Patents by Inventor Johannes Wilhelmus TER Vrugt

Johannes Wilhelmus TER Vrugt 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 gas discharge lamp having two superposed luminescent layers
    Patent number: 4069441
    Abstract: A fluorescent lamp requiring a smaller amount of luminescent material than is normally required. The luminescent layer is composed of component layers, the component layers which do not face the discharge contain a mixture of the luminescent material and a white pigment which reflects ultraviolet radiation.
    Type: Grant
    Filed: September 8, 1976
    Date of Patent: January 17, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Willem Lambertus Wanmaker, deceased, Lambertus Wilhelmus Johannes Manders, Johannes Wilhelmus TER Vrugt