The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 15, 1982
Filed:
Dec. 31, 1979
Applicant:
Inventors:
Nobuyoshi Abe, Urawa, JP;
Syozo Takatsu, Kamagaya, JP;
Kiyoshi Kanemaru, Urawa, JP;
Minoru Yokoyama, Tokyo, JP;
Assignees:
Toho Ganryo Kogyo Co., Ltd., Tokyo, JP;
Nippon Chemical Industrial Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09C / ;
U.S. Cl.
CPC ...
106305 ; 1062 / ; 1063 / ; 106309 ;
Abstract
A process for preparing a stable inorganic pigment coated with a fine amorphous silica which comprises forming a silica sol in an aqueous prepared slurry of an inorganic pigment by reacting an alkali silicate solution with one or more acid gases so that a fine silica sol covers the surfaces of the particles of the inorganic pigment.