Patents by Inventor Paul A. Rockar

Paul A. Rockar 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).

  • Simultaneously laminating and press polishing plastic laminated transparencies
    Patent number: 4174241
    Abstract: The present invention relates to simultaneous press polishing and lamination of laminated plastic transparencies such as are used in aircraft as aircraft windshields or aircraft canopies. The present invention is especially useful to minimize deviations from surface smoothness of the all plastic laminates due to the entrapment of air that form air pockets within a flexible evacuating bag within which an assembly to be press polished and laminated is inserted during its fabrication.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: November 13, 1979
    Assignee: PPG Industries, Inc.
    Inventors: Paul A. Rockar, Melvin K. Law, Thomas W. Hawk