Patents by Inventor Katsumi Tsuboi

Katsumi Tsuboi 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).

  • Unleaded high-octane gasoline composition
    Patent number: 6187171
    Abstract: An unleaded high octane gasoline composition exhibiting reduced gum formation and improved air intake system and combustion chamber cleanliness is provided comprising at least (A) one reformate fraction produced by a continuous regeneration type reformer and/or (B) at least one reformate fraction produced by a fixed bed type reformer, said unleaded high octane gasoline composition satisfying the following conditions: Z=({fraction (1/100)})[&Sgr;(ax)+({fraction (1/9)})&Sgr;(by)]<0.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: February 13, 2001
    Assignee: Tonen Corporation
    Inventor: Katsumi Tsuboi