Patents by Inventor John A. Hamshar, III

John A. Hamshar, III 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: 4389388
    Abstract: Petroleum coke is processed to reduce the sulfur content. Ground coke is contacted with hot hydrogen, under pressurized conditions, for a residence time of about 2 to 60 seconds. The desulfurized coke is suitable for metallurgical or electrode uses.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: June 21, 1983
    Assignee: Cities Service Company
    Inventors: Charles P. Goforth, John A. Hamshar, III