Patents by Inventor Shigetaka Fukuoka

Shigetaka Fukuoka 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).

  • Patent number: 4542058
    Abstract: Freeze-thaw stable stoneware tile is provided, which possesses in its tile body a multiplicity of pores having a pore diameter of 0.6 micron or more and exhibiting no substantial capillary action and a multiplicity of continuous micropores having a pore diameter of 0.3 micron or less and exhibiting substantial capillary action. The relatively coarse pores are communicated with the micropores, and the micropores are communicated with the outside of the tile body. The tile is produced by compressing a mixture of a mineral flux material having a specific particle range and a plastic mineral material into a molded article having a packing rate of 0.68 or more, and then baking the molded article to a temperature at which the mineral flux material fuses.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: September 17, 1985
    Inventor: Shigetaka Fukuoka