Patents by Inventor Hermanus M. Jongerius

Hermanus M. Jongerius 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).

  • Low-pressure mercury vapor discharge lamp
    Patent number: 4233653
    Abstract: Low-pressure mercury vapor discharge lamp having a luminescent layer and a conductive transparent coating. An amalgam is disposed in the discharge space to reduce loss of light owing to greying of this layer.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: November 11, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Hermanus M. Jongerius, Rein W. van der Wolf