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:
Mar. 02, 2009
Shohei Chida, Pranakornsri Ayutthaya, TH;
Masami Kaneko, Chiyoda-ku, JP;
Mitsuhiko Komakine, Chiyoda-ku, JP;
Shohei Chida, Pranakornsri Ayutthaya, TH;
Masami Kaneko, Chiyoda-ku, JP;
Mitsuhiko Komakine, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
An apparatus for polishing an edge surface of a glass substrate for magnetic recording media. The apparatus includes a grindstone including abrasive grains mixed with a resin. The grindstone is configured to polish at least the edge surface of the glass substrate. The grindstone has a reentrant groove with a bottom surface and sidewall surfaces such that the bottom surface of the reentrant groove contacts the edge surface of the glass substrate and the sidewall surfaces of the reentrant groove contacts chamfered sidewalls of the glass substrate. The reentrant groove and sidewall surfaces are formed in the resin of the grindstone by pressing the glass substrate into the resin of the grindstone with a force higher than a pressing force during polishing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile