Patents by Inventor Paulus A. M. Vermeulen

Paulus A. M. Vermeulen 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).

  • Patent number: 5994837
    Abstract: A light-transmitting discharge vessel (10) encloses a discharge space (11) in a gastight manner. The discharge space comprises mercury as well as one or several inert gases. The lamp is in addition provided with an electric coil (20) for generating a high-frequency magnetic field in the discharge space. The discharge lamp is provided with an auxiliary amalgam (40) which is provided on an elongate carrier (41) which is mechanically coupled to a tube (50) which issues into the discharge space. The auxiliary amalgam (40) covers the carrier (41) at least substantially entirely.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: November 30, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Michel J. M. Willems, Alphons M. Klaassen, Paulus A. M. Vermeulen
  • Patent number: 5216323
    Abstract: Low-pressure mercury vapor discharge lamp for suntanning purposes comprising a tubular discharge vessel which is provided on the inside with a first luminescent layer comprising a first luminescent material which emits mainly UVA and with a second luminescent layer which comprises a second luminescent material which emits mainly UVA, the two luminescent materials also showing mutually different UVB emission contents. At least one of the two luminescent layers extends over only part of the circular circumference of the discharge vessel with the object of obtaining different quantities of UVB radiation emission in different transverse directions of the lamp. The luminescent material having the lowest UVB emission is disposed on the wall of the discharge vessel and absorbs a portion of the UVB emission from the other luminescent material which is disposed closest to the discharge and has the higher UVB emission.
    Type: Grant
    Filed: April 7, 1992
    Date of Patent: June 1, 1993
    Assignee: U.S. Philips Corporation
    Inventors: Johannes P. M. Baaten, Paulus A. M. Vermeulen