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:
Nov. 28, 2006
Filed:
Jun. 03, 2003
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 fine particles for cutting edges form gaps partly among them and bond loosely each other. The particles for the cutting edges are produced by growing primary particles in secondary particles, which are formed by cohesion of a large number of primary particles, with a heat treatment at a temperature of forming necks at bonding points among the primary particles.