Patents by Inventor Frido Roehrs

Frido Roehrs 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: 8726746
    Abstract: The invention relates to a method for checking the state of a pipette, which pipette includes a suction tube and a pipette tip. According to the invention, ultrasound is coupled into the wall of the suction tube and the damping of the ultrasonic signal is measured as a function of the frequency. The measured frequency-dependent damping is compared with at least one reference measurement or a calibration curve based on the reference measurements, in order to determine whether the pipette is in a functional condition and/or whether the pipette contains or has made contact with fluid. Furthermore, the invention relates to a pipetting method which uses the inventive method for checking the state, a suction tube arrangement for a pipetting device for pipetting fluid, and a pipetting device with which the inventive methods can be carried out.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: May 20, 2014
    Assignee: Beckman Coulter, Inc.
    Inventors: Matthias Wassermeier, Zeno Von Guttenberg, Frido Roehrs
  • Publication number: 20110000276
    Abstract: The invention relates to a method for checking the state of a pipette, which comprises a suction tube and a pipette tip. According to the invention, ultrasound is coupled into the wall of the suction tube and the damping of the ultrasonic signal is measured as a function of the frequency. The measured frequency-dependent damping is compared with at least one reference measurement or a calibration curve based on the reference measurements, in order to determine whether the pipette is in a functional condition and/or whether the pipette contains or has made contact with fluid. Furthermore, the invention relates to a pipetting method, which uses the inventive method for checking the state, a suction tube arrangement for a pipetting device for pipetting fluid and a pipetting device, with which the inventive methods can be carried out.
    Type: Application
    Filed: January 22, 2009
    Publication date: January 6, 2011
    Applicant: Beckman Coulter, Inc.
    Inventors: Matthias Wassermeier, Zeno Von Guttenberg, Frido Roehrs