Patents by Inventor Jutta Hartmann

Jutta Hartmann 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).

  • Process and device for determining the viscosity of liquids
    Patent number: 5365776
    Abstract: A process and a device for determining the viscosities of liquids are described, which work quickly, reliably and accurately. The process according to the invention makes use of the fact that disturbing effects are eliminated when measuring the change in the rate of flow of the liquid from the viscometer, while utilizing the change in the hydrostatic pressure during viscosity measurement and that the viscosities can be reliably determined from the measured data by the Hagen-Poiseuille law. The viscometer according to the invention is designed so that the hydrostatic pressure change during measurement is maximal.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: November 22, 1994
    Assignee: Schott Gerate GmbH
    Inventors: Jochen K. Lehmann, Roland Glatzer, Jutta Hartmann, Dieter Wagner