Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DS

David James Schreck

UTUnivation Technologies: 22 patents #27 of 289Top 10%
UTUnion Carbide Chemicals & Plastics Technology: 17 patents #24 of 701Top 4%
IBIowa Corn Promotion Board: 8 patents #1 of 29Top 4%
TTT.En Process Technology: 4 patents #2 of 30Top 7%
Dow Global Technologies: 3 patents #1,458 of 4,534Top 35%
UCUnion Carbide: 3 patents #288 of 1,402Top 25%
Lake City, MN: #1 of 31 inventorsTop 4%
Minnesota: #643 of 52,454 inventorsTop 2%
Overall (All Time): #40,261 of 4,157,543Top 1%
59 Patents All Time

Issued Patents All Time

Showing 26–50 of 59 patents

Patent #TitleCo-InventorsDate
6861483 Catalyst modifiers and their use in the polymerization of olefin(s) Timothy T. Wenzel, Dick Nagaki, Thomas H. Peterson 2005-03-01
6841631 Catalyst composition, method of polymerization, and polymer therefrom Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson +2 more 2005-01-11
6713573 Catalyst modifiers and their use in the polymerization of olefin(s) Timothy T. Wenzel, Dick Nagaki, Thomas H. Peterson 2004-03-30
6656866 Catalyst preparation method Timothy T. Wenzel 2003-12-02
6632769 Catalyst modifier and its use in the polymerization of olefin(s) Timothy T. Wenzel, Thomas H. Peterson 2003-10-14
6586544 Solution feed of multiple catalysts John F. Szul, Kersten Anne Erickson, Simon Mawson, Mark G. Goode, Paul T. Daniell +2 more 2003-07-01
6566462 Multiple catalyst system Rex E. Murray, Simon Mawson, John F. Szul, Kersten Anne Erickson, Tae Hoon Kwack +1 more 2003-05-20
6534604 Catalyst composition, method of polymerization, and polymer therefrom Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson +2 more 2003-03-18
6399722 Solution feed of multiple catalysts John F. Szul, Kersten Anne Erickson, Simon Mawson, Mark G. Goode, Paul T. Daniell +2 more 2002-06-04
6369174 Catalyst modifier and its use in the polymerization of olefin(s) Timothy T. Wenzel, Thomas H. Peterson 2002-04-09
6346584 Catalyst modifiers and their use in the polymerization of olefins(s) Timothy T. Wenzel, Dick Nagaki, Simon Mawson, Thomas H. Peterson 2002-02-12
6340730 Multiple catalyst system Rex E. Murray, Simon Mawson, John F. Szul, Kersten Anne Erickson, Tae Hoon Kwack +1 more 2002-01-22
6274684 Catalyst composition, method of polymerization, and polymer therefrom Donald R. Loveday, David H. McConville, John F. Szul, Kersten Anne Erickson, Simon Mawson +2 more 2001-08-14
6187970 Processes for producing 1,6-hexanediols John R. Briggs, Diane Lee Packett, David R. Bryant, Ailene Gardner Phillips, Anil Guram +3 more 2001-02-13
6166154 Olefin polymerization catalyst composition having increased activity John H. Oskam, Thomas H. Peterson, Purna Chand Sishta, Timothy T. Wenzel, Gregory T. Whiteker +1 more 2000-12-26
5912202 Olefin polymerization catalyst composition having increased activity John H. Oskam, Thomas H. Peterson, Purna Chand Sishta, Timothy T. Wenzel, Gregory T. Whiteker +1 more 1999-06-15
5821389 Processes for producing hydroxyaldehydes John R. Briggs, Diane Lee Packett, David R. Bryant, Ailene Gardner Phillips, Kurt D. Olson +4 more 1998-10-13
5281751 Synergistic production of carboxylic acids from alcohols 1994-01-25
5231230 Selective production of diethylenetriamine Lloyd M. Burgess, Arthur R. Doumaux, Jr., Stephen W. King 1993-07-27
5225600 Amines catalysis using group VIB metal-containing condensation catalysts Stephen W. King, Arthur R. Doumaux, Jr. 1993-07-06
5220071 Selective production of pentaethylenehexamine and hydroxyethyltriethylenetetramine Lloyd M. Burgess, Arthur R. Doumaux, Jr., Stephen W. King 1993-06-15
5210306 Promoted amines catalysis Arthur R. Doumaux, Jr., Stephen W. King, George A. Skoler 1993-05-11
5202489 Amines catalysis Arthur R. Doumaux, Jr., George A. Skoler, Stephen W. King 1993-04-13
5202492 Amines catalysis using metallic phosphate condensation catalysts having a cyclic structure Arthur R. Doumaux, Jr. 1993-04-13
5202491 Process for the manufacture of diethylenetriamine Lloyd M. Burgess, Charles A. Gibson 1993-04-13