Patents by Inventor Toshifumi Ishitobi

Toshifumi Ishitobi 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).

  • Apparatus for production of crystallizable carbonaceous material
    Patent number: 4769139
    Abstract: A heavy oil such as an atmospheric pressure residue, a reduced pressure residue of petroleum, etc. is heated to 400.degree. to 500.degree. C. to carry out polycondensation and provide a pitch containing mesophase microspheres. This pitch is once cooled to 200.degree. to 400.degree. C. and a turbulent flow is imparted thereto to cause agglomeration of the mesophase microspheres. The resulting agglomerates are separated to obtain a crystallizable material enriched with quinoline insolubles. Production of the crystallizable material is preferably conducted in a separation tank accommodating the lower part of a heating polycondensation reactor (6) and having a stirring device (12).
    Type: Grant
    Filed: February 14, 1986
    Date of Patent: September 6, 1988
    Assignee: Koa Oil Company, Limited
    Inventors: Kosaku Noguchi, Honami Tanaka, Yukimasa Kumura, Eiji Kitajima, Toshifumi Ishitobi, Hirokazu Teraoka
  • Method and apparatus for production of crystallizable carbonaceous material
    Patent number: 4488957
    Abstract: A heavy oil such as an atmospheric pressure residue, a reduced pressure residue of petroleum, etc. is heated to 400.degree. to 500.degree. C. to carry out polycondensation and provide a pitch containing mesophase microspheres. This pitch is once cooled to 200.degree. to 400.degree. C. and a turbulent flow is imparted thereto to cause agglomeration of the mesophase microspheres. The resulting agglomerates are separated to obtain a crystallizable material enriched with quinoline insolubles. Production of the crystallizable material is preferably conducted in a separation tank accommodating the lower part of a heating polycondensation reactor (6) and having a stirring device (12).
    Type: Grant
    Filed: May 26, 1982
    Date of Patent: December 18, 1984
    Assignee: Koa Oil Company, Ltd.
    Inventors: Kosaku Noguchi, Honami Tanaka, Yukimasa Kumura, Eiji Kitajima, Toshifumi Ishitobi, Hirokazu Teraoka