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. 08, 2008
Filed:
Nov. 13, 2006
Applicants:
Hiroyuki Endoh, Tokyo, JP;
Jun Zhang, Tokyo, JP;
Toshiyuki Enomoto, Tokyo, JP;
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 3/14 (2006.01); B24D 3/00 (2006.01); B24D 5/00 (2006.01); B24D 7/00 (2006.01); B24D 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An abrasive grain including a porous particle material in which a large number of secondary particles contain gaps between primary particles bonded to each other. The secondary particles are produced by growing primary particles into secondary particles, which are formed by cohesion of a large number of primary particles, via a heat treatment at a temperature sufficient to form necks at bonding points between the primary particles.