Patents by Inventor Stuart K. Randa

Stuart K. Randa 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).

  • Polymer processing aid and method for processing polymers
    Patent number: 7662324
    Abstract: In an exemplary embodiment, the present method includes the stops of providing a polymer resin to be processed: blending particulate boron nitride (BN) and a fluorine-containing polymer with said polymer resin to provide a resin blend: heating said resin blend to obtain a desired flowability value: and processing said resin blend into a desired shape.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: February 16, 2010
    Assignee: Saint-Gobain Ceramics & Plastics, Inc
    Inventors: Eugene A. Pruss, Thomas M. Clere, Stuart K. Randa
  • Polymer processing aid and method for processing polymers
    Publication number: 20040220288
    Abstract: In an exemplary embodiment, the present method includes the stops of providing a polymer resin to be processed: blending particulate boron nitride (BN) and a fluorine-containing polymer with said polymer resin to provide a resin blend: heating said resin blend to obtain a desired flowability valve: and processing said resin blend into a desired shape.
    Type: Application
    Filed: June 18, 2004
    Publication date: November 4, 2004
    Inventors: Eugene A. Pruss, Thomas M. Clere, Stuart K. Randa
  • Extrusion aid combination
    Publication number: 20030144370
    Abstract: The combination of fluoropolymer processing aid with foam cell nucleating agent gives a combined processing aid that is far superior to either individually when used in the extrusion of melt processible polymers.
    Type: Application
    Filed: January 22, 2003
    Publication date: July 31, 2003
    Inventors: Charles W. Stewart, Stuart K. Randa, Savvas G. Hatzikiriakos, Evgueni E. Rozenbaoum, Marlin D. Buckmaster
  • Extrusion aid combination
    Publication number: 20010048179
    Abstract: The combination of fluoropolymer processing aid with foam cell nucleating agent gives a combined processing aid that is far superior to either individually when used in the extrusion of melt processible polymers.
    Type: Application
    Filed: December 19, 2000
    Publication date: December 6, 2001
    Inventors: Charles W. Stewart, Stuart K. Randa, Savvas G. Hatzikiriakos, Evgueni E. Rozenbaoum, Marlin D. Buckmaster
  • Foamable fluoropolymer composition
    Patent number: 5610203
    Abstract: An improved foam nucleation system based on selected boron nitride provides smaller foam cell size for melt-fabricable fluoropolymers.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: March 11, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Marlin D. Buckmaster, Stuart K. Randa
  • Composite wire construction
    Patent number: 5171635
    Abstract: A wire construction comprising an electrically conductive core, two polymeric insulation layers and a layer of fiber braid between the insulation layers, characterized by excellent flexibility and resistance to cut-through and arc propagation.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: December 15, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stuart K. Randa
  • Nucleating agents for thermoplastic resins
    Patent number: 5032621
    Abstract: This invention relates to the use of a special class of sulfonic and phosphonic acids, and salts of the acids, to give improved nucleation for foam extrusion of thermoplastics using either dissolved gas or chemical blowing agents to produce foam.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: July 16, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Marlin D. Buckmaster, Stuart K. Randa
  • Nucleating agents for thermoplastic resins
    Patent number: 5023279
    Abstract: This invention relates to the use of a special class of sulfonic and phosphonic acids, and salts of the acids, to give improved nucleation for foam extrusion of thermoplastics using either dissolved gas or chemical blowing agents to produce foam.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: June 11, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Marlin D. Buckmaster, Stuart K. Randa
  • Nucleating agents for thermoplastic resins
    Patent number: 4877815
    Abstract: This invention relates to the use of a special class of sulfonic and phosphonic acids, and salts of the acids, to give improved nucleation for foam extrusion of thermoplastics using either dissolved gas or chemical blowing agents to produce foam.
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: October 31, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Marlin D. Buckmaster, Stuart K. Randa
  • Foam nucleation system for fluoropolymers
    Patent number: 4764538
    Abstract: This invention relates to foamable melt processible fluoropolymer resins containing boron nitride and one or more of a class of inorganic salts which significantly enhance foam nucleation (as evidenced by small foam cell size).
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: August 16, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Marlin D. Buckmaster, Stuart K. Randa
  • Thin wall high performance insulation on wire
    Patent number: 4716073
    Abstract: This invention relates to the use of ethylene/tetrafluoroethylene (ETFE) or ethylene/chlorotrifluoroethylene (ECTFE) polymers to produce a foamed coating of insulation over wire and used as wire pairs for transmitting electronic signals, in which the foamed coating is surrounded by a protective jacket or skin made of one of the two polymers.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: December 29, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stuart K. Randa
  • Thin wall cover on foamed insulation on wire
    Patent number: 4711811
    Abstract: This invention relates to the use of ethylene/tetrafluoroethylene (ETFE) or ethylene/chlorotrifluoroethylene (ECTFE) polymers to produce a foamed coating of insulation over wire and used as wire pairs for transmitting electronic signals, in which the foamed coating is surrounded by a protective jacket or skin made of one of the two polymers.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: December 8, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stuart K. Randa