Inventor · disambiguated record
David R. Parrish
Also filed as: HAJOS ZOLTAN G · HAJOS ZOLTAN GEORGE · PARRISH DAVID R · PARRISH DAVID RICHARD
17 granted patents·415 citations·filing 1970–1985
94Inventor score
Top patents by PatentIndex Score
17 records- 0196US4344486AMethod for enhanced oil recoverySTANDARD OIL CO INDIANA·Filed 1981·Granted Aug 17, 1982·208 cites·12 claims
- 0296US3947473AAntioxidant chroman compoundsHOFFMANN LA ROCHE·Filed 1973·Granted Mar 30, 1976·38 cites·5 claims
- 0395US4026907AAntioxidant chroman compoundsHOFFMANN LA ROCHE·Filed 1975·Granted May 31, 1977·39 cites·2 claims
- 0492US4003919AAntioxidant chroman compoundsHOFFMANN LA ROCHE·Filed 1975·Granted Jan 18, 1977·27 cites·5 claims
- 0585US4055399ATracers in predetermined concentration ratiosSTANDARD OIL CO INDIANA·Filed 1976·Granted Oct 25, 1977·56 cites·3 claims
- 0675US4018799AAntioxidant chroman compoundsHOFFMANN LA ROCHE·Filed 1975·Granted Apr 19, 1977·15 cites·3 claims
- 0759US4105696AAsymmetric synthesis of organic compoundsHOFFMANN LA ROCHE·Filed 1976·Granted Aug 8, 1978·3 cites·26 claims
- 0854US4150031AHydroxy methyl carbazole acetic acid and estersHOFFMANN LA ROCHE·Filed 1978·Granted Apr 17, 1979·4 cites·2 claims
- 0952US4178289ACarbazole acetic acid derivativesHOFFMANN LA ROCHE·Filed 1979·Granted Dec 11, 1979·2 cites·9 claims
- 1051US3975442A2-Alkyl-2-(3-oxoalkyl)-1,3-cyclopentadionesHOFFMANN LA ROCHE·Filed 1974·Granted Aug 17, 1976·3 cites·4 claims
- 1140US3975440AAsymmetric synthesis of organic compoundsHOFFMANN LA ROCHE·Filed 1970·Granted Aug 17, 1976·1 cites·7 claims
- 1239US4431055AMethod for selective plugging of depleted channels or zones in in situ oil shale retortsSTANDARD OIL CO INDIANA·Filed 1981·Granted Feb 14, 1984·10 cites·4 claims
- 1335US4189447ASubstituted-hydroxytetrahydroindanonesHOFFMANN LA ROCHE·Filed 1978·Granted Feb 19, 1980·0 cites·2 claims
- 1435US4110380AAsymmetric synthesis of organic compoundsHOFFMANN LA ROCHE·Filed 1976·Granted Aug 29, 1978·0 cites·3 claims
- 1535US4108898AAsymmetric synthesis of organic compoundsHOFFMANN LA ROCHE·Filed 1976·Granted Aug 22, 1978·0 cites·2 claims
- 1635US4102929AAsymmetric synthesis of organic compoundsHOFFMANN LA ROCHE·Filed 1976·Granted Jul 25, 1978·0 cites·3 claims
- 1730US4648450AMethod of producing synthesis gas by underground gasification of coal using specific well configurationAMOCO CORP·Filed 1985·Granted Mar 10, 1987·9 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →