Patents by Inventor Roger Marcel Appelo

Roger Marcel Appelo 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: 7725268
    Abstract: Method and sensing module for sensing pollution of outside air. The sensing module (1) comprises an electro chemical sensing element (3), and a processor (2). A sensing module output signal is provided based on the measurement signal and a baseline signal level. The baseline signal level is adapted depending on two threshold levels (13-15). A pollution concentration value is determined from the measurement signal and a classification level of air pollution is provided as sensing module output signal. A classification level is determined using a plurality of classification threshold values and the pollution concentration values. The plurality of classification threshold values are dynamically adjustable.
    Type: Grant
    Filed: November 25, 2004
    Date of Patent: May 25, 2010
    Assignee: Sensata Technologies Holland B.V.
    Inventors: Roger Marcel Appelo, Tom Urban Artursson, Per Anders Holmberg, Nicolae Barsan, Heiko Eugen Ulmer
  • Patent number: 7467891
    Abstract: A sensor arrangement (1) for measuring a pressure and a temperature in a fluid is disclosed. The sensor arrangement (1) comprises a temperature sensitive electrical element (3) and a pressure sensing electrical element (6), the temperature sensitive electrical element (3) and pressure sensing electrical element (6) are both coupled to one side of a metallic membrane structure (4,16). The metallic membrane structure is arranged to pass on the temperature of the fluid which is at the other side of the membrane structure (4,16) to the temperature sensitive electrical element (3) and to pass on the pressure in the fluid to the pressure sensing electrical element (6). In this way a combined pressure and temperature sensor is obtained which is applicable in vehicle air-conditioning systems working with CO2 as refrigerant.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: December 23, 2008
    Assignee: Sensata Technologies, Inc.
    Inventors: Paulus Thomas Johannes Gennissen, Marc Gerard Johan Borgers, Arie-Jan Kolling, Cris Ruiz Zwollo, Roger Marcel Appelo, Werner John Peter Kleissen