Patents by Inventor Pieter G. van Engen

Pieter G. van Engen 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).

  • Electrodeless low-pressure discharge lamp
    Patent number: 4927217
    Abstract: The electrodeless low-pressure discharge lamp has a lamp vessel (1) with a protuberance (2), in which an electrical coil (4) is situated around a soft magnetic body (3). A heat-resistant envelope (5) separates the coil (4) from the body (3).
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: May 22, 1990
    Assignee: U.S. Philips Corp.
    Inventors: Anthony Kroes, Pieter G. Van Engen
  • Electrodeless low-pressure discharge lamp with thermally isolated magnetic core
    Patent number: 4922157
    Abstract: The electrodeless low-pressure discharge lamp comprises a discharge vessel (1) having an inwardly extending protuberance (2) and an evacuated outer bulb (5) having a protuberance (6) projecting into the protuberance (2). A soft magnetic body (3) is arranged in the protuberance (6). It is a heat-resistant envelope (22) and is surrounded by an electrical coil (4) outside the envelope (22).
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: May 1, 1990
    Assignee: U.S. Philips Corp.
    Inventors: Pieter G. Van Engen, Anthony Kroes
  • Magneto-optical device
    Patent number: 4650290
    Abstract: A magneto-optical device for varying the state of polarization of a reflected or transmitted light beam having a wavelength which lies in particular in the range between 0.6 and 0.9 microns. The device has a magneto-optically active layer formed from a platinum-manganese-antimony alloy, at least 80 atomic percent of which has the composition Pt.sub.1 Mn.sub.1 Sb.sub.1 and has a C1.sub.b crystal structure.
    Type: Grant
    Filed: January 17, 1985
    Date of Patent: March 17, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Pieter G. van Engen, Kurt H. J. Buschow, Ronald Jongebreur