Patents by Inventor R. James Kersting

R. James Kersting 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 blow molding on thermoforming a plastic hardskin/softcore multilayer sheet material
    Patent number: 4810457
    Abstract: A process is disclosed for thermoforming a sheet or billet comprised of at least one outer layer of polypropylene and at least one adjacent layer of a random copolymer of propylene and ethylene and, optionally, a barrier layer. The sheet or billet is thermoformed into rigid articles which do not significantly distort under retort conditions by forming the sheet or billet at a temperature below the sticky point of the polypropylene layer and above the sheet distortion temperature.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: March 7, 1989
    Assignee: Rampart Packaging Inc.
    Inventor: R. James Kersting
  • Retortable containers with exterior modified polystyrene cap layer
    Patent number: 4798750
    Abstract: A multilayer structure and container formed therefrom is disclosed which comprises a layer of a polystyrene polymer modified with a carboxylic acid or carboxylic anhydride and a layer of an ethylene vinyl alcohol copolymer.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: January 17, 1989
    Assignee: Rampart Packaging Inc.
    Inventor: R. James Kersting
  • Resin-coated glass articles
    Patent number: 4153171
    Abstract: Articles of glass are coated with copolymers of ethylene and 2-norbornenes or terpolymers of ethylene, 2-norbornenes and 1-butene. The coating serves to reduce shatter of the glass and its scatter on breaking. Resin-coated bottles are especially useful for bottling carbonated beverages to prevent flying glass if the bottle is dropped or explodes.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: May 8, 1979
    Assignee: Arco Polymers, Inc.
    Inventors: R. James Kersting, James J. Harris