Patents by Inventor Hendrik Dreuning

Hendrik Dreuning 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).

  • Metal halide lamp having halide resistant current conductors
    Patent number: 6590342
    Abstract: The electric lamp has a ceramic lamp vessel (1) having a filling of rare gas and metal halide. Current conductors (2, 3) which support electrodes (4, 5) inside the discharge vessel (1) enter the discharge vessel (1) in a gastight manner through a ceramic sealing compound (6). At least one of the current conductors (2, 3) has inside the lamp vessel (1) a first, halogen-resistant part (21, 31) which is selected from tungsten silicide, molybdenum aluminide, molybdenum boride, pentamolybdenum trisilicide and combinations of at least two of these intermetallic compounds. These compounds have a coefficient of thermal expansion which corresponds to that of the discharge vessel (1). It is thereby prevented that the discharge vessel starts leaking if the ceramic sealing compound (6) extends beyond the first part (21, 31).
    Type: Grant
    Filed: December 2, 1999
    Date of Patent: July 8, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Elisabeth Onnekes-Van Der Voort, Hendrik Dreuning, Franciscus H. Van Lierop, Peter A. Seinen, Martin F. C. Willemsen, Mark Bolech