1
Harold E Bellis, Edward F McBride: Composition and method for temporarily reducing permeability of subterranean formations. E I Du Pont de Nemours and Company, Craig H Evans, December 29, 1987: US04715967 (163 worldwide citation)

This invention relates to a composition and method of temporarily reducing the permeability of subterranean formations penetrated by a wellbore. In particular, it relates to an inexpensive, low molecular weight condensation product of hydroxy acetic acid with itself or compounds containing other hyd ...


2
Maurice S Brookhart, Lynda Kaye Johnson, Christopher Moore Killian, Samuel David Arthur, Jerald Feldman, Elizabeth Forrester McCord, Stephan James McLain, Kristina Ann Kreutzer, Alison Margaret Anne Bennett, Edward Bryan Coughlin, Steven Dale Ittel, Anju Parthasarathy, Lin Wang, Zhen Yu Yang: Processes of polymerizing olefins. E I du Pont de Nemours and Company, University of North Carolina, Craig H Evans, Joel D Citron, February 2, 1999: US05866663 (115 worldwide citation)

Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and sometimes other co-catalysts. Sinc ...


3
John C Chen: Bi-modal ionomers. E I du Pont de Nemours and Company, Craig H Evans, May 13, 2003: US06562906 (106 worldwide citation)

The present invention relates to compositions and preparative process of partially or fully neutralized mixtures of carboxylate functionalized ethylene high copolymers or terpolymers (Mw between 80,000 and 500,000) with carboxylate functionalized ethylene low copolymers (Mw between 2,000 and 30,000) ...


4
Stuart M Nemser, Ian C Roman: Perfluorodioxole membranes. Du Pont Canada, Craig H Evans, September 24, 1991: US05051114 (100 worldwide citation)

A selectively permeable membrane for the separation or enrichment of gaseous mixtures may be formed from amorphous polymers of perfluoro-2,2-dimethyl-1,3-dioxole, especially copolymers with a complementary amount of at least one of tetrafluoroethylene, perfluoromethyl vinyl ether, vinylidene fluorid ...


5
Kamlesh K Bhatia: Atmospheric pressure process for preparing pure cyclic esters. E I Du Pont De Nemours and Company, Craig H Evans, May 30, 1989: US04835293 (95 worldwide citation)

This invention relates to an improved process for preparing highly pure cyclic esters by heating a polymer of the corresponding .alpha.-hydroxy acid or its ester or a copolymer of .alpha.-hydroxy acid or its ester and a thermally stable polyether in the presence of an inert gas at atmospheric pressu ...


6
Alison Margaret Anne Bennett: Polymerization of ethylene. E I du Pont de Nemours and Company, Joel D Citron, Craig H Evans, September 21, 1999: US05955555 (94 worldwide citation)

Ethylene may be polymerized by contacting it with certain iron or cobalt complexes of selected 2,6-pyridinecarboxaldehydebis(imines) and 2,6-diacylpyridinebis(imines). The polymers produced are useful as molding resins. Novel 2,6-pyridinecarboxaldehydebis(imines) and 2,6-diacylpyridinebis(imines), a ...


7
Robert J Statz, John F Hagman: High-resilience ionomeric compositions for golf ball covers. E I Du Pont de Nemours and Company, Peter A Fowell, Craig H Evans, March 29, 1994: US05298571 (76 worldwide citation)

Ionomers derived from ethylene/methacrylic acid or ethylene/acrylic acid copolymers, containing high levels of acid neutralized with lithium, zinc and sodium are blended in defined amounts to form compositions with very high resilience. The compositions are highly suitable for use as golf ball cover ...


8
Harold E Bellis: Process for preparing highly pure cyclic esters. E I Du Pont de Nemours and Company, Craig H Evans, February 23, 1988: US04727163 (66 worldwide citation)

A process for making highly pure cyclic esters by heating a copolymer of .alpha.-hydroxy acid or its ester on a thermally stable polyether core.


9
Lynda Kaye Johnson, Jerald Feldman, Kristina Ann Kreutzer, Stephan James McLain, Alison Margaret Anne Bennett, Edward Bryan Coughlin, Dennis Scott Donald, Lissa Taka Jennings Nelson, Anju Parthasarathy, Xing Shen, Wilson Tam, Yueli Wang: Olefin polymerization process. E I DuPont de Nemours and Company, Craig H Evans, Joel D Citron, February 3, 1998: US05714556 (61 worldwide citation)

Disclosed herein is a process for the polymerization of ethylene, norbornenes and styrenes, by contacting in solution a selected nickel compound and a selected compound which is or can coordinated to the nickel with the olefin(s). The polymers produced are useful for films and molding resins.


10
Lynn E Applegate, Carl W Erkenbrecher Jr, Harvey Winters: Prevention of biofouling of reverse osmosis membranes. E I Du Pont de Nemours and Company, Craig H Evans, January 29, 1991: US04988444 (60 worldwide citation)

An improved process is disclosed for killing and inhibiting growth and reproduction (aftergrowth) of microorganisms comprising adding sufficient chloramine to kill the microorganisms without oxidizing high molecular weight organics, which are not easily assimilated by organisms that survive, into lo ...