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PRITCHARD & CO J F

Overview
  • Total Patents
    34
About

PRITCHARD & CO J F has a total of 34 patent applications. Its first patent ever was published in 1927. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets chemical engineering, machines and mechanical elements are CRYOPLANTS LTD, HANGZHOU HANGYANG CO LTD and AMERICAN MESSER CORP.

Patent filings in countries

World map showing PRITCHARD & CO J Fs patent filings in countries
# Country Total Patents
#1 United States 19
#2 Canada 12
#3 Germany 1
#4 Spain 1
#5 France 1

Patent filings per year

Chart showing PRITCHARD & CO J Fs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Johnson Karl E 4
#2 Swenson Leonard K 4
#3 Parrish Roger W 4
#4 Bodle William W 3
#5 Spangler Carl V 3
#6 Moore Robert D 2
#7 Arthur Martin Henry 2
#8 Deschner Walter W 2
#9 Joseph Wilson William 2
#10 Hopper Edward W 2

Latest patents

Publication Filing date Title
US4033735A Single mixed refrigerant, closed loop process for liquefying natural gas
US3975508A Method of prevention and removal of sulfur deposits from H2 S absorption equipment
US3501516A Method for production of methanol
US3529426A Liner for in-ground lng storage facility
US3393527A Method of fractionating natural gas to remove heavy hydrocarbons therefrom
US3282027A Pressure differential control apparatus and a method for adsorption
US3205639A Adsorption apparatus and method for drying gas streams having differential pressure control mechanism for vessels on adsorbing and desorbing cycles
FR1353126A Process for recovering monovalent cations from a pulp preparation waste liquor containing a monovalent cation sulphite
US3248278A Method of recovering monovalent cations from spent monovalent cation sulfite pulpingliquor
US3095265A Ion exchange process for recovery of monovalent ions from waste sulfite pulping liquor
US2712730A Method of and apparatus for storing gases
US2663626A Method of storing gases
US2582148A Method of recovering desirable liquefiable hydrocarbons
US2557171A Method of treating natural gas
US2596785A Method of enriching natural gas
US2535148A Method of storing natural gas
US2299920A Cooling tower
US2342421A Fan and fan blade structure
US2284981A Dehumidifying composition and method of preparing same
US1826912A Cooling tower