US Patent 7861808 Cutter for maintaining edge sharpness

Patent 7861808 was granted and assigned to Smith International on January, 2011 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Smith International

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

78618080

Patent Inventor Names

Yuelin Shen0

Youhe Zhang0

Date of Patent

January 4, 2011

Patent Application Number

113652980

Date Filed

March 1, 2006

Patent Primary Examiner

‌

Daniel P Stephenson

Patent abstract

A cutter comprising a base portion, an ultrahard layer disposed on said base portion, and at least one recessed region on an outer surface of the cutter. A start of the recessed region disposed a selected distance behind a cutting face.

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