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. 13, 2016
Filed:
Dec. 12, 2014
Applicants:
Kiyotaka Sawada, Kanagawa, JP;
Jun Zhang, Kanagawa, JP;
Inventors:
Kiyotaka Sawada, Kanagawa, JP;
Jun Zhang, Kanagawa, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24D 11/00 (2006.01);
U.S. Cl.
CPC ...
B24D 11/00 (2013.01);
Abstract
A polishing sheet comprising a plurality of convex portions which protrudes from a sheet surface and includes an upper surface which is in parallel to the sheet surface is disclosed. A plurality of abrasive grains made by a granular porous body in which a number of primary particles are partially bonded to each other and include a void in between is arranged at least on the upper surface of the convex portion.