Patents by Inventor Thomas P. Concannon

Thomas P. Concannon 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).

  • Method of making fluoropolymer laminates
    Patent number: 4988540
    Abstract: A process for preparing laminates of polyvinyl fluoride and at least one other fluoropolymer that are free from adhesive at the interface by dispersion coating a first film to form a second film and curing the second film at a temperature below the melting point of the first film.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: January 29, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Chester G. Bragaw, Jr., Thomas P. Concannon, Robert F. Davis
  • Fluoropolymer laminates
    Patent number: 4877683
    Abstract: Laminates of polyvinyl fluoride and at least one other fluoropolymer that are free from adhesive at the interface and a process for preparing the laminates by dispersion coating a first film to form a second film and curing the second film at a temperature below the melting point of the first film.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: October 31, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Chester G. Bragaw, Jr., Thomas P. Concannon, Robert F. Davis
  • Melt processable perfluorocarbon resin with degradation retarder
    Patent number: 4478965
    Abstract: Zeolites, including ultramarine blue retard the oxidative degradation of melt processible perfluorocarbon resins including FEP and PFA at elevated temperatures. Coating compositions of the perfluorocarbon resin, zeolite, and iron-containing pigments are provided.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: October 23, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas P. Concannon, Mitzie K. Rummel
  • Polytetrafluoroethylene resin with degradation retarder
    Patent number: 4425448
    Abstract: Zeolites, including ultramarine blue, retard the oxidative degradation of polytetrafluoroethylene resin (PTFE) at elevated temperatures. Coating compositions of PTFE, zeolites, acrylic resin and iron-containing pigments are provided.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: January 10, 1984
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Thomas P. Concannon, Mitzie K. Rummel
  • Article coated with aqueous dispersion of fluoropolymers in combination with epoxy-type film formers
    Patent number: 4393119
    Abstract: Aqueous dispersions of fluorocarbon polymers in combination with the water-borne reaction product of (a) carboxyl-functional polymers, (b) polyepoxides and (c) tertiary amines are provided. Such dispersions can be applied to a variety of substrates by either conventional coating techniques or electrodeposition, and provide coatings that exhibit excellent release properties and high lubricity.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: July 12, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Thomas P. Concannon
  • Article coated with fluoropolymer finish with improved durability
    Patent number: 4351882
    Abstract: Articles coated with multilayers of a composition of polytetrafluoroethylene plus a specified proportion of copolymers of perfluorinated polyvinyl ether and tetrafluoroethylene, to which is optionally added a heat stable polymer with a glass-transition temperature greater than or equal to 130.degree. C., are found to have improved durability. The proportion of the copolymer in each layer varies such that there is a maximum amount in the bottom layer with decreasing proportions in the other layer or layers.
    Type: Grant
    Filed: January 13, 1981
    Date of Patent: September 28, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas P. Concannon
  • Aqueous dispersion of fluoropolymers in combination with epoxy-type film formers
    Patent number: 4335030
    Abstract: Aqueous dispersions of fluorocarbon polymers in combination with the water-borne reaction product of (a) carboxyl-functional polymers, (b) polyepoxides and (c) tertiary amines are provided. Such dispersions can be applied to a variety of substrates by either conventional coating techniques or electrodeposition, and provide coatings that exhibit excellent release properties and high lubricity.
    Type: Grant
    Filed: June 30, 1981
    Date of Patent: June 15, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas P. Concannon
  • Fluoropolymer blend coating compositions containing copolymers of perfluorinated polyvinyl ether
    Patent number: 4252859
    Abstract: Blends of PTFE and perfluorinated ether copolymers of TFE and perfluoro(propyl vinyl ether) provide coating compositions which have reduced crystallinity and useful lives superior to what would be expected from averaging the properties of the unblended resins themselves.
    Type: Grant
    Filed: October 31, 1978
    Date of Patent: February 24, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas P. Concannon, Eva M. Vary
  • Method for providing heated fuser roll with improved release and wear life
    Patent number: 4075362
    Abstract: A coating composition, useful for preventing offset of toner to a heated fuser roll, comprises a dispersion of(A) a perfluoroolefin polymer of a fluorosurfactant; and(B) a carrier such as silicone oil:Said composition, when continuously applied to the uncoated metal fuser roll, increases the wear life of that roll to the wear life of the metallic surface of the roll and considerably extends the release life.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: February 21, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas P. Concannon
  • Fluoropolymer coating compositions having improved adhesion
    Patent number: 4070525
    Abstract: Compositions containing fluoropolymer, alkali metal silicate, the salt of a polyamide acid, a coalescing agent and a liquid carrier are useful for priming metal, especially cookware, before topcoating it with a fluoropolymer enamel.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: January 24, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Eustathios Vassiliou, Thomas P. Concannon
  • Fluoropolymer coating compositions having improved adhesion
    Patent number: 4016125
    Abstract: Compositions containing fluoropolymer, alkali metal silicate, the salt of a polyamide acid, a coalescing agent and a liquid carrier are useful for priming metal, especially cookware, before topcoating it with a fluoropolymer enamel.
    Type: Grant
    Filed: July 21, 1975
    Date of Patent: April 5, 1977
    Assignee: E. I. Du Pont de Nemours and Co.
    Inventors: Eustathios Vassiliou, Thomas P. Concannon
  • Fluoropolymer coating compositions having improved adhesion
    Patent number: 4011361
    Abstract: Compositions containing fluoropolymer, colloidal silica, the salt of a polyamide acid, a coalescing agent and a liquid carrier are useful for priming metal, especially cookware, before topcoating it with a fluoropolymer enamel.
    Type: Grant
    Filed: June 18, 1975
    Date of Patent: March 8, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Eustathios Vassiliou, Thomas P. Concannon