Patents by Inventor Dennis P. Bauer

Dennis P. Bauer 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).

  • Amine oxide process
    Patent number: 4994614
    Abstract: Tert-amine oxides that are substantially free of nitrosamines are made by reacting a tert-amine, e.g., dodecyl dimethylamine, with aqueous hydrogen peroxide in the presence of the synergistic combination of (a) ascorbic acid and (b) a promoter formed from carbon dioxide.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: February 19, 1991
    Assignee: Ethyl Corporation
    Inventors: Dennis P. Bauer, Teresa K. Summerford
  • Amine oxide process
    Patent number: 4889954
    Abstract: Tertiary amines are converted to amine oxides in high conversion and at a faster rate by including dialkylcarbonate in the reaction of the tert-amine with aqueous hydrogen peroxide. Ascorbic acid can be used as a co-catalyst.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: December 26, 1989
    Assignee: Ethyl Corporation
    Inventors: Kathleen S. Laurenzo, Dennis P. Bauer
  • Process for preparing tertiary phosphines
    Patent number: 4514575
    Abstract: Tertiary phosphine oxides, such as triphenylphosphine oxide, are reduced to the corresponding phosphines with trichlorosilane in an inert halogenated hydrocarbon solvent.
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: April 30, 1985
    Assignee: Ethyl Corporation
    Inventors: John Y. Lee, Dennis P. Bauer
  • Process for preparing amino acid esters
    Patent number: 4496756
    Abstract: A enolizable organic compound, such as benzyl chloride, is reacted with an acid amide, an alcohol, carbon monoxide, and hydrogen in a homogeneous reaction mixture containing a cobalt carbonylation catalyst, an alkali metal alcoholate, and methyl isobutyl ketone so as to form an N-acylamino acid ester such as N-acetyl-D,L-phenylalanine methyl ester.
    Type: Grant
    Filed: September 1, 1983
    Date of Patent: January 29, 1985
    Assignee: Ethyl Corporation
    Inventor: Dennis P. Bauer
  • Process for producing N-acyl-D-phenylalanine ester
    Patent number: 4262092
    Abstract: Production of optically pure N-acyl-D-phenylalanine ester by reacting a racemic mixture of N-acyl-D,L-phenylalanine ester with a proteolytic enzyme and separating the resulting N-acyl-D-phenylalanine ester from the solution with subsequent removal of the N-acyl and ester groups to provide D-phenylalanine.
    Type: Grant
    Filed: May 8, 1979
    Date of Patent: April 14, 1981
    Assignee: Ethyl Corporation
    Inventor: Dennis P. Bauer
  • Process for resolving D, L-leucine
    Patent number: 4259441
    Abstract: Production of optically pure D-leucine and L-leucine ester by treating a racemic mixture of N-acyl-D,L-leucine ester with a proteolytic enzyme and separating the resulting N-acyl-L-leucine and N-acyl-D-leucine ester from the solution with subsequent removal of the N-acyl and ester groups to provide L-leucine and D-leucine, respectively.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: March 31, 1981
    Assignee: Ethyl Corporation
    Inventor: Dennis P. Bauer
  • Preparation of 3-thenyl bromide
    Patent number: 4235685
    Abstract: A process for selective bromination of alkyl heterocyclic compounds, such as alkyl thiophenes, by reacting with a brominating agent in a solvent using infrared light as an initiator.
    Type: Grant
    Filed: September 4, 1979
    Date of Patent: November 25, 1980
    Assignee: Ethyl Corporation
    Inventor: Dennis P. Bauer