Inventor · disambiguated record
Douglas Hillshafer
Also filed as: HILLSHAFER DOUGLAS · HILLSHAFER DOUGLAS K · HILLSHAFER DOUGLAS KIP
9 granted patents·6 pending applications·118 citations·filing 1982–2023
87Inventor score
Top patents by PatentIndex Score
15 records- 0188US11898096B2Polyester diverting agents for low-temperature oil wellsSTEPAN CO·Filed 2020·Granted Feb 13, 2024·2 cites·8 claims
- 0285US4687788ADimensionally stable urethane elastomersDOW CHEMICAL CO·Filed 1983·Granted Aug 18, 1987·36 cites·14 claims
- 0384US6569352B1Phthalic anhydride based polyester-ether polyols and urethane prepolymers produced therefromSTEPAN CO·Filed 1999·Granted May 27, 2003·39 cites·7 claims
- 0476US12291673B2Polyester diverting agents for low-temperature oil wellsSTEPAN CO·Filed 2023·Granted May 6, 2025·0 cites·14 claims
- 0564US4868223AUse of amine initiated butylene oxide polyols in polyurethane productsDOW CHEMICAL CO·Filed 1988·Granted Sep 19, 1989·20 cites·27 claims
- 0657US9284518B2Multi-arm hydrophilic urethane polymers, methods of making them, and compositions and processes employing themSTEPAN CO·Filed 2013·Granted Mar 15, 2016·0 cites·20 claims
- 0754US4814411AIncreased reactivity of isocyanate terminated polyether prepolymers with metal halide salt complexes of methylenedianilineFIRESTONE TIRE & RUBBER CO·Filed 1988·Granted Mar 21, 1989·9 cites·33 claims
- 0854US2006135637A1Phthalic anhydride based polyester-ether polyols and double metal cyanide catalyst system for preparing sameHILLSHAFER DOUGLAS K·Filed 2005·Application pending·0 cites
- 0954US2006169948A1Liquid hardness agent for open cell foamsNEILL PAUL L·Filed 2006·Application pending·0 cites
- 1048US2008269367A1Prepolymer containing a Liquid Hardness Agent For Open Cell FoamsNEILL PAUL L·Filed 2006·Application pending·0 cites
- 1147US4478941AMethod for determining component ratios employed to prepare polymersDOW CHEMICAL CO·Filed 1982·Granted Oct 23, 1984·12 cites·6 claims
- 1247US2005085658A1Phthalic anhydride based polyester-ether polyols and double metal cyanide catalyst system for preparing sameFiled 2004·Application pending·0 cites
- 1344US2004259967A1Liquid hardness agent for open cell foamsFiled 2004·Application pending·0 cites
- 1443US9487467B2Method for producing ο-phthalate polyester polyols with low cyclic ester contentHILLSHAFER DOUGLAS·Filed 2012·Granted Nov 8, 2016·0 cites·14 claims
- 1543US2008108719A1Phthalic Anhydride Based Polyester-Ether Polyols and Double Metal Cyanide Catalyst System for Preparing SameGEIGER ERIC J·Filed 2007·Application pending·0 cites
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