Patents by Inventor Katsuhiro Wakasugi

Katsuhiro Wakasugi 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).

  • Ceramic tile produced from sludge slag
    Patent number: 5175134
    Abstract: The ceramic tile using sludge slag of the present invention comprises:______________________________________ sludge slag from 5 to 70 wt. %, agalmatolite from 20 to 90 wt. %, clay from 5 to 50 wt. %, and the balance being incidental impurities. ______________________________________The sludge slag is obtained by separating sludge from sewage, burning the thus separated sludge into ash, melting the resultant ash and solidifying the thus melted ash. The sludge slag consists essentially of: ______________________________________ silicon dioxide (SiO.sub.2) from 10 to 50 wt. %, aluminum oxide (Al.sub.2 O.sub.3) from 3 to 20 wt. %, phosphorous pentoxide (P.sub.2 O.sub.5) from 1 to 30 wt. %, calcium oxide (CaO) from 10 to 70 wt. %, magnesium oxide (MgO) from 0.5 to 20 wt. %, and iron oxide (Fe.sub.2 O.sub.3) from 5 to 25 wt. %.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: December 29, 1992
    Assignees: Senji Kaneko, Takashi Shindo, NKK Corporation, Shinagawa Shirorenga K.K.
    Inventors: Senji Kaneko, Takashi Shindo, Atsuo Inokawa, Yasushi Hoshino, Takashi Otsuka, Katsuhiro Wakasugi, Masaru Takikawa