Patents by Inventor Hubertina Maria Ulenaers

Hubertina Maria Ulenaers 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).

  • Red-colored electric lamp
    Patent number: 7518314
    Abstract: The invention relates to electric lamps and more particularly to automotive signal lamps. A glass composition is described for use in electric lamps, which glass is red colored. The glass composition comprises copper between 0.1 and 2% by weight, tin between 0.1 and 2% by weight, barium between 7 and 11% by weight, and strontium between 1 and 5% by weight.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: April 14, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Maarten Walter Steinmann, Hubertina Maria Ulenaers, Simon Krijnen, Simon Flink