Patents by Inventor Lawrence E. Conlon

Lawrence E. Conlon 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).

  • Process for the continuous extrusion forming of a plastic double-walled foam-core conduit
    Patent number: 4322260
    Abstract: The invention relates to a process for the continuous extrusion forming of a thermoplastic double-walled, foam-core conduit by the sequential steps of extrusion forming an inner plastic tube, evenly coating said inner tube with foam-core layer and extrusion forming and bonding an outer tube in contact with said foam-core layer, said outer tube being generally evenly spaced apart from said inner tube by said foam-core layer providing a plastic double-walled, foam-core conduit.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: March 30, 1982
    Assignee: Monsanto Company
    Inventor: Lawrence E. Conlon