Patents by Inventor Louis Hubertus Widdershoven

Louis Hubertus Widdershoven 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).

  • Gas-fired boiler
    Patent number: 4091768
    Abstract: A gas-fired boiler having a bed of copper finned tubes arranged between the combustion space and the flue. The ends of the tubes extend through a tube plate into a water header. The connection is sealed with a compressed gasket. For protection of the gasket, the openings in each tube plate and header for allowing the passage of tube end are arranged asymmetrically in the direction of the burner bed.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: May 30, 1978
    Assignee: Raypak Produkten B.V.
    Inventor: Louis Hubertus Widdershoven