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. 13, 1997
Filed:
Sep. 28, 1994
Applicant:
Inventors:
Robert W Britzke, Rogers, AR (US);
Jimmy Eason, Rogers, AR (US);
Zhigang Fang, The Woodlands, TX (US);
Assignee:
Rogers Tool Works, Inc., Rogers, AR (US);
Primary Examiner:
Int. Cl.
CPC ...
C23C / ;
U.S. Cl.
CPC ...
148208 ; 148514 ; 134 39 ;
Abstract
A cutting tool is decarburized by placing the tool in a protective environment, heating in this environment to a temperature of 600.degree.-1100.degree. C., and maintaining this temperature for a period of 15-120 minutes. The cutting tool may be a cemented carbide microdrill which contains primary cutting edges which form an angular surface on the forward end of a rake surface at the cutting tip, and a radius surface which extends from the angular surface to a flank surface which extends from an outer diameter of the cutting tip to an axis of symmetry of the tool.