Patents by Inventor Leslie Mitchell Blair

Leslie Mitchell Blair 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).

  • Fluoropolymer stabilization
    Patent number: 6689833
    Abstract: Fluoropolymer resin is stabilized and/or whitened by addition of a small amount of alkali metal nitrate prior to extrusion. The nitrate can be introduced during polymerization, isolation, or preparation of extruder feed.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: February 10, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David Elton Bidstrup, Leslie Mitchell Blair
  • Fluoropolymer extrusion process
    Patent number: 5703185
    Abstract: Copolymers of tetrafluoroethylene, hexafluoropropylene, and perfluoro(ethyl vinyl ether) can be extruded at higher rates than corresponding copolymers containing perfluoro(propyl vinyl ether).
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: December 30, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Leslie Mitchell Blair
  • Process for polymerization of copolymers of tetrafluoroethylene and hexafluoropropylene
    Patent number: 5700889
    Abstract: An aqueous polymerization process yields copolymers of tetrafluoroethylene and hexafluoropropylene that have low instability as polymerized and can by used without elaborate finishing steps.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: December 23, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Leslie Mitchell Blair
  • Tetrafluoroethylene terpolymer
    Patent number: 5688885
    Abstract: Copolymers of tetrafluoroethylene, hexafluoropropylene, and perfluoro(methyl vinyl ether) have excellent flex life.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: November 18, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Leslie Mitchell Blair
  • Tetrafluoroethylene terpolymer
    Patent number: 5677404
    Abstract: Copolymers of tetrafluoroethylene, hexafluoropropylene, and perfluoro(ethyl vinyl ether) can be extruded at much higher rates than corresponding copolymers containing perfluoro(propyl vinyl ether).
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: October 14, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Leslie Mitchell Blair