Patents by Inventor Edwin H. Roos

Edwin H. Roos 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 and apparatus for separating particulate material according to conductivity
    Patent number: 5161695
    Abstract: Non-magnetic, conductive particles are separated from one another on the basis of their respective electrical conductivities. This is achieved by irradiating the particles with microwave or radio frequency electromagnetic radiation and simultaneously subjecting the particles to a magnetic field. The eddy currents induced in the particles by the electromagnetic irradiation interact with the magnetic field to cause movements of the particles which are dependent on their conductivities.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: November 10, 1992
    Inventor: Edwin H. Roos