Patents by Inventor Jacobus Johannes Chretien Coumans

Jacobus Johannes Chretien Coumans 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).

  • Electric lamp
    Patent number: 7378798
    Abstract: An electric lamp has a lamp vessel accommodating an electric element. The element is connected to current conductors including molybdenum portions which have a coating of material chosen from the group of chromium-manganese, chromium-cobalt, chromium-iron and chromium-boron alloys as a protection against oxidation.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: May 27, 2008
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Jacobus Johannes Chretien Coumans, Marten Willem Schuiteman, Wilhelmus Jacobus Johannes Welters
  • Electric lamp
    Publication number: 20050174058
    Abstract: The electric lamp (1) has a lamp vessel (2), wherein an electric element (3) is accommodated. Said element is connected to current conductors (4), molybdenum portions (5) and (21) which have a coating of material chosen from the group consisting of chromium-manganese, chromium-cobalt, chromium-iron and chromium-boron alloys as a protection against oxidation.
    Type: Application
    Filed: May 21, 2003
    Publication date: August 11, 2005
    Inventors: Jacobus Johannes Chretien Coumans, Marten Schuiteman, Wilhelmus Jacobus Welters