Patents by Inventor Marinus G. Vernooij

Marinus G. Vernooij 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).

  • Discharge lamp circuit heat-sinked to the lamp cap
    Patent number: 4644226
    Abstract: A high-pressure discharge lamp comprising a discharge vessel (3) enclosed by an outer envelope (1) provided with a neck (10) which is adjoined by a sleeve (20) of a lamp cap (2). The lamp cap (2) accommodates an electrical circuit provided with a semiconductor switching element (26) which controls the discharge current in the operating condition of the lamp. The semiconductor switching element (26) is provided with a cooling member (24) which is preferably secured to the sleeve (20). This lamp may be used without further expedients in combination with a stabilization ballast not adapted to the lamp.
    Type: Grant
    Filed: May 13, 1986
    Date of Patent: February 17, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Marinus G. Vernooij, John A. J. Daniels