Patents by Inventor Martinus H. Van Maaren

Martinus H. Van Maaren 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).

  • Electro-optical display device with ionizable gas
    Patent number: 6169364
    Abstract: A display device comprising a channel plate (39) having channels (30, 30′, 30″) containing an ionizable gas (33), and walls of the channels (30, 30′, 30″) being provided with electrodes (31, 32) for selectively ionizing the ionizable gas (33) during operation. The display device further includes an electro-optical layer and means for activating said electro-optical layer. The display device is characterized in that the ionizable gas (33) comprises a gas of the group formed by hydrogen, deuterium and deuterium hydrogen, and in that the display device is provided with means for supplying hydrogen, deuterium or deuterium hydrogen to the ionizable gas. Suitable materials include VZ2, LZ3, PdZ0.6, LaNi5Z6, LaNi2Zx, LaCo5Zx, Zr—Mn—Zx or Pd—Ag—Zx, where L is a lanthanide and Z is hydrogen and/or deuterium. The means are preferably situated in a recess (48) around the channel plate (39), in the pump connection (45) and/or they form part of the electrodes (31, 32).
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: January 2, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Udo Van Slooten, Martinus H. Van Maaren, Petrus H. L. Notten
  • Charging device for charging rechargeable batteries with temperature-dependent termination of the charging process
    Patent number: 5604419
    Abstract: A charging device for charging a rechargeable battery including a current supplier for supplying charging current to a battery having an initial temperature at the beginning of the supply of charging current, a selector for selecting an end temperature based on a temperature range the initial temperature is in and a current terminator for terminating the supply of charging current when a battery reaches the end temperature. A rechargeable battery including a strain gauge having a temperature coefficient differing from a temperature coefficient of the battery housing is also provided.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: February 18, 1997
    Assignee: U.S. Philips Corporation
    Inventors: Oedilius J. Bisschop, Johann R. G. C. M. Van Beek, Eduard E. A. Gillissen, Martinus H. Van Maaren