Inventor · disambiguated record
Ernest H. Purfurst
Also filed as: PURFURST ERNEST H
4 granted patents·216 citations·filing 1985–1988
81Inventor score
Top patents by PatentIndex Score
4 records- 0189US4745802AFormation testing tool and method of obtaining post-test drawdown and pressure readingsHALLIBURTON CO·Filed 1986·Granted May 24, 1988·116 cites·18 claims
- 0276US4843878AMethod and apparatus for instantaneously indicating permeability and horner plot slope relating to formation testingHALLIBURTON LOGGING SERVICES·Filed 1988·Granted Jul 4, 1989·53 cites·15 claims
- 0361US4593560APush-off pistonsHALLIBURTON CO·Filed 1985·Granted Jun 10, 1986·34 cites·8 claims
- 0444US4671322ASequential formation tester having three way normally closed valveHALLIBURTON CO·Filed 1985·Granted Jun 9, 1987·13 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →