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:
Oct. 16, 2001
Filed:
Jun. 09, 1995
Masahide Mohri, Ibaraki, JP;
Hironobu Koike, Ibaraki, JP;
Shinichiro Tanaka, Ibaraki, JP;
Tetsu Umeda, Ibaraki, JP;
Hisashi Watanabe, Ibaraki, JP;
Kunio Saegusa, Tsukuba-gun, JP;
Akira Hasegawa, Ibaraki, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A metal oxide powder except &agr;-alumina, is disclosed comprising polyhedral particles having at least 6 planes each, a number average particle size of from 0.1 to 300 &mgr;m, and a D,/D,ratio of 10 or less where D,and D,are particle sizes at 10% and 90% accumulation, respectively from the smallest particle size side in a cumulative particle size curve of the particles. This metal oxide powder contains less agglomerated particles, and has a narrow particle size distribution and a uniform particle shape.