Patents by Inventor Keichiro Koba

Keichiro Koba 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).

  • Coke compositions and process for manufacturing same
    Patent number: 4243488
    Abstract: Metallurgical coke is made from coking a blend of coal which is comprised of reformed coal and another suitable coking coal. Reformed coal hereof is preferably made by the method which comprises dissolving at least one component selected from the group consisting of bituminous coal, subbituminous coal, brown coal and lignite in a hydrocarbon solvent, and recovering a reformed coal from said solution.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: January 6, 1981
    Assignee: Mitsui Coke Co., Ltd.
    Inventors: Hidehiko Sugimura, Keichiro Koba