Patents by Inventor Yoshio Aizawa

Yoshio Aizawa 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).

  • Colorable binder composition
    Patent number: 5340869
    Abstract: A binder composition comprising a petroleum resin, an aromatic heavy mineral oil, a thermoplastic elastomer, an ethylene copolymer and a waxy substance has a high viscosity at 60.degree. C. and a low viscosity at high temperatures, and can provide a mixture together with aggregate having remarkably high compressive strength.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: August 23, 1994
    Assignee: Nippon Oil Company, Ltd.
    Inventors: Masao Isobe, Yoshio Aizawa, Kenichi Kogo, Chuzo Yoshida
  • Asphalt compositions for pavement
    Patent number: 5328943
    Abstract: An asphalt composition for use in road pavements is disclosed which comprises chiefly of an asphalt of natural or petroleum origin, a thermoplastic elastomer and/or a styrene-butadiene rubber and a low molecular weight polypropylene. These components are premixed or plant-mixed to form a reformed asphalt which is mixed with an aggregate to provide a paving material having increased compression strength, increased low temperature viscosity and decreased high temperature viscosity.
    Type: Grant
    Filed: July 22, 1992
    Date of Patent: July 12, 1994
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Masao Isobe, Yoshio Aizawa