Patents by Inventor Donald J. Burton

Donald J. Burton 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).

  • Patent number: 6653515
    Abstract: &agr;,&bgr;,&bgr;-Trifluorostyrene and derivatives thereof synthesized in two steps from 1,1,1,2-tetrafluoroethylene. In the first step, 1,1,1,2-tetrafluoroethylene is reacted with a base, a metal salt such as zinc chloride and an optionally amine to form a trifluorovinyl metal complex. In the second step, the trifluorostyrene or derivative is obtained by reacting the trifluorovinyl metal complex with an aryl transfer agent such as, for example, an aryl triflate or an aryl halide, in the presence of a metal catalyst and optionally a coordinating ligand. Both steps may be carried out in one reactor.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: November 25, 2003
    Assignee: Ballard Power Systems Inc.
    Inventors: Charles Stone, Timothy J. Peckham, Donald J. Burton, Anilkumar Raghavanpillai
  • Publication number: 20030144439
    Abstract: &agr;,&bgr;,&bgr;-Trifluorostyrene and derivatives thereof synthesized in two steps from 1,1,1,2-tetrafluoroethylene. In the first step, 1,1,1,2-tetrafluoroethylene is reacted with a base, a metal salt such as zinc chloride and an optionally amine to form a trifluorovinyl metal complex. In the second step, the trifluorostyrene or derivative is obtained by reacting the trifluorovinyl metal complex with an aryl transfer agent such as, for example, an aryl triflate or an aryl halide, in the presence of a metal catalyst and optionally a coordinating ligand. Both steps may be carried out in one reactor.
    Type: Application
    Filed: December 14, 2001
    Publication date: July 31, 2003
    Applicant: Ballard Power Systems Inc.
    Inventors: Charles Stone, Timothy J. Peckham, Donald J. Burton, Anilkumar Raghavanpillai
  • Patent number: 4895991
    Abstract: The process of direct synthesis of trifluoromethyl copper and trifluoromethyl aromatics, both intermediate reagents useful in direct synthesis of certain perfluoroalkyl compounds. The process involves a direct reaction between on the one hand an aromatic halide and a difluorodihalomethane and on the other hand copper and a difluorodihalomethane.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: January 23, 1990
    Assignee: University of Iowa Research Foundation
    Inventors: Donald J. Burton, Denise M. Wiemers, Jerome C. Easdon
  • Patent number: 4749802
    Abstract: The process of direct synthesis of trifluoromethyl copper and trifluoromethyl aromatics, both intermediate reagents useful in direct synthesis of certain perfluoroalkyl compounds. The process involves a direct reaction between on the one hand an aromatic halide and a difluorodihalomethane and on the other hand copper and a difluorodihalomethane.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: June 7, 1988
    Assignee: University of Iowa Research Foundation, Inc.
    Inventors: Donald J. Burton, Denise M. Wiemers, Jerome C. Easdon
  • Patent number: 4650887
    Abstract: The basic single step process for preparing trifluoromethyl organocadmium and zinc compounds from difluorodihalomethane is disclosed. The prepared trifluoromethyl compound may be used to add the trifluoromethyl to a variety of organic structures in a trifluoromethylating reaction. Among the structures included are aromatic compounds, halo olefins, allylic compounds, acetylenic compounds and acyl halides.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: March 17, 1987
    Assignee: University of Iowa Research Foundation
    Inventors: Donald J. Burton, Denise M. Wiemers, Jerome C. Easdon
  • Patent number: 4582921
    Abstract: The basic single step process for preparing trifluoromethyl organocadmium and zinc compounds from difluorodihalomethane is disclosed. The prepared trifluoromethyl compound may be used to add the trifluoromethyl to a variety of organic structures in a trifluoromethylating reaction. Amongst the structures included are aromatic compounds, halo olefins, allylic compounds, acetylenic compounds and acyl halides.
    Type: Grant
    Filed: September 17, 1984
    Date of Patent: April 15, 1986
    Assignee: University of Iowa Research Foundation
    Inventors: Donald J. Burton, Denise M. Wiemers, Jerome C. Easdon
  • Patent number: 4478761
    Abstract: Fluorine-containing phosphonates and phosphonic acids are described. The method of preparation is a reaction of trialkylphosphites with dihalodifluoromethanes or a reaction of the salts of dialkylphosphites with halodifluoromethylphosphonates. The corresponding phosphonic acids are prepared by hydrolysis of the phosphonates.
    Type: Grant
    Filed: April 22, 1983
    Date of Patent: October 23, 1984
    Assignee: University of Iowa Research Foundation
    Inventors: Donald J. Burton, Richard M. Flynn
  • Patent number: 4393011
    Abstract: Fluorine-containing phosphonates and phosphonic acids are described. The method of preparation is a reaction of trialkylphosphites with dihalodifluoromethanes or a reaction of the salts of dialkylphosphites with halodifluoromethylphosphonates. The corresponding phosphonic acids are prepared by hydrolysis of the phosphonates.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: July 12, 1983
    Assignee: University of Iowa Research Foundation
    Inventors: Donald J. Burton, Richard M. Flynn
  • Patent number: 4330486
    Abstract: Fluorine-containing phosphonates and phosphonic acids are described. The method of preparation is a reaction of trialkylphosphites with dihalodifluoromethanes or a reaction of the salts of dialkylphosphites with halodifluoromethylphosphonates. The corresponding phosphonic acids are prepared by hydrolysis of the phosphonates.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: May 18, 1982
    Assignee: University of Iowa Reseach Foundation
    Inventors: Donald J. Burton, Richard M. Flynn