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:
Dec. 16, 1986
Filed:
Jan. 21, 1986
Applicant:
Inventor:
Robert W Wolfe, Wysox, PA (US);
Assignee:
GTE Products Corporation, Stamford, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501 97 ; 252 122 ; 501 98 ; 501152 ;
Abstract
An article is disclosed which is made of silicon nitride based material consisting essentially of in percent by weight about 6% yttrium oxide and the balance silicon nitride. The article has open porosity of from about 37% by volume at which level the strength of the article is about 15 ksi to about 10% by volume open porosity at which level the strength of the article is about 72 ksi. The article can have within its open porosity a lubricating material.