Patents by Inventor Nicholas W. Tschoegl

Nicholas W. Tschoegl 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).

  • Dynamic rheometer
    Patent number: 3933032
    Abstract: The dynamic mechanical properties of polymeric materials can be measured either in uniaxial compression or in flexure as a function of frequency over a wide frequency as well as temperature range, by using a piezoelectric driver to apply a displacement to a sample and a piezoelectric pickup to pick up the forces transmitted through the sample together with electrical circuitry whereby the amplitude ratio and phase angle between drive and pickup signals may be read.
    Type: Grant
    Filed: September 1, 1971
    Date of Patent: January 20, 1976
    Assignee: California Institute of Technology
    Inventor: Nicholas W. Tschoegl