Patents by Inventor Eric W. Burkhardt

Eric W. Burkhardt 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).

  • Process for purification of phosphate esters
    Patent number: 7759522
    Abstract: A crude phosphate ester product can be purified by first washing it with chelating agent composition (such as a dilute acidic solution) and then, preferably, water, drying the resulting product, and then treating the resulting product with an acid scavenger, as exemplified by an epoxy-containing compound, such as 3,4-epoxy cyclohexyl methyl-3,4-epoxy cyclohexyl carboxylate.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: July 20, 2010
    Assignee: Supresta LLC
    Inventors: Danielle A. Bright, Eric W. Burkhardt, Antoon ten Kate, Sophia Dashevsky, John Tomko
  • Process for purification of phosphate esters
    Publication number: 20040116728
    Abstract: A crude phosphate ester product can be purified by first washing it with chelating agent composition (such as a dilute acidic solution) and then, preferably, water, drying the resulting product, and then treating the resulting product with an acid scavenger, as exemplified by an epoxy-containing compound, such as 3,4-epoxy cyclohexyl methyl-3,4-epoxy cyclohexyl carboxylate.
    Type: Application
    Filed: January 16, 2004
    Publication date: June 17, 2004
    Inventors: Danielle A. Bright, Eric W. Burkhardt, Antoon ten Kate, Sophia Dashevsky, John Tomko
  • Epoxy-stabilized polyphosphate compositions
    Patent number: 6717005
    Abstract: A polyphosphate ester composition consisting essentially of an effective amount of a cycloaliphatic epoxy composition for reduction of the total acid number of the composition. The phosphate ester is of the formula: where R can be aryl or alkaryl, R′ can be arylene, arylene-alkylene-arylene, or alkylene, and n ranges from about 1 to about 5.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: April 6, 2004
    Assignee: Akzo Nobel N.V.
    Inventors: Eric W. Burkhardt, Danielle A. Bright, Sergei Levchik, Sophia Dashevsky, Mark Buczek
  • Epoxy-stabilized polyphosphate compositions
    Publication number: 20030212287
    Abstract: A polyphosphate ester composition consisting essentially of an effective amount of a cycloaliphatic epoxy composition for reduction of the total acid number of the composition.
    Type: Application
    Filed: May 13, 2002
    Publication date: November 13, 2003
    Inventors: Eric W. Burkhardt, Danielle A. Bright, Sergei Levchik, Sophia Dashevsky, Mark Buczek
  • Epoxy functional copolymer of higher A-olefin and unsaturated dicarboxylic acid ester and derivatives thereof
    Patent number: 5334682
    Abstract: Epoxy functional copolymers of a higher .alpha.-olefin, and an unsaturated dicarboxylic acid ester formed by copolymerization of olefin, acid ester and ethylenically unsaturated glycidyl compound can be used to form nitrogen, oxygen, phosphorus and/or sulfur-containing lubricant additives by reaction of the epoxy functionality in such a copolymer with glycidyl-reactive compounds containing nitrogen, oxygen, phosphorus and/or sulfur atoms. Alternatively, the copolymerization reaction can utilize the olefin, unsaturated acid ester, and an ethylenically unsaturated compound containing the nitrogen, phosphorus and/or sulfur atom, which compound is formed by reaction of ethylenically unsaturated glycidyl compound and an epoxy-reactive nitrogen, phosphorus, and/or sulfur-containing compound.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: August 2, 1994
    Assignee: Akzo nv
    Inventors: Theodore A. Marolewski, Eric W. Burkhardt, Uwe H. Wallfahrer
  • Epoxy functional copolymer of higher .alpha.-olefin and unsaturated dicarboxylic acid ester and derivatives thereof
    Patent number: 5274102
    Abstract: Epoxy functional copolymers of a higher .alpha.-olefin, and an unsaturated dicarboxylic acid ester formed by copolymerization of olefin, acid ester and ethylenically unsaturated glycidyl compound can be used to form nitrogen, oxygen, phosphorus and/or sulfur-containing lubricant additives by reaction of the epoxy functionality in such a copolymer with glycidyl-reactive compounds containing nitrogen, oxygen, phosphorus and/or sulfur atoms. Alternatively, the copolymerization reaction can utilize the olefin, unsaturated acid ester, and an ethylenically unsaturated compound containing the nitrogen, phosphorus and/or sulfur atom, which compound is formed by reaction of ethylenically unsaturated glycidyl compound and an epoxy-reactive nitrogen, phosphorus, and/or sulfur-containing compound.
    Type: Grant
    Filed: February 19, 1993
    Date of Patent: December 28, 1993
    Assignee: Akzo nv
    Inventors: Theodore A. Marolewski, Eric W. Burkhardt, Uwe H. Wallfahrer
  • Blend of silicate and photocurable arylsiloxane materials
    Patent number: 5118742
    Abstract: Good quality films can be formed on a substrate by coating a substrate with a solution comprising a liquid silicate solvent containing a dissolved photocurable arylsiloxane oligomer or polymer. Phenyl silocane/silicate compositions can be used to form photocurable films on substrates for use as dielectric films, protective coatings, and the like.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: June 2, 1992
    Assignee: Akzo NV
    Inventors: Eric W. Burkhardt, John H. Deatcher, Robert Burford
  • Hardness improvement of film containing arylsiloxane and organosilicate
    Patent number: 5106658
    Abstract: The hardness of coatings comprising a photocurable arylsiloxane oligomer or polymer and a liquid organosilicate can be dramatically improved by first curing the coating with ultraviolet light followed by heating.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: April 21, 1992
    Assignee: Akzo NV
    Inventors: Eric W. Burkhardt, Klara Kiss, John H. Deatcher
  • Blend of solvent and photocurable arylsiloxane materials
    Patent number: 5089303
    Abstract: Good quality films can be formed on a substrate by coating a substrate with a solution comprising an alkoxy alkanol solvent containing a dissolved photocurable arylsiloxane oligomer or polymer. Phenyl siloxane/silicate compositions can be used to form photocurable films on substrates for use as dielectric films, protective coatings, and the like.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: February 18, 1992
    Assignee: Akzo America Inc.
    Inventors: John H. Deatcher, Eric W. Burkhardt
  • Organic solvent soluble polyvalent metal alkoxy alkoxides
    Patent number: 4837190
    Abstract: Organic solvent soluble alkoxides of magnesium, calcium, strontium, barium, scandium, yttrium and lanthanum are prepared by the reaction of these elements with alkoxy alcohols.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: June 6, 1989
    Assignee: Akzo America Inc.
    Inventors: William Summers, III, Eric W. Burkhardt
  • Method of making organic solvent soluble zinc alkoxy alkoxides
    Patent number: 4751318
    Abstract: Organic solvent soluble zinc alkoxides are prepared by the reaction of dialkyl zinc with an alkoxy alcohol.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: June 14, 1988
    Assignee: Stauffer Chemical Company
    Inventors: William Summers, III, Eric W. Burkhardt