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:
Jul. 06, 1999
Filed:
Jul. 31, 1997
Applicant:
Inventors:
Takao Hayashi, Yamaguchi, JP;
Norihiro Sato, Yamaguchi, JP;
Nobuyoshi Kasahara, Saitama, JP;
Katsuhiko Yoshimaru, Saitama, JP;
Kouichi Kawaratani, Yamaguchi, JP;
Assignee:
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
4272133 ; 42721331 ; 427215 ; 427216 ; 427217 ;
Abstract
A electrically-conductive barium sulfate filler and a method for preparing same are herein disclosed and it comprises a particulate core material composed of barium sulfate provided thereon with a coating film of tin dioxide which may be optionally doped with niobium or tentalum, the bare core material free of coating film having a specific surface area ranging from 0.1 to 150 m.sup.2 /g and the film having a thickness ranging from 2 to 80 nm.