Inventor · disambiguated record
John K. Litchfield
Also filed as: LITCHFIELD JOHN K · PEMSLER J PAUL
9 granted patents·131 citations·filing 1974–1994
88Inventor score
Top patents by PatentIndex Score
9 records- 0188US5495979AMetal-bonded, carbon fiber-reinforced compositesSURMET CORP·Filed 1994·Granted Mar 5, 1996·65 cites·26 claims
- 0270US4211753ARecovery of molybdenum values from dilute solutionsKENNECOTT COPPER CORP·Filed 1978·Granted Jul 8, 1980·13 cites·12 claims
- 0369US4005173ASteam stripping of ammoniacal solutions and simultaneous loading of metal values by organic acidsKENNECOTT COPPER CORP·Filed 1975·Granted Jan 25, 1977·13 cites·18 claims
- 0468US3950487ASolvent-in-pulp extraction of copper and nickel from ammoniacal leach slurriesKENNECOTT COPPER CORP·Filed 1974·Granted Apr 13, 1976·12 cites·16 claims
- 0560US5151262APyrite cathode material for a thermal batteryUS NAVY·Filed 1991·Granted Sep 29, 1992·13 cites·13 claims
- 0654US4197117ARecovery of copper by ferrous ion precipitationKENNECOTT COPPER CORP·Filed 1978·Granted Apr 8, 1980·8 cites·6 claims
- 0740US4248837ASolvent extraction of copper, nickel with methyl hexyl dioximeKENNECOTT COPPER CORP·Filed 1979·Granted Feb 3, 1981·4 cites·2 claims
- 0832US4339348ADioxime ion exchangersKENNECOTT CORP·Filed 1980·Granted Jul 13, 1982·2 cites·4 claims
- 0930US4301124ACobalt solvent extraction with dioxime ion exchangersKENNECOTT CORP·Filed 1980·Granted Nov 17, 1981·1 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →