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:
Sep. 17, 1996
Filed:
Sep. 16, 1994
Applicant:
Inventors:
Assignee:
Showa Shell Sekiyu K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02C / ;
U.S. Cl.
CPC ...
241 17 ; 241 21 ;
Abstract
A method for producing ultra fine particles is disclosed, wherein the method includes wet grinding particles with a media agitation mill, wherein ceramic particles having an average diameter of about 300 .mu.m or smaller are used as grinding media in the media agitation mill. Desirably, the media has an average particle diameter standard deviation of 15 or smaller, a sphericity of 1.07 or smaller, and a density of 6.0 g/cm.sup.3 or more.