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:
Dec. 15, 1992
Filed:
Nov. 13, 1991
Norihiro Sato, Shimoneseki, JP;
Takao Hayashi, Shimoneseki, JP;
Nobuyoshi Kasahara, Sayama, JP;
Wolf-Dieter Griebler, Moers, DE;
Jorg Hocken, Meerbusch, DE;
Gunther Rudolph, Neuberg, DE;
Mitsui Mining & Smelting Co. Ltd., Tokyo, JP;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A process for preparing a conductive, acicular zinc oxide, comprising the steps of: preparing a zinc oxide slurry comprising an acicular zinc oxide, a salt of at least one metal selected from the group consisting of aluminum, gallium, indium and tin and an aqueous solution of an alkali metal hydroxide and having a pH value maintained at 10 to 13, adjusting the pH value of said zinc oxide slurry to 5 to 9 while stirring, aging the slurry, separating the zinc oxide present in the slurry by filtration, washing and drying the separated zinc oxide, and then firing the dried zinc oxide at 500.degree. to 700.degree. C. in a reducing atmosphere.