Patents by Inventor Shoji Shirokuni

Shoji Shirokuni 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).

  • Method of forming protective layer on concrete or mortar
    Patent number: 4937033
    Abstract: A protective layer is formed on concrete or mortar by coating a strippable paint on the inner surface of a mold, to form a strippable membrane. A transferring layer is then formed on the strippable membrane, and concrete or mortar is placed in the mold having the strippable membrane and the transferring layer. The concrete or mortar is cured in the mold. Then, the mold is removed from the cured concrete or mortar, thereby allowing the strippable membrane to transfer onto the surface of the cured concrete or mortar.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: June 26, 1990
    Assignee: Onoda Cement Co., Ltd.
    Inventors: Akira Oshio, Kazumi Jimbo, Shoji Shirokuni
  • Method of manufacturing corrosion-resistant concrete or mortar
    Patent number: 4937027
    Abstract: A method of manufacturing corrosion-resistant concrete or mortar wherein a peelable film is formed on the inner surface of a formwork, and one or two paints of asphalt, tar, and thermosetting resin paints, or resin mortar using a thermosetting resin as a binder is coated on the peelable film. Concrete or mortar is molded using the formwork, and the formwork is removed after the concrete or mortar is cured, thereby transferring the corrosion-resistant film layer together with the peelable film onto the surface of the concrete or mortar.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: June 26, 1990
    Assignee: Onoda Cement Co., Ltd.
    Inventors: Akira Oshio, Kazumi Jimbo, Shoji Shirokuni