Patents by Inventor Maurice S. Brookhart, III
Maurice S. Brookhart, III has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7297806Abstract: Alpha-olefin are manufactured in high yield and with very high selectivity by contacting ethylene with an iron complex of a selected 2,6-pyridinedicarboxaldehyde bisimine or a selected 2,6-diacylpyridine bisimine, and in some cases a selected activator compound such as an alkyl aluminum compound. Novel bisimines and their iron complexes are also disclosed. The ?-olefin are useful as monomers and chemical intermediates.Type: GrantFiled: September 5, 2002Date of Patent: November 20, 2007Assignees: EI du Pont de Nemours and Company, University of North CarolinaInventors: Maurice S. Brookhart, III, Brooke L. Small
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Patent number: 6740715Abstract: Alpha-olefins are manufactured in high yield and with very high selectivity by contacting ethylene with an iron complex of a selected 2,6-pyridinedicarboxaldehyde bisimine or a selected 2,6-diacylpyridine bisimine, and in some cases a selected activator compound such as an alkyl aluminum compound. Novel bisimines and their iron complexes are also disclosed. The &agr;-olefins are useful as monomers and chemical intermediates.Type: GrantFiled: September 5, 2002Date of Patent: May 25, 2004Assignees: E. I. du Pont de Nemours and Company, University of North CarolinaInventors: Maurice S. Brookhart, III, Brooke L. Small
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Patent number: 6495646Abstract: Polyolefins with unique highly branched structures, and which have unusually low Mark-Houwink constants are described. They are useful for instance as elastomers, viscosity index modifiers and lubricating oil bases.Type: GrantFiled: February 29, 2000Date of Patent: December 17, 2002Assignees: E. I. du Pont de Nemours and Company, University of North Carolina at Chapel HillInventors: Samuel David Arthur, Maurice S. Brookhart, III, Patricia Metzger Cotts, Zhibin Guan, Lynda Kaye Johnson, Christopher Moore Killian, Elizabeth Forrester McCord, Stephan James McLain
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Patent number: 6489497Abstract: Alpha-olefins are manufactured in high yield and with very high selectivity by contacting ethylene with an iron complex of a selected 2,6-pyridinedicarboxaldehyde bisimine or a selected 2,6-diacylpyridine bisimine, and in some cases a selected activator compound such as an alkyl aluminum compound. Novel bisimines and their iron complexes are also disclosed. The &agr;-olefins are useful as monomers and chemical intermediates.Type: GrantFiled: July 7, 2000Date of Patent: December 3, 2002Assignees: E. I. du Pont de Nemours and Company, University of North CarolinaInventors: Maurice S. Brookhart, III, Brooke L. Small
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Patent number: 6232483Abstract: Certain nickel [II] complexes of selected ortho-phosphine substituted arylsulfonamides or selected phosphine containing alkylsulfonamides catalyze the polymerization of ethylene. The polymers produced may be used as lubricants or in waxes. Some of these nickel [II] complexes and the phosphine containing ligands are also novel compounds.Type: GrantFiled: November 18, 1999Date of Patent: May 15, 2001Assignee: E. I. du Pont Nemours and CompanyInventors: Jordan Lawrence Bennett, Maurice S. Brookhart, III, Lynda Kaye Johnson, Christopher Moore Killian
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Patent number: 6103946Abstract: Alpha-olefins are manufactured in high yield and with very high selectivity by contacting ethylene with an iron complex of a selected 2,6-pyridinedicarboxaldehyde bisimine or a selected 2,6-diacylpyridine bisimine, and in some cases a selected activator compound such as an alkyl aluminum compound. Novel bisimines and their iron complexes are also disclosed. The .alpha.-olefins are useful as monomers and chemical intermediates.Type: GrantFiled: January 12, 1998Date of Patent: August 15, 2000Assignees: E. I. du Pont de Nemours and Company, University of North CarolinaInventors: Maurice S. Brookhart, III, Brooke L. Small
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Patent number: 6060569Abstract: Certain nickel [II] complexes of selected orthophosphine substituted arylsulfonamides or selected phosphine containing alkylsulfonamides catalyze the polymerization of ethylene. The polymers produced may be used as lubricants or in waxes. Some of these nickel [II] complexes and the phosphine containing ligands are also novel compounds.Type: GrantFiled: January 13, 1998Date of Patent: May 9, 2000Assignees: E. I. du Pont de Nemours and Company, University of North California at Chapel HillInventors: Jordan Lawrence Bennett, Maurice S. Brookhart, III, Lynda Kaye Johnson, Christopher Moore Killian
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Patent number: 5916989Abstract: 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. Since some of the polymerizations exhibit some characteristics of living polymerizations, block copolymers can be readily made. Many of the polymers produced are often novel, particularly in regard to their microstructure, which gives some of them unusual properties. Numerous novel catalysts are disclosed, as well as some novel processes for making them. The polymers made are useful as elastomers, molding resins, in adhesives, etc. Also described herein is the synthesis of linear .alpha.-olefins by the oligomerization of ethylene using as a catalyst system a combination a nickel compound having a selected .alpha.-diimine ligand and a selected Lewis or Bronsted acid, or by contacting selected .alpha.Type: GrantFiled: July 10, 1997Date of Patent: June 29, 1999Assignees: E. I. du Pont de Nemours and Company, University of North Carolina at Chapel HillInventors: Maurice S. Brookhart, III, Lynda Kaye Johnson, Christopher Moore Killian, Elizabeth Forrester McCord, Stephan James McLain
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Patent number: 5880323Abstract: 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. Since some of the polymerizations exhibit some characteristics of living polymerizations, block copolymers can be readily made. Many of the polymers produced are often novel, particularly in regard to their microstructure, which gives some of them unusual properties. Numerous novel catalysts are disclosed, as well as some novel processes for making them. The polymers made are useful as elastomers, molding resins, in adhesives, etc. Also described herein is the synthesis of linear .alpha.-olefins by the oligomerization of ethylene using as a catalyst system a combination a nickel compound having a selected .alpha.-diimine ligand and a selected Lewis or Bronsted acid, or by contacting selected .alpha.Type: GrantFiled: July 10, 1997Date of Patent: March 9, 1999Assignees: E. I. du Pont de Nemours and Company, University of North CarolinaInventors: Maurice S. Brookhart, III, Lynda Kaye Johnson, Christopher Moore Killian, Lin Wang, Zhen-Yu Yang