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HUGHES MITCHELL PROCESSES INC

Overview
  • Total Patents
    38
About

HUGHES MITCHELL PROCESSES INC has a total of 38 patent applications. Its first patent ever was published in 1931. It filed its patents most often in United States, Germany and Canada. Its main competitors in its focus markets materials and metallurgy, environmental technology and basic materials chemistry are POSEIDON NICKEL LTD, VALE DO RIO DOCE CO and CHONGQING DONGQUN TECH CO LTD.

Patent filings in countries

World map showing HUGHES MITCHELL PROCESSES INCs patent filings in countries
# Country Total Patents
#1 United States 34
#2 Germany 2
#3 Canada 1
#4 United Kingdom 1

Patent filings per year

Chart showing HUGHES MITCHELL PROCESSES INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Mitchell Thomas A 26
#2 Sessions Royal L 16
#3 Mitchell Donald C 1
#4 Dalton Robert J 1
#5 Austin Mitchell Thomas 1

Latest patents

Publication Filing date Title
US2094277A Method of sulphating the ore metal values of a sulphide ore
US2144299A Method of making zinc carbonate and zinc oxide
US2121887A Method of sulphating an ore material
US2109755A Method of making lead compounds
US2067778A Method of treating complex lead bearing ore materials
US2094276A Method of making lead oxide
US2068690A Method of recovering compounds from zinc and lead ores
US2134528A Treatment of lead bearing cres and the preparation of compounds therefrom
US2091797A Method of making white lead pigment
US2085114A Method of treating an ore material
US2039331A Method of treating a zinc bearing ore material
US2094275A Method of treating an ore material
US2070213A Method of making white lead pigment
GB445861A Improvements in and relating to the treatment of ores
US2082032A White lead pigment and method of making the same
US2045092A Method of chloridizing ore materials
US2055613A Method of chloridizing ore materials
US2054226A Method of treating lead sulphide ores
US2051962A Apparatus for treating granular material with a reagent gas
US2015687A Ore treatment apparatus