboard
Liquefaction or separation of gases
Ranked by the PatentIndex Score — a 1–99 percentile within F25J · public-visibility date · generated 2026-07-19
top 25 per window · public-visibility date
Rising· last 2 yrs
Inventors whose newest F25J patents became public in the last 2 years — the current frontier
- 199Yoshitsugi Kikkawa6 patents · 410 citations
- 296Donn Michael Herron34 patents · 748 citations
- 392Paul Higginbotham47 patents · 571 citations
- 488Christopher Michael Ott12 patents · 110 citations
- 583Gowri Krishnamurthy20 patents · 47 citations
- 679Joon Chae Lee15 patents · 37 citations
- 775Shawn D. Hoffart7 patents · 72 citations
- 871Larry Baxter30 patents · 66 citations
- 967William M. Conlon7 patents · 36 citations
- 1063Shukui Zhao13 patents · 29 citations
- 1158James Zhao12 patents · 27 citations
- 1254Jay Stephen Kaufman5 patents · 21 citations
- 1350Alex Brigden5 patents · 6 citations
- 1446Angus Remfry5 patents · 6 citations
- 1542Glen Cunial5 patents · 6 citations
- 1638Tom Boguslawski5 patents · 6 citations
- 1733Fabien Durand15 patents · 12 citations
- 1829Mathieu Leclerc11 patents · 7 citations
- 1925Dimitri Golubev15 patents · 7 citations
- 2021Mohammad Rafati3 patents · 16 citations
- 2117Annemarie Ott Weist6 patents · 6 citations
- 2213Qiao Zhao5 patents · 12 citations
- 238Giuseppe Sassanelli4 patents · 12 citations
- 244Ludovic Granados7 patents · 5 citations
- 251Terrence J. Ebert3 patents · 5 citations
Active· last 5 yrs
Sustained F25J output across the last 5 years
- 199Michael C. Pierce12 patents · 851 citations
- 296Henri Paradowski31 patents · 1,236 citations
- 392Miles R. Palmer14 patents · 489 citations
- 488Timothy Christopher Golden19 patents · 672 citations
- 583Yoshitsugi Kikkawa6 patents · 410 citations
- 679Donn Michael Herron34 patents · 748 citations
- 775Jarod Mccormick12 patents · 220 citations
- 871Joel Cizeron12 patents · 220 citations
- 967Greg Nyce10 patents · 198 citations
- 1063John Mak53 patents · 706 citations
- 1158Srinivas Vuddagiri9 patents · 191 citations
- 1254Declan Patrick O'Connor15 patents · 317 citations
- 1350Paul Higginbotham47 patents · 571 citations
- 1446Hitoshi Kihara12 patents · 250 citations
- 1542Aihua Zhang6 patents · 126 citations
- 1638Bipinkumar Patel6 patents · 126 citations
- 1733Carlos Faz6 patents · 126 citations
- 1829Peter Czerpak6 patents · 126 citations
- 1925Ron Runnebaum6 patents · 126 citations
- 2021Tim A. Rappold6 patents · 126 citations
- 2117William Michalak6 patents · 126 citations
- 2213David M. Espie7 patents · 217 citations
- 238Rayburn C. Butts17 patents · 226 citations
- 244William T. Kleinberg9 patents · 180 citations
- 251Adam Adrian Brostow22 patents · 209 citations
All-time canon
Career PatentIndex Score in F25J
- 199Fermin Viteri7 patents · 1,670 citations
- 296Graham Walker5 patents · 750 citations
- 392Scott C. Honkonen5 patents · 750 citations
- 488Roy E. Campbell16 patents · 2,774 citations
- 583Eugene R. Thomas7 patents · 1,112 citations
- 679Donald J. Victory11 patents · 714 citations
- 775Michael C. Pierce12 patents · 851 citations
- 871Ronald R. Bowen10 patents · 1,060 citations
- 967Jame Yao21 patents · 1,404 citations
- 1063Jong Juh Chen10 patents · 960 citations
- 1158Douglas G. Elliot9 patents · 957 citations
- 1254Eric T. Cole6 patents · 812 citations
- 1350Arun Acharya22 patents · 1,337 citations
- 1446Rong-Jwyn Lee11 patents · 833 citations
- 1542Harry Brandt4 patents · 1,145 citations
- 1638James Taylor4 patents · 1,145 citations
- 1733Eric William Scharpf11 patents · 742 citations
- 1829Jorge H. Foglietta16 patents · 983 citations
- 1925Walter Joseph Olszewski12 patents · 775 citations
- 2021Howard C. Rowles32 patents · 1,421 citations
- 2117Bayram Arman36 patents · 1,651 citations
- 2213Joseph Alfred Weber24 patents · 1,142 citations
- 238Henri Paradowski31 patents · 1,236 citations
- 244William R. Low11 patents · 839 citations
- 251Arthur Ramsden Smith13 patents · 815 citations
Rising· last 2 yrs
The top-scoring F25J patents made public in the last 2 years
- 199US12111103B2✦ AIMethods of manufacturing apparatus and systems for liquefaction of natural gas2 cites · 202450% earned
- 296US11946679B1✦ AIExhaust gas heat recovery from cryo-compression engines with cogeneration of cryo-working 3 cites · 202480% earned
- 392US12226735B1✦ AIIonized gas separation arrangement2 cites · 202576% earned
- 488US12338740B2Carbon capture system and method with recuperative power recovery1 cites · 202467% earned
- 583US12186699B1Cryogen chamber with adsorber1 cites · 202567% earned
- 679US12117131B2Boil-off gas reliquefaction system and method of discharging lubricant oil from boil-off g1 cites · 202456% earned
- 775US12055345B2Air separation unit and method for production of nitrogen and argon using a distillation c1 cites · 202467% earned
- 871US12492864B1Apparatus and process for liquefying gases1 cites · 202567% earned
- 967US12377383B2Systems and methods of renewable natural gas processing0 cites · 20250% earned
- 1063US12358852B2Catalysts and processes for the direct production of liquid fuels from carbon dioxide and 0 cites · 20240% earned
- 1158US12240758B2Systems and methods for production and separation of hydrogen and carbon dioxide0 cites · 20240% earned
- 1254US12385432B2Liquid air power and storage0 cites · 20240% earned
- 1350US12434251B1Electrostatic filtration arrangement0 cites · 20250% earned
- 1446US12163511B2Cooling arrangement and method for cooling an at least two-stage compressed air generator0 cites · 20240% earned
- 1542US12466730B2ATR-based hydrogen process and plant0 cites · 20250% earned
- 1638US12341408B2Hydroelectric energy systems and methods of manufacturing the same0 cites · 20240% earned
- 1733US12270603B2System and method for online gas analytical pressure-swing adsorption (PSA) control for la0 cites · 20240% earned
- 1829US12366407B2Advanced method of heavy hydrocarbon removal and natural gas liquefaction using closed-loo0 cites · 20240% earned
- 1925US12487029B2Method of reducing mercury in stabilized condensate0 cites · 20240% earned
- 2021US12516878B2Device and method for liquefying a fluid such as hydrogen and/or helium0 cites · 20240% earned
- 2117US12366408B2Open loop liquefaction process with NGL recovery0 cites · 20240% earned
- 2213US12474114B2Semi-open loop liquefaction process0 cites · 20240% earned
- 238US12480690B2Regenerator for a magnetic heat exchanger and heat exchanger0 cites · 20240% earned
- 244US12449196B2Cryocooler suitable for gas liquefaction applications, gas liquefaction system and method 0 cites · 20240% earned
- 251US12246805B2Offshore LNG processing facility0 cites · 20240% earned
Active· last 5 yrs
The top-scoring F25J patents of the last 5 years
- 199US10923788B1✦ AIDirected quench systems and components19 cites · 202185% earned
- 296US11067335B1✦ AIDevices, systems, facilities, and processes for liquefied natural gas production12 cites · 202182% earned
- 392US11614280B2✦ AIReforming system connected with a raw material gas vaporization system12 cites · 202188% earned
- 488US11635255B1Liquid or supercritical carbon dioxide capture from exhaust gas8 cites · 202386% earned
- 583US11391511B1Methods and systems for hydrogen liquefaction8 cites · 202286% earned
- 679US10968151B1System and process for recovering methane and carbon dioxide from biogas and reducing gree8 cites · 202173% earned
- 775US11827317B1Carbon dioxide transport and sequestration marine vessel4 cites · 202375% earned
- 871US11685658B2Producing carbon dioxide with waste heat6 cites · 202174% earned
- 967US11229879B2Alkali-based removal of chemical moieties from gas streams with chemical co-generation7 cites · 202175% earned
- 1063US11112174B1Devices, systems, facilities, and processes for liquefied natural gas production7 cites · 202179% earned
- 1158US11946679B1Exhaust gas heat recovery from cryo-compression engines with cogeneration of cryo-working 3 cites · 202480% earned
- 1254US12226735B1Ionized gas separation arrangement2 cites · 202576% earned
- 1350US11656612B2Method and apparatus for managing industrial gas production5 cites · 202384% earned
- 1446US11761705B2Natural gas letdown generator system and method3 cites · 202372% earned
- 1542US11780312B1Exhaust gas heat recovery from cryo-compression engines with cogeneration of cryo-working 3 cites · 202380% earned
- 1638US12163736B2Mixed refrigerant hydrogen liquefaction device and method of using same3 cites · 202380% earned
- 1733US11828224B1Electrical power producing device2 cites · 202367% earned
- 1829US11815295B2Refrigeration device and facility4 cites · 202282% earned
- 1925US11680746B2Process and plant for the production of liquid hydrogen4 cites · 202182% earned
- 2021US11391512B2Heat exchange system and method of assembly3 cites · 202167% earned
- 2117US11448459B1Cryogenic gas separator3 cites · 202280% earned
- 2213US10894929B1Natural gas liquids recovery process4 cites · 202175% earned
- 238US11959700B2Liquefaction apparatus, methods, and systems4 cites · 202159% earned
- 244US11927391B2Liquefaction of production gas2 cites · 202267% earned
- 251US12287144B2Hydrogen liquefaction system and method2 cites · 202267% earned
All-time canon
The defining F25J patents of the whole record
- 199US5724805A✦ AIPower plant with carbon dioxide capture and zero pollutant emissions449 cites · 199895% earned
- 296US6232352B1✦ AIMethanol plant retrofit for acetic acid manufacture433 cites · 200195% earned
- 392US6389814B2✦ AIHydrocarbon combustion power generation system with CO2 sequestration399 cites · 200188% earned
- 488US5388645AMethod for producing methane-containing gaseous mixtures365 cites · 199594% earned
- 583US4434613AClosed cycle gas turbine for gaseous production336 cites · 198494% earned
- 679US6170264B1Hydrocarbon combustion power generation system with CO2 sequestration305 cites · 200188% earned
- 775US6148602ASolid-fueled power generation system with carbon dioxide sequestration and method therefor277 cites · 200094% earned
- 871US6023942AProcess for liquefaction of natural gas261 cites · 200094% earned
- 967US5615561ALNG production in cryogenic natural gas processing plants258 cites · 199794% earned
- 1063US6498685B1Maskless, microlens EUV lithography system252 cites · 200294% earned
- 1158US7043920B2Hydrocarbon combustion power generation system with CO2 sequestration249 cites · 200487% earned
- 1254US6487863B1Method and apparatus for cooling high temperature components in a gas turbine247 cites · 200294% earned
- 1350US5566755AMethod for recovering methane from a solid carbonaceous subterranean formation245 cites · 199691% earned
- 1446US6401486B1Enhanced NGL recovery utilizing refrigeration and reflux from LNG plants240 cites · 200294% earned
- 1542US4734115ALow pressure process for C3+ liquids recovery from process product gas234 cites · 198894% earned
- 1638US5568737AHydrocarbon gas processing230 cites · 199694% earned
- 1733US6412302B1LNG production using dual independent expander refrigeration cycles225 cites · 200294% earned
- 1829US6182469B1Hydrocarbon gas processing223 cites · 200194% earned
- 1925US6248794B1Integrated process for converting hydrocarbon gas to liquids214 cites · 200194% earned
- 2021US5680764AClean air engines transportation and other power applications212 cites · 199794% earned
- 2117US5956971AProcess for liquefying a natural gas stream containing at least one freezable component212 cites · 199994% earned
- 2213US5979440AMethods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator210 cites · 199986% earned
- 238US4344486AMethod for enhanced oil recovery208 cites · 198294% earned
- 244US6202574B1Combustion method and apparatus for producing a carbon dioxide end product205 cites · 200194% earned
- 251US5890378AHydrocarbon gas processing204 cites · 199994% earned
Rising· last 2 yrs
Assignees whose newest F25J patents became public in the last 2 years — the current frontier
- 199AIR PROD & CHEM431 patents · 13,657 citations
- 296AIR LIQUIDE494 patents · 5,761 citations
- 392HITACHI LTD17 patents · 324 citations
- 4888 RIVERS CAPITAL LLC20 patents · 191 citations
- 583SAUDI ARABIAN OIL CO60 patents · 105 citations
- 679DAEWOO SHIPBUILDING & MARINE26 patents · 90 citations
- 775ENFLEX INC12 patents · 27 citations
- 871MITSUBISHI HEAVY IND LTD7 patents · 48 citations
- 967WM INTELLECTUAL PROPERTY HOLDINGS L L C5 patents · 21 citations
- 1063KAUFMAN JAY STEPHEN5 patents · 21 citations
- 1158STEELHEAD LNG ASLNG LTD5 patents · 6 citations
- 1254SUSTAINABLE ENERGY SOLUTIONS INC10 patents · 9 citations
- 1350CHEVRON USA INC4 patents · 12 citations
- 1446HYUNDAI MOTOR CO LTD6 patents · 14 citations
- 1542ROLLS ROYCE PLC3 patents · 15 citations
- 1638HIGHVIEW ENTPR LTD6 patents · 5 citations
- 1733SALVINO CHRIS3 patents · 3 citations
- 1829STORECO2 UK LTD2 patents · 4 citations
- 1925ALCHEMY CO2 PBC3 patents · 0 citations
- 2021STAMICARBON2 patents · 6 citations
- 2117HALDOR TOPSOE AS3 patents · 1 citations
- 2213LINDE GMBH20 patents · 1 citations
- 238GAZTRANSPORT ET TECHNIGAZ4 patents · 1 citations
- 244SOUTHWEST RES INST3 patents · 1 citations
- 251SAPPHIRE TECH INC2 patents · 2 citations
Active· last 5 yrs
Sustained F25J output across the last 5 years
- 199AIR PROD & CHEM431 patents · 13,657 citations
- 296SHELL OIL CO38 patents · 1,010 citations
- 392AIR LIQUIDE494 patents · 5,761 citations
- 488LINDE AG212 patents · 3,819 citations
- 583CONOCOPHILLIPS CO42 patents · 641 citations
- 679KOBE STEEL LTD19 patents · 393 citations
- 775FLUOR TECH CORP36 patents · 292 citations
- 871HITACHI LTD17 patents · 324 citations
- 967LUMMUS TECHNOLOGY INC26 patents · 120 citations
- 10638 RIVERS CAPITAL LLC20 patents · 191 citations
- 1158SAUDI ARABIAN OIL CO60 patents · 105 citations
- 1254TECHNIP FRANCE18 patents · 114 citations
- 1350DAEWOO SHIPBUILDING & MARINE26 patents · 90 citations
- 1446TAIYO NIPPON SANSO CORP16 patents · 62 citations
- 1542UOP LLC35 patents · 50 citations
- 1638SAMSUNG ELECTRONICS CO LTD5 patents · 40 citations
- 1733ENFLEX INC12 patents · 27 citations
- 1829HOWARD HENRY EDWARD16 patents · 30 citations
- 1925CHART ENERGY & CHEMICALS INC27 patents · 23 citations
- 2021MITSUBISHI HEAVY IND LTD7 patents · 48 citations
- 2117WM INTELLECTUAL PROPERTY HOLDINGS L L C5 patents · 21 citations
- 2213TOYO ENGINEERING CORP6 patents · 46 citations
- 238JGC CORP16 patents · 33 citations
- 244KAUFMAN JAY STEPHEN5 patents · 21 citations
- 251STEELHEAD LNG ASLNG LTD5 patents · 6 citations
All-time canon
All-time PatentIndex Score in F25J
- 199CLEAN ENERGY SYSTEMS INC7 patents · 1,670 citations
- 296ELCOR CORP13 patents · 2,292 citations
- 392AIR PROD & CHEM431 patents · 13,657 citations
- 488SHELL OIL CO38 patents · 1,010 citations
- 583EXXON PRODUCTION RESEARCH CO14 patents · 1,696 citations
- 679ORTLOFF CORP5 patents · 883 citations
- 775PRAXAIR TECHNOLOGY INC264 patents · 6,720 citations
- 871AIR LIQUIDE494 patents · 5,761 citations
- 967EXXONMOBIL UPSTREAM RES CO34 patents · 1,217 citations
- 1063KOCH PROCESS SYSTEMS INC8 patents · 758 citations
- 1158BOC GROUP INC101 patents · 2,847 citations
- 1254ELK CORP6 patents · 495 citations
- 1350TECHNIP CIE13 patents · 895 citations
- 1446UNION CARBIDE CORP61 patents · 2,274 citations
- 1542TEXACO INC8 patents · 616 citations
- 1638PHILLIPS PETROLEUM CO48 patents · 1,972 citations
- 1733LINDE AG212 patents · 3,819 citations
- 1829STANDARD OIL CO INDIANA6 patents · 551 citations
- 1925ORTLOFF ENGINEERS LTD19 patents · 547 citations
- 2021SEQUAL TECHNOLOGIES INC4 patents · 719 citations
- 2117KELLOGG M W CO12 patents · 668 citations
- 2213INST FRANCAIS DU PETROLE16 patents · 716 citations
- 238CHIYODA CHEM ENG CONSTRUCT CO7 patents · 429 citations
- 244SILURIA TECHNOLOGIES INC11 patents · 366 citations
- 251CONOCOPHILLIPS CO42 patents · 641 citations
90–99 field-defining50–89 strong<50 emergingearned by citationsfrom family breadth