Patents by Inventor Hans Van Spang

Hans Van Spang 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).

  • Publication number: 20070247050
    Abstract: The invention relates to an electric lamp comprising a light-transmitting pear shaped lamp vessel (1) with a top part (8) and a centre part (9) in which a light source (2) is arranged in the centre part, said electric lamp provided with a light-absorbing medium (6) exhibiting a spectral transition in the visible range, at least a part of the lamp vessel (1) being provided with an interference film (5), wherein the light absorbing-medium (6) provided at the top part of the vessel (8) has an absorption, which is 1.5 to 5 times the absorption of the light-absorbing medium provided at the centre part (9) of the vessel.
    Type: Application
    Filed: August 10, 2005
    Publication date: October 25, 2007
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventors: Hans Van Spang, Christian Balac, Jean-Rene Cotel