Patents by Inventor Pieter A. Naastepad

Pieter A. Naastepad 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).

  • Heating device
    Patent number: 4136733
    Abstract: An isothermal heating device comprises an annular tubular body providing a heating chamber for objects. Between the inner wall and the outer wall of this tubular body there is provided a plurality of separate ducts which are situated in a ring-shape about the heating chamber and which extend parallel to the tubular body axis. These ducts contain an evaporable heat transport medium and are in communication with each other preferably at one end of the tubular body. Such interconnection is in turn connected with a gas buffer reservoir containing an inert control gas.
    Type: Grant
    Filed: January 20, 1978
    Date of Patent: January 30, 1979
    Assignee: U.S. Philips Corporation
    Inventors: George A. A. Asselman, David B. Green, Adrianus P. J. Castelijns, Pieter A. Naastepad, Jacob W. DE Ruiter