Inventor · disambiguated record
William J. Trepka
Also filed as: SONNENFELD RICHARD J · TREPKA WILLIAM J
30 granted patents·1,396 citations·filing 1971–1997
98Inventor score
Files withPHILLIPS PETROLEUM CO30
Top patents by PatentIndex Score
30 records- 0197US5545690ATapered block copolymers of monovinylarenes and conjugated dienesPHILLIPS PETROLEUM CO·Filed 1995·Granted Aug 13, 1996·95 cites·5 claims
- 0297US4145298AHydrogenated lithiated copolymers grafted with organic nitrogen compounds as viscosity index improvers having dispersant propertiesPHILLIPS PETROLEUM CO·Filed 1977·Granted Mar 20, 1979·81 cites·52 claims
- 0396US6265485B1Tapered block copolymers of monovinylarenes and conjugated dienesPHILLIPS PETROLEUM CO·Filed 1997·Granted Jul 24, 2001·89 cites·20 claims
- 0496US5910546ATapered block copolymers of monivinylarenes and conjugated dienesPHILLIPS PETROLEUM CO·Filed 1997·Granted Jun 8, 1999·98 cites·21 claims
- 0596US5436298ABlock copolymers of monovinylarenes and conjugated dienes and preparation thereofPHILLIPS PETROLEUM CO·Filed 1994·Granted Jul 25, 1995·120 cites·18 claims
- 0695US5399628ABlock copolymers of monovinylarenes and conjugated dienes containing two interior tapered blocksPHILLIPS PETROLEUM CO·Filed 1993·Granted Mar 21, 1995·113 cites·25 claims
- 0795US5227419ATapered block styrene/butadiene copolymersPHILLIPS PETROLEUM CO·Filed 1990·Granted Jul 13, 1993·116 cites·44 claims
- 0895US5130377ATapered block styrene/butadiene copolymersPHILLIPS PETROLEUM CO·Filed 1991·Granted Jul 14, 1992·105 cites·22 claims
- 0994US4412087AViscosity index improver with high thickening powerPHILLIPS PETROLEUM CO·Filed 1981·Granted Oct 25, 1983·54 cites·22 claims
- 1093US5256736ATapered block copolymers of conjugated dienes and monovinylarenesPHILLIPS PETROLEUM CO·Filed 1991·Granted Oct 26, 1993·91 cites·17 claims
- 1190US4238202AHydrocarbon fuels with carburetor detergent propertiesPHILLIPS PETROLEUM CO·Filed 1979·Granted Dec 9, 1980·42 cites·46 claims
- 1290US4076915ATreatment of coupled polymers prior to hydrogenationPHILLIPS PETROLEUM CO·Filed 1976·Granted Feb 28, 1978·34 cites·26 claims
- 1389US6265484B1Tapered block copolymers of monovinylarenes and conjugated dienesPHILLIPS PETROLEUM CO·Filed 1997·Granted Jul 24, 2001·64 cites·25 claims
- 1489US5705569ABlock copolymers of monovinylarenes and conjugated dienes and preparation thereofPHILLIPS PETROLEUM CO·Filed 1996·Granted Jan 6, 1998·57 cites·18 claims
- 1584US5319033ATapered block monovinyl aromatic/conjugated diene copolymerPHILLIPS PETROLEUM CO·Filed 1992·Granted Jun 7, 1994·42 cites·11 claims
- 1683US4158098AOrgano lithium initiatorPHILLIPS PETROLEUM CO·Filed 1975·Granted Jun 12, 1979·21 cites·14 claims
- 1780US5587425ABlends of copolymers of monovinylarenes and conjugated dienes containing two interior tapered blocksPHILLIPS PETROLEUM CO·Filed 1995·Granted Dec 24, 1996·36 cites·14 claims
- 1877US4402844AViscosity index improvers with dispersant properties prepared by reaction of lithiated hydrogenated copolymers with substituted aminolactamsPHILLIPS PETROLEUM CO·Filed 1981·Granted Sep 6, 1983·24 cites·22 claims
- 1974US5270396ASequential coupling in formation of resinous block copolymersPHILLIPS PETROLEUM CO·Filed 1992·Granted Dec 14, 1993·19 cites·17 claims
- 2073US3931107APolyalkoxy monovinylaromatic compound in copolymerization of a conjugated diene with a monovinyl-substituted aromatic compoundPHILLIPS PETROLEUM CO·Filed 1973·Granted Jan 6, 1976·12 cites·35 claims
- 2172US4471099ATreatment of a hydrogenated polymer solution after hydrogenation catalyst removal to improve subsequent lithiation reactionPHILLIPS PETROLEUM CO·Filed 1983·Granted Sep 11, 1984·20 cites·12 claims
- 2257US4105714ACoupling of alkali metal-terminated polymersPHILLIPS PETROLEUM CO·Filed 1976·Granted Aug 8, 1978·13 cites·18 claims
- 2354US4418234AViscosity index improver soluble in synthetic poly(α-olefin) lubricantsPHILLIPS PETROLEUM CO·Filed 1981·Granted Nov 29, 1983·11 cites·15 claims
- 2451US5422389AMethod for stabilizing monovinylarene/conjugated diene copolymers and a method for preparing a stabilizing mixturePHILLIPS PETROLEUM CO·Filed 1994·Granted Jun 6, 1995·13 cites·34 claims
- 2548US4402843AViscosity index improvers with dispersant properties prepared by reaction of lithiated hydrogenated copolymers with 4-substituted aminopyridinesPHILLIPS PETROLEUM CO·Filed 1981·Granted Sep 6, 1983·5 cites·34 claims
- 2648US4238576AOrthoesters as coupling agents for producing novel polymersPHILLIPS PETROLEUM CO·Filed 1979·Granted Dec 9, 1980·5 cites·16 claims
- 2747US5384349AConjugated diene/monovinylarene copolymers and preparation thereofPHILLIPS PETROLEUM CO·Filed 1993·Granted Jan 24, 1995·6 cites·18 claims
- 2843US4086406ACoupling lithium-initiated polymer with a vinylhalomethylarenePHILLIPS PETROLEUM CO·Filed 1975·Granted Apr 25, 1978·3 cites·10 claims
- 2942US3948872APolymerization process for producing low cis-configuration homopolymersPHILLIPS PETROLEUM CO·Filed 1971·Granted Apr 6, 1976·4 cites·4 claims
- 3038US4297464AOrthoesters as coupling agents for producing monovinylarene homopolymersPHILLIPS PETROLEUM CO·Filed 1980·Granted Oct 27, 1981·3 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →