Patents by Inventor David Ernest Shipley

David Ernest Shipley 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).

  • Manufacture of coke from a coal extract
    Patent number: 3966585
    Abstract: The invention relates to a process for the production of coke having a low mineral matter content which process comprises digesting coal in a high boiling aromatic oil solvent at a temperature within the range of 350.degree.C. to 480.degree.C. separating insoluble matter from the coal digest to give a coal extract and coking the coal extract characterized in that the coal prior to digestion has a volatile matter content within the range of 13% to 28% by weight.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: June 29, 1976
    Assignee: Coal Industry (Patents) Limited
    Inventors: Michael David Gray, Geoffrey Michael Kimber, David Ernest Shipley