Prosecution Insights
Last updated: April 19, 2026

Examiner: PETTITT, JOHN F

Tech Center 3700 • Art Units: 3744 3763

This examiner grants 26% of resolved cases

Performance Statistics

25.7%
Allow Rate
-44.3% vs TC avg
757
Total Applications
+21.5%
Interview Lift
1841
Avg Prosecution Days
Based on 685 resolved cases, 2023–2026

Rejection Statute Breakdown

0.2%
§101 Eligibility
19.7%
§102 Novelty
43.5%
§103 Obviousness
35.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18826883 METHODS, COMPOSITIONS AND SYSTEMS FOR SOLID-STATE BAROCALORIC APPLICATIONS Final Rejection President and Fellows of Harvard College
18571120 SYSTEM FOR RECOVERING COMPRESSION ENERGY OF A GAS, LIQUEFIER COMPRISING SUCH A SYSTEM AND METHOD FOR RECOVERING COMPRESSION ENERGY OF A GAS Non-Final OA ARIANEGROUP SAS
18763212 CRYOPUMP AND CONTROL METHOD FOR CRYOPUMP Non-Final OA SUMITOMO HEAVY INDUSTRIES, LTD.
19182432 ETHANE RECOVERY SYSTEM SUITABLE FOR RICH GAS WITH HIGH CARBON DIOXIDE CONTENT AND RECOVERY METHOD THEREFOR Final Rejection Jiangsu Urban and Rural Construction Vocational College
17947426 SOLID-STATE REFRIGERATION APPARATUS Non-Final OA DAIKIN INDUSTRIES, LTD.
17757872 PROCESS AND PLANT FOR PROVISION OF OXYGEN PRODUCT Non-Final OA Linde GmbH
18324629 CRYOGENIC LIQUID WITHDRAWAL DEVICE AND SEALING RING Non-Final OA TOMCO2 SYSTEMS COMPANY
18411328 PROCESS AND APPARATUS FOR SEPARATING A MIXTURE OF HYDROGEN AND CARBON DIOXIDE Non-Final OA L'Air Liquide, Societe Anonyme pour l'Etude et l’Exploitation des Procedes Georges Claude
18218150 METHOD FOR REGULATING A DEVICE FOR SEPARATING AIR BY CRYOGENIC DISTILLATION Non-Final OA L'Air Liquide, Societe Anonyme pour l'Etude et l’Exploitation des Procedes Georges Claude
18164660 CRYOGENIC LIQUID TANK FOR AN AIRCRAFT AND METHOD FOR MANUFACTURING THE SAME Non-Final OA Airbus SAS
18571450 METHOD FOR OPERATING A REFRIGERATED VEHICLE, AND REFRIGERATED VEHICLE Final Rejection Messer SE & Co. KGaA
15012883 SELF-ADJUSTING CRYOGENIC FOOD FREEZER Non-Final OA Messer Industries USA, Inc.
18402961 METHOD FOR PRODUCTION AND SUPPLY OF A DENSIFIED LIQUID OXYGEN PRODUCT FOR SPACE VEHICLE APPLICATIONS Non-Final OA PRAXAIR TECHNOLOGY, INC.
18402058 SYSTEM AND METHOD FOR COMBINED LIQUEFACTION AND DENSIFICATION OF OXYGEN Non-Final OA PRAXAIR TECHNOLOGY, INC.
18402103 SYSTEM AND METHOD FOR DENSIFICATION OF LIQUID OXYGEN Non-Final OA PRAXAIR TECHNOLOGY, INC.
18334883 SYSTEM AND METHOD FOR GAS LIQUEFICATION Final Rejection PRAXAIR TECHNOLOGY, INC.
18716633 Method for liquefying a methane-rich gas to be processed, and corresponding facility Non-Final OA ENGIE
18023309 COMPRESSED NATURAL GAS (CNG) POWER SYSTEM WITH C02 EMISSIONS CAPTURE AND STORAGE Non-Final OA ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
18731281 SYSTEM AND METHOD FOR TREATING ASSOCIATED GAS Non-Final OA GTUIT, LLC
18405776 HYDROGEN LIQUEFACTION SYSTEM AND HYDROGEN LIQUEFACTION METHOD Non-Final OA H2CREO Corp.
15728014 Carbon Dioxide Capture from Flue Gas Non-Final OA Sustainable Energy Solutions, Inc.
18398897 SYSTEM AND PROCESS FOR NATURAL GAS LIQUEFACTION Final Rejection NuBlu Innovations, LLC
18530483 METHOD FOR PRESSURIZING A LIQUID EXITING A PHASE SEPARATOR Final Rejection Air Liquide Large Industries U.S. LP
18219808 SYSTEM AND METHOD FOR RECONDENSING BOIL-OFF GAS FROM A LIQUEFIED NATURAL GAS TANK Non-Final OA Honeywell LNG LLC
17464773 INTEGRATED NITROGEN REJECTION FOR LIQUEFACTION OF NATURAL GAS Non-Final OA HONEYWELL LNG LLC
18210413 PROCESS FOR CRYOGENIC SEPARATION OF A FEED STREAM CONTAINING METHANE AND AIR GASES, FACILITY FOR PRODUCING BIOMETHANE BY PURIFICATION OF BIOGASES DERIVED FROM NON-HAZARDOUS WASTE STORAGE FACILITIES (NHWSF) IMPLEMENTING THE PROCESS Non-Final OA WAGA ENERGY
18257093 LNG PROCESS USING FEEDSTOCK AS PRIMARY REFRIGERANT Final Rejection JL ENERGY TRANSPORTATION INC.
18321677 CRYOGENIC TANK FOR STORING H2 IN LIQUID FORM Final Rejection ACITURRI ENGINEERING S.L.
18317326 System and Method for Cooling Fluids Containing Hydrogen or Helium Non-Final OA Chart Energy & Chemicals, Inc.
16385269 Mixed Refrigerant Liquefaction System and Method with Pre-Cooling Final Rejection Chart Energy & Chemicals, Inc.

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