Patents by Inventor Claude F. Elgner

Claude F. Elgner 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).

  • Air conduits and process therefor
    Patent number: 4320084
    Abstract: Air conduits or ducts, including convoluted or bellows-type ducts, are prepared by molding a resinous mixture consisting essentially of a polypropylene and a polystyrene-polyolefin block copolymer. Inert fillers can be present in the mixture.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: March 16, 1982
    Assignee: Salga Associates Limited & Company
    Inventor: Claude F. Elgner