Patents by Inventor Herbert Greenfield

Herbert Greenfield 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).

  • Dispersing apparatus with wire wheel impeller
    Patent number: 4630932
    Abstract: An apparatus for dispersing pigment in a liquid comprising: a mixing vessel, a stirrer shaft with affixed impeller, a motor for rotating the shaft, and support structure for positioning the rotatable shaft and impeller within the vessel; with the improvement of using as an impeller a wire wheel of radially extending stiff wires, the wheel having corrugated sides formed from the outermost layers of wires. A method of dispersing solids using the apparatus of the invention is also described.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: December 23, 1986
    Inventors: Anthony J. Revelli, Herbert Greenfield