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. 15, 1986
Filed:
Feb. 14, 1984
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., , JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501128 ; 501153 ;
Abstract
Sintered alumina product comprising 90 to 98 wt % of alumina as the main component, and which further contains as auxiliary components not more than 1 wt % of BaO and 1 to 10 wt % of a composite oxide having the composition included within the hexagon ABCDEF (except for the line AF) in an SiO.sub.2 -CaO-MgO phase diagram, the respective apexes having the following definitions: