Patents by Inventor Minoru Nagi

Minoru Nagi 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).

  • Process for the continuous production of petroleum-derived pitch
    Patent number: 4177132
    Abstract: A process for the continuous production of petroleum-derived pitch comprising the steps of subjecting a heavy fraction boiling at not lower than 150.degree. C., the heavy fraction being obtained by the steam cracking of petroleum-derived hydrocarbons, to a specified first-step heat treatment, subjecting the first-step treated fraction to a specified second-step heat treatment and then removing the light fraction from the second-step treated fraction thereby to obtain the petroleum-derived pitch.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: December 4, 1979
    Assignee: Nippon Oil Company, Ltd.
    Inventors: Seiichi Uemura, Syunichi Yamamoto, Takao Hirose, Hiroaki Takashima, Osamu Kato, Minoru Nagi