Patents by Inventor Demosthenis Chaparampopoulos

Demosthenis Chaparampopoulos 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).

  • Helical barrel rheometer
    Patent number: 5708197
    Abstract: A rheometer and method for determining rheological characteristics of a composition, the rheometer including: a housing member; a helical flange disposed on an inner surface of the housing member; a rotor disposed concentrically within the helical flange and abutting the helical flange while maintaining sliding contact with the flange, wherein the rotor and the helical flange form a helical channel; a mechanism for rotating the rotor; a mechanism for introducing a sample of the composition into one end of the channel; a mechanism for controlling removal of the sample from the other end of the channel; and a mechanism for measuring a pressure difference of the sample between an upstream location and a downstream location in the channel.
    Type: Grant
    Filed: May 7, 1996
    Date of Patent: January 13, 1998
    Assignee: Polymer Processing Institute
    Inventors: David B. Todd, Costas G. Gogos, Demosthenis Chaparampopoulos