Patents by Inventor Martijn VISSCHER

Martijn VISSCHER 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).

  • Method and apparatus for measuring an amount of superparamagnetic material in an object
    Patent number: 10031106
    Abstract: Method and apparatus for measuring an amount of superparamagnetic material in an object, the method including a) applying a magnetic field having a first component alternating with a first period to the object and a magnetic field strength lower than a magnetic field strength at which the superparamagnetic material is driven in saturation; b) measuring a first magnetic susceptibility of the object with a detection coil; c) applying a static second component to the magnetic field for a second period being equal or larger than the first period, the strength of the magnetic field during the second period is such that the superparamagnetic material is driven towards saturation; d) measuring a second magnetic susceptibility of the object with the detection coil during the application of the static second component; and e) determining the amount of superparamagnetic material from a difference between the measured first and second susceptibility of the object.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: July 24, 2018
    Assignee: UNIVERSITEIT TWENTE
    Inventors: Sebastiaan Waanders, Martijn Visscher, Tasio Olmo Borendissi Oderkerk, Hendrikus Johannes Gradus Krooshoop, Bernard Haken
  • METHOD AND APPARATUS FOR MEASURING AN AMOUNT OF SUPERPARAMAGNETIC MATERIAL IN AN OBJECT
    Publication number: 20150338376
    Abstract: Method and apparatus for measuring an amount of superparamagnetic material in an object, the method including a) applying a magnetic field having a first component alternating with a first period to the object and a magnetic field strength lower than a magnetic field strength at which the superparamagnetic material is driven in saturation; b) measuring a first magnetic susceptibility of the object with a detection coil; c) applying a static second component to the magnetic field for a second period being equal or larger than the first period, the strength of the magnetic field during the second period is such that the superparamagnetic material is driven towards saturation; d) measuring a second magnetic susceptibility of the object with the detection coil during the application of the static second component; and e) determining the amount of superparamagnetic material from a difference between the measured first and second susceptibility of the object.
    Type: Application
    Filed: November 19, 2013
    Publication date: November 26, 2015
    Inventors: Sebastiaan WAANDERS, Martijn VISSCHER, Tasio Olmo Borendissi ODERKERK, Hendrikus Johannes Gradus KROOSHOOP, Bernard HAKEN