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:
Jul. 11, 1995
Filed:
May. 25, 1994
Applicant:
Inventors:
Sankar Dasgupta, Toronto, CA;
Rakesh Bhola, Toronto, CA;
Assignee:
The Electrofuel Manufacturing Co., Toronto, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501 97 ; 501 98 ; 51307 ;
Abstract
A silicon nitride based composition for manufacturing sintered ceramic articles, in particular cutting tool inserts, having improved density, hardness and fracture toughness characteristics is described. The amounts of yttrium oxide, aluminum nitride and titanium nitride contained in the silicon nitride based mixture are interrelated by a formula to attain substantially improved abrasion resistance.