Patents by Inventor Robert J. Kolouch

Robert J. Kolouch 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).

  • Conductive filled fluoropolymers
    Patent number: 5000875
    Abstract: Tetrafluoroethylene copolymer compositions containing conductive carbon black, graphite fiber or thermally conductive fillers have significantly increased conductivity when the tetrafluoroethylene copolymer has been treated with a fluorinating agent.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: March 19, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert J. Kolouch
  • Conductive fluoropolymers
    Patent number: 4902444
    Abstract: Electrically conductive tetrafluoroethylene copolymer compositions containing conductive carbon black have significant increased conductivity and lower effective melt viscosity when the tetrafluoroethylene copolymer has been treated with a fluorinating agent.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: February 20, 1990
    Assignee: E. I. DuPont De Nemours and Company
    Inventor: Robert J. Kolouch
  • Process for extruding a modified high molecular weight poly(ethylene terephthalate) resin
    Patent number: 4409167
    Abstract: Poly(ethylene terephthalate) resin and blends of poly(ethylene terephthalate) resin with other polymers are extruded while being coupled with an organic diisocyanate under conditions where carbon dioxide gas is vented smoothly, as it is formed. The extruder has a number of zones designed to perform specific functions. The temperature in the kneading zone and in the venting zone must be maintained at about 280.degree.-320.degree. C. to bring about rapid reaction and to permit efficient gas evolution and removal without thermally degrading the polymeric material. The extruded article is free of trapped gas bubbles and other imperfections. This process is particularly suitable for making PET billets, which then are stretched to form strapping useful in packaging applications.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: October 11, 1983
    Assignee: E. I. Du Pont de Nemours & Co,
    Inventors: Robert J. Kolouch, Rudolph H. Michel