Patents by Inventor Gretta Heismeyer

Gretta Heismeyer 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).

  • Meltblown composites and uses thereof
    Patent number: 6197709
    Abstract: This invention is directed towards a porous composite having an inlet face and an exit face and further comprises intermingled meltblown fibers and staple fibers which define a density gradient from coarse pores at the inlet face to fine pores at the exit face.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: March 6, 2001
    Assignee: The University of Tennessee Research Corporation
    Inventors: Peter Ping-Yi Tsai, Charles B. Hassenboehler, Larry C. Wadsworth, Gretta Heismeyer