Patents by Inventor Jennifer A. Stein

Jennifer A. Stein 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).

  • Substantially inert clay product and process for manufacture
    Patent number: 6020282
    Abstract: A substantially dust-free, inert absorbent derived from clay is described. Raw clay having strong surface acidity sites is combined with a metal salt, then heat treated to produce vitrified clay granules suitable as a carrier for labile chemical or biological materials.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: February 1, 2000
    Assignee: Oil-Dri Corporation of America
    Inventors: Dennis R. Taylor, Jennifer A. Stein
  • Apparatus for making granular absorbent from fibrous materials
    Patent number: 5094604
    Abstract: An apparatus suitable for making a granular absorbent from cellulosic fibrous material includes a housing which defines an elongated internal cavity, and an inlet and an outlet communicating with the internal cavity. A rotatably driven shaft extends within the cavity of the housing, with the apparatus including an impeller arrangement mounted on the shaft for rotation therewith. The impeller arrangement includes resiliently flexible bristles which cooperate with the interior surface of the internal cavity for effecting agitation, blending, and agglomeration of the cellulosic fibrous feed stock. A pellet-like granular absorbent is produced.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: March 10, 1992
    Assignee: Oil-Dri Corporation of America
    Inventors: Domingo Chavez, Loukia Papadopoulos, Jennifer A. Stein, Rudolph C. Valenta