Patents by Inventor Herwig Mandl

Herwig Mandl 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).

  • Pipetting and diluting apparatus
    Patent number: 4223558
    Abstract: Pipetting and diluting apparatus including an interchangeable syringe pump of predetermined volume capacity and a stepper motor for driving the syringe piston at a selected speed for dosing a selected volume of fluid. The piston stroke is calculated from the syringe volume capacity and the volume of fluid to be dosed. Control means controls the acceleration and deceleration characteristic of the piston in accordance with an exponential function dependent upon the selected piston speed and the syringe volume capacity.
    Type: Grant
    Filed: November 24, 1978
    Date of Patent: September 23, 1980
    Assignee: Beckman Instruments, GmbH
    Inventors: Paul Schmider, Herwig Mandl, Dietmar Ihlefeldt