Patents Assigned to Toro Ganryo Kogyo Co., Ltd. - Justia Patents Search

Patents Assigned to Toro Ganryo Kogyo Co., Ltd.

Method of coating inorganic pigments (ultramarine and bronze powder) with dense amorphous silica

Patent number: 4375373

Abstract: A stable inorganic pigment having the surface thereof a continuous coating of fine amorphous silica.

Type: Grant

Filed: December 1, 1981

Date of Patent: March 1, 1983

Assignees: Toro Ganryo Kogyo Co., Ltd., Nippon Chemical Industrial Co., Ltd.

Inventors: Nobuyoshi Abe, Kiyoshi Kanemaru, Minoru Yokoyama