Patents by Inventor John R. Ewbank

John R. Ewbank 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).

  • Continuous displacement chromatographic separation
    Patent number: 3971842
    Abstract: In a plant for uranium enrichment using a cascade of ion exchange beds, each bed operates more efficiently because an annular chamber is rotated about a stationary annular ion exchange bed at a speed corresponding to the speed of migration of a region so that, with respect to such rotating chamber, each of the regions of a system remains substantially stationary. An aqueous solution of ferric chloride is pumped to the ferric region and flows forwardly to the forwardly moving rear boundary of the uranium region.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: July 27, 1976
    Assignee: Atlantic Richfield Company
    Inventor: John R. Ewbank