Patents by Inventor Stephen O. Cook

Stephen O. Cook 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 and apparatus for forming multilaminate film
    Patent number: 5262109
    Abstract: A system and process for producing a tubular multilaminate film having a plurality of bonded resin sheets. At least one of the sheets is formed from an annular resin stream of spirally extruded resin and at least one of the sheets is formed from an annular resin stream of non-spirally extruded resin.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: November 16, 1993
    Assignee: James River II, Inc.
    Inventor: Stephen O. Cook
  • Styrene-butadiene compositions having improved barrier properties
    Patent number: 5106677
    Abstract: The barrier properties, particularly water vapor transmission rate, of compositions comprising a stryene-butadiene polymer can be improved substantially by adding from about 0.5 to 10 percent of a polyethylene type wax to the composition.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: April 21, 1992
    Assignee: James River II Inc.
    Inventors: Gene H. Yeh, Stephen O. Cook
  • Flexible packaging films of high density polyethylene capable of forming easily openable heatseals
    Patent number: 4188441
    Abstract: Flexible packaging films of high density polyethylene capable of forming easily openable heatseals can be made by coextruding a layer of the high density polyethylene adjacent to a layer of a blend of an ionomer and a copolymer of ethylene and vinyl acetate or an ester of acrylic and or methacrylic acid. Packages made from the films by forming a blend-to-blend heatseal can be opened by a force between one and five pounds per inch width.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: February 12, 1980
    Assignee: Crown Zellerbach Corporation
    Inventor: Stephen O. Cook