Patents by Inventor Rita M. Vasta

Rita M. Vasta 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).

  • Method of making fibrids
    Patent number: 5209877
    Abstract: A thickener for liquids is disclosed. The thickener consists of organic polymer fibrid particles with a very small size, a very high aspect ratio, and very low bulk density. The thickener is made by drying newly-coagulated fibrid particles in a way that results in high particulate surface area.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: May 11, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arnold Frances, Lee J. Hesler, James E. Van Trump, Rita M. Vasta