Patents by Inventor James S. McDougall

James S. McDougall 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).

  • Tank lid
    Patent number: 5071021
    Abstract: A tank lid has a membrane of sufficient dimension to overlap the peripheral lip of a tank neck, an aperture in the membrane which opens to a space beneath an imperforate membrane support supporting the periphery of the membrane, and brackets arranged to be secured to the tank neck to be outstanding therefrom, and in use, to carry the membrane support when the lid is in a (normal) closed position.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: December 10, 1991
    Assignee: S. Smith & Son Pty. Ltd.
    Inventor: James S. McDougall