Patents Assigned to Toyoko Giken Co., Ltd.
  • Process for coloring concrete
    Patent number: 5534214
    Abstract: A concrete coloring material and a process for coloring concrete by means of such a concrete coloring material capable of permitting concrete to exhibit natural color or aesthetic properties while preventing concrete from being substantially discolored. Polyethylene oxide is used as a water-soluble adhesive or gIue. The oxide is mixed with a composition such as dye, pigment, a mixture thereof or the like, to thereby permit the composition to penetrate into the concrete.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: July 9, 1996
    Assignees: Toyoko Giken Co., Ltd., Nikko Chemical Institute Inc.
    Inventors: Nobuyuki Sakamoto, Takehiko Kobayashi, Takashi Horiguchi
  • Concrete coloring material and process for coloring concrete
    Patent number: 5476722
    Abstract: A concrete coloring material and a process for coloring concrete by means of such a concrete coloring material capable of permitting concrete to exhibit natural color or aesthetic properties while preventing concrete from being substantially discolored. Polyethylene oxide is used as a water-soluble adhesive or glue. The oxide is mixed with a composition such as dye, pigment, a mixture thereof or the like, to thereby permit the composition to penetrate into the concrete.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: December 19, 1995
    Assignees: Toyoko Giken Co., Ltd., Nikko Chemical Institute Inc.
    Inventors: Nobuyuki Sakamoto, Takehiko Kobayashi, Takashi Horiguchi