Inventor · disambiguated record
David James Schreck
Also filed as: SCHRECK DAVID J · SCHRECK DAVID JAMES
59 granted patents·10 pending applications·1,478 citations·filing 1980–2025
99Inventor score
Files withUNIVATION TECH LLC22UNION CARBIDE CHEM PLASTIC17IOWA CORN PROMOTION BOARD10BEST EN INC4T EN PROCESS TECH INC4
Top patents by PatentIndex Score
69 records- 0198US6894128B2Catalyst composition, method of polymerization, and polymer therefromUNIVATION TECH LLC·Filed 2003·Granted May 17, 2005·106 cites·18 claims
- 0298US6841631B2Catalyst composition, method of polymerization, and polymer therefromUNIVATION TECH LLC·Filed 2003·Granted Jan 11, 2005·107 cites·46 claims
- 0398US6340730B1Multiple catalyst systemUNIVATION TECH LLC·Filed 1999·Granted Jan 22, 2002·187 cites·27 claims
- 0498US6274684B1Catalyst composition, method of polymerization, and polymer therefromUNIVATION TECH LLC·Filed 1999·Granted Aug 14, 2001·213 cites·21 claims
- 0598US4399305AProduction of ethylene by the pyrolysis of ethyl acetateUNION CARBIDE CORP·Filed 1982·Granted Aug 16, 1983·98 cites·4 claims
- 0697US6534604B2Catalyst composition, method of polymerization, and polymer therefromUNIVATION TECH LLC·Filed 2001·Granted Mar 18, 2003·58 cites·15 claims
- 0796US6656866B2Catalyst preparation methodUNIVATION TECH LLC·Filed 2000·Granted Dec 2, 2003·57 cites·24 claims
- 0895US11319269B2Continuous processes for the selective conversion of aldohexose-yielding carbohydrate to ethylene glycol using low concentrations of retro-aldol catalystIOWA CORN PROMOTION BOARD·Filed 2020·Granted May 3, 2022·3 cites·30 claims
- 0995US4421939AProduction of ethanol from acetic acidUNION CARBIDE CORP·Filed 1982·Granted Dec 20, 1983·210 cites·6 claims
- 1094US10544072B2Continuous processes for the highly selective conversion of aldohexose-yielding carbohydrate to ethylene glycolIOWA CORN PROMOTION BOARD·Filed 2017·Granted Jan 28, 2020·6 cites·19 claims
- 1194US9399610B2Process for the continuous production of ethylene glycol from carbohydratesIOWA CORN PROMOTION BOARD·Filed 2015·Granted Jul 26, 2016·6 cites·7 claims
- 1293US7754840B2Bimodal high density polyethlyeneUNIVATION TECH LLC·Filed 2003·Granted Jul 13, 2010·31 cites·17 claims
- 1390US6399722B1Solution feed of multiple catalystsUNIVATION TECH LLC·Filed 1999·Granted Jun 4, 2002·59 cites·15 claims
- 1488US9783472B2Process for the continuous production of ethylene glycol from carbohydratesIOWA CORN PROMOTION BOARD·Filed 2016·Granted Oct 10, 2017·3 cites·20 claims
- 1586US6586544B2Solution feed of multiple catalystsUNIVATION TECH LLC·Filed 2002·Granted Jul 1, 2003·23 cites·10 claims
- 1686US5281751ASynergistic production of carboxylic acids from alcoholsUNION CARBIDE CHEM PLASTIC·Filed 1992·Granted Jan 25, 1994·24 cites·17 claims
- 1785US6982236B2Process to polymerize olefinsUNIVATION TECH LLC·Filed 2003·Granted Jan 3, 2006·17 cites·12 claims
- 1885US5225600AAmines catalysis using group VIB metal-containing condensation catalystsUNION CARBIDE CHEM PLASTIC·Filed 1992·Granted Jul 6, 1993·24 cites·35 claims
- 1984US6566462B2Multiple catalyst systemUNIVATION TECH LLC·Filed 2001·Granted May 20, 2003·13 cites·18 claims
- 2083US7384884B2Catalyst preparation methodUNIVATION TECH LLC·Filed 2005·Granted Jun 10, 2008·4 cites·10 claims
- 2182US5912202AOlefin polymerization catalyst composition having increased activityUNION CARBIDE CHEM PLASTIC·Filed 1997·Granted Jun 15, 1999·38 cites·6 claims
- 2280US12077489B2Continuous, carbohydrate to ethylene glycol processesT EN PROCESS TECH INC·Filed 2022·Granted Sep 3, 2024·0 cites·20 claims
- 2380US10472310B2Continuous processes for the highly selective conversion of sugars to propylene glycol or mixtures of propylene glycol and ethylene glycolIOWA CORN PROMOTION BOARD·Filed 2017·Granted Nov 12, 2019·1 cites·16 claims
- 2479US6713573B2Catalyst modifiers and their use in the polymerization of olefin(s)UNIVATION TECH LLC·Filed 2000·Granted Mar 30, 2004·13 cites·13 claims
- 2578USRE41897ECatalyst composition, method of polymerization, and polymer therefromUNIVATION TECH LLC·Filed 2004·Granted Oct 26, 2010·9 cites·21 claims
- 2678US6346584B1Catalyst modifiers and their use in the polymerization of olefins(s)UNIVATION TECH LLC·Filed 1999·Granted Feb 12, 2002·25 cites·26 claims
- 2774US6897273B2Catalyst composition, method of polymerization and polymer therefromUNIVATION TECH LLC·Filed 2000·Granted May 24, 2005·10 cites·27 claims
- 2874US5210306APromoted amines catalysisUNION CARBIDE CHEM PLASTIC·Filed 1989·Granted May 11, 1993·11 cites·39 claims
- 2973US8088957B2Conversion of a multihydroxylated-aliphatic hydrocarbon or ester thereof to a chlorohydrinKRUPER JR WILLIAM J·Filed 2005·Granted Jan 3, 2012·1 cites·39 claims
- 3073US5202490AProcess for thr manufacture of diethylenetriamine and aminoethylethanolamineUNION CARBIDE CHEM PLASTIC·Filed 1990·Granted Apr 13, 1993·13 cites·4 claims
- 3173US5196588AEthylenediamine and diethylenetriamine producers composition and method for producing sameUNION CARBIDE CHEM PLASTIC·Filed 1990·Granted Mar 23, 1993·13 cites·8 claims
- 3272US11319268B2Continuous, carbohydrate to ethylene glycol processesIOWA CORN PROMOTION BOARD·Filed 2020·Granted May 3, 2022·0 cites·20 claims
- 3372US10975010B2Continuous processes for the highly selective conversion of aldohexose-yielding carbohydrate to ethylene glycolIOWA CORN PROMOTION BOARD·Filed 2019·Granted Apr 13, 2021·0 cites·15 claims
- 3471US11919840B2Methods for operating continuous, unmodulated, multiple catalytic step processesT EN PROCESS TECH INC·Filed 2020·Granted Mar 5, 2024·0 cites·18 claims
- 3571US11655200B2Continuous processes for the selective conversion of aldohexose-yielding carbohydrate to ethylene glycol using low concentrations of retro-aldol catalystT EN PROCESS TECH INC·Filed 2021·Granted May 23, 2023·0 cites·27 claims
- 3671US6632769B2Catalyst modifier and its use in the polymerization of olefin(s)UNIVATION TECH LLC·Filed 2002·Granted Oct 14, 2003·8 cites·28 claims
- 3770US10988426B2Continuous processes for the highly selective conversion of aldohexose-yielding carbohydrate to ethylene glycolIOWA CORN PROMOTION BOARD·Filed 2019·Granted Apr 27, 2021·0 cites·16 claims
- 3869US8236975B2Process for the conversion of a crude glycerol, crude mixtures of naturally derived multicomponent aliphatic hydrocarbons or esters thereof to a chlorohydrinHOOK BRUCE D·Filed 2011·Granted Aug 7, 2012·1 cites·43 claims
- 3967US9120806B2Dianhydrosugar production processSCHRECK DAVID JAMES·Filed 2009·Granted Sep 1, 2015·1 cites·15 claims
- 4064US2021087129A1Process for making ethylene glycol and/or propylene glycol from aldose- and/or ketose-yielding carbohydrates with ex situ hydrogenolysis or hydrogenation catalyst treatmentIOWA CORN PROMOTION BOARD·Filed 2020·Application pending·0 cites
- 4164US2021087128A1Process with integrated recycle for making ethylene glycol and/or propylene glycol from aldose- and/or ketose- yielding carbohydratesIOWA CORN PROMOTION BOARD·Filed 2020·Application pending·0 cites
- 4263US6897269B2Processes for transitioning between Ziegler-Natta and alumoxane-based single-site polymerization catalystsUNIVATION TECH LLC·Filed 2003·Granted May 24, 2005·5 cites·18 claims
- 4362US4983736AAmines catalysis using metallic polyphosphate condensation catalysts having a condensed structureUNION CARBIDE CHEM PLASTIC·Filed 1989·Granted Jan 8, 1991·16 cites·92 claims
- 4459US11680031B2Continuous processes for the selective conversion of aldohexose-yielding carbohydrate to ethylene glycol using low concentrations of retro-aldol catalystT EN PROCESS TECH INC·Filed 2022·Granted Jun 20, 2023·0 cites·18 claims
- 4559US2025276951A1Processes for making vinyl acetate from ethylene glycol diacetateNEW PRODUCT INNOVATION LLC·Filed 2025·Application pending·0 cites
- 4657US7910781B2Process for the conversion of a crude glycerol, crude mixtures of naturally derived multihydroxylated aliphatic hydrocarbons or esters thereof to a chlorohydrinDOW GLOBAL TECHNOLOGIES LLC·Filed 2007·Granted Mar 22, 2011·0 cites·48 claims
- 4756US6972270B2Catalyst modifiers and their use in the polymerization of olefin(s)UNIVATION TECH LLC·Filed 2001·Granted Dec 6, 2005·2 cites·13 claims
- 4853US6166154AOlefin polymerization catalyst composition having increased activityUNION CARBIDE CHEM PLASTIC·Filed 1999·Granted Dec 26, 2000·15 cites·6 claims
- 4953US2008110082A1Biodiesel production with enhanced alkanol recoveryMALISZEWSKI THOMAS A·Filed 2007·Application pending·0 cites
- 5051US6960549B2Catalyst modifiers and their use in the polymerization of olefin(s)UNIVATION TECH LLC·Filed 2001·Granted Nov 1, 2005·1 cites·12 claims
Showing the top 50 of 69 patent records by PatentIndex Score.
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