Patents by Inventor Takahiko Kouga

Takahiko Kouga 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).

  • Lubricating composition for hot-rolling steel
    Patent number: 5437802
    Abstract: Disclosed is a lubricating composition for hot-rolling steel, which comprises a base oil or base grease and a heat-insulating agent. Especially, (A) an inorganic compound which is melted by an absorption of heat at a temperature lower than 1200.degree. C. and (B) an inorganic powder which is not melted or decomposed at a temperature lower than 1200.degree. C. and has a heat conductivity lower than 0.01 cal/cm.s. .degree.C. at room temperature and a friction coefficient smaller than 0.7 are incorporated in specific amounts singly or in combination in the composition. This lubricating composition has an excellent heat-insulating effect and effectively prevents the thermal crown of a work roll.
    Type: Grant
    Filed: June 28, 1994
    Date of Patent: August 1, 1995
    Assignees: Nippon Steel Corporation, Kyodo Yushi Co., Ltd.
    Inventors: Ryuro Kurahashi, Takahiko Kouga, Masataka Shirata, Masayoshi Sakakibara, Hiroshi Kamiyashiki