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:
May. 03, 2005
Filed:
Jun. 03, 2003
Kazuo Hokkirigawa, Sendai, JP;
Motoharu Akiyama, Miyota-Machi, JP;
Noriyuki Yoshimura, Miyota-Machi, JP;
Kazuo Hokkirigawa, Sendai, JP;
Motoharu Akiyama, Miyota-Machi, JP;
Noriyuki Yoshimura, Miyota-Machi, JP;
Minebea Co., Ltd., , JP;
Abstract
A superfinishing grindstone suitable for precision grinding, that contains either RB (rice bran) ceramic fine grains or CRB (carbonized rice bran) ceramic fine grains or a combination of both, for use as abrasive grains. The grains of RB ceramic fine grains and CRB ceramic fine grains have multiple small pores which allow the grains to be easily removed from a finished structure. These fine grains have a high Vickers hardness, which makes them highly resistant to bending, scratching, abrasion or cutting.