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:
Feb. 14, 1978
Filed:
Jan. 29, 1976
Applicant:
Inventors:
Sergej T Buljan, Towanda, PA (US);
Philip E Stermer, Waverly, NY (US);
Assignee:
GTE Sylvania Incorporated, Stamford, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
264 65 ; 106 735 ; 423344 ; 106 5758 ; 106 65 ; 106 73 ;
Abstract
Si.sub.3 N.sub.4 ceramics exhibiting densities and modulus of rupture values heretofore obtainable only by hot pressing are produced by pressureless sintering of powder compacts of partly amorphours, partly crystalline Si.sub.3 N.sub.4 powder containing between 5 and 60 percent by weight of crystalline material.