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:
Jan. 07, 1992
Filed:
Apr. 16, 1990
Applicant:
Inventors:
Atsushi Ochi, Tokyo, JP;
Seiji Takahashi, Tokyo, JP;
Kazuaki Utsumi, Tokyo, JP;
Masato Shirakata, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ;
U.S. Cl.
CPC ...
501135 ; 501134 ; 501136 ; 423606 ; 423635 ;
Abstract
A manufacturing method for dielectric ceramic compositions of lead-based perovskite containing lead magnesium tungstate [Pb(Mg.sub.1/2 W.sub.1/2)O.sub.3 ] as a component which is characterized in that magnesium tungstate powder [MgWO.sub.4 ] is used as a starting material instead of MgO and WO.sub.3 powder.