Patents by Inventor Marcus E. Rajchel

Marcus E. Rajchel 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 concentrating fine coal slurries
    Patent number: 5551640
    Abstract: A method for concentrating a fine coal slurry having an average particle diameter of 250 microns or less is provided in which the slurry is fed to a liquid-permeable membrane separator which provides a high rate of shear flow horizontal to the membrane. The feed may be heated to increase the flow rate, and crossflow across the membrane may be pulsed to prevent clogging of the membrane. Dispersant may also be added to improve the flow.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: September 3, 1996
    Inventor: Marcus E. Rajchel