Patents by Inventor Hotze Jan DE Zeeuw

Hotze Jan DE Zeeuw 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).

  • Patent number: 4115256
    Abstract: Apparatus and method for separating fly ash into its major constituents; namely, metal, carbon black, cenospheres and dust. The metal is separated by passing the fly ash through a magnetic field at least a part of which has an alternating polarity. The non-magnetic constituent is separated into conductive and dielectric constituents with a high tension separator and the conductive constituent, chiefly cenospheres, is then graded by size. The grading is effected by passing the non-magnetic, conductive fly ash constituent through a cross-flow of ionized air which suspends the cenospheres at different levels according to their weight and size. The apparatus and method has general utility, with obvious modifications, to the grading of particles other than cenospheres.
    Type: Grant
    Filed: July 21, 1976
    Date of Patent: September 19, 1978
    Inventor: Hotze Jan DE Zeeuw