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:
Apr. 06, 1999
Filed:
Nov. 03, 1997
Applicant:
Inventor:
James M Olson, Londonderry, NH (US);
Assignee:
Saint-Gobain Industrial Ceramics, Inc., Worcester, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05H / ;
U.S. Cl.
CPC ...
427309 ; 427314 ; 427457 ; 427532 ; 427533 ; 427534 ; 427535 ; 427540 ; 427569 ; 427573 ; 427577 ;
Abstract
A process for coating a tungsten carbide base material substrate with CVD diamond film includes carburization and gas-assisted vaporization of cobalt from the surface with simultaneous recrystallization of surface grains of tungsten carbide to change their stoichiometry for improved adherence. Also disclosed is a WC-Co cutting tool having a relatively fine WC grain size and coated with adherent CVD diamond.