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. 20, 2011
Filed:
Jul. 21, 2006
Applicants:
Hajime Maki, Niihama, JP;
Yoshiaki Takeuchi, Niihama, JP;
Inventors:
Hajime Maki, Niihama, JP;
Yoshiaki Takeuchi, Niihama, JP;
Assignee:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B24D 3/02 (2006.01); D24D 3/02 (2006.01); C09C 1/68 (2006.01); C09K 3/14 (2006.01); C04B 35/00 (2006.01); B28B 1/00 (2006.01); B28B 3/00 (2006.01); B28B 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a fine α-alumina particle having a degree of α-transformation of not less than 95%, a BET specific surface area of not less than 10 m/g, a degree of necking of not more than 30%, and a total content of Si, Fe, Cu, Na and Mg of not more than 500 ppm.