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:
Sep. 30, 1986
Filed:
Sep. 23, 1985
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., , JP;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501136 ; 501153 ;
Abstract
An alumina porcelain composition is described, consisting of a main component made of from 96 to 99.5 mol % Al.sub.2 O.sub.3 and from 4 to 0.5 mol % of CaTiO.sub.3, and MgO as an auxiliary component, said MgO being present in an amount of not more than 1 part by weight per 100 parts by weight of the main component.