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:
Mar. 19, 2002
Filed:
Jan. 25, 2000
Applicant:
Inventors:
Yoichi Kawase, Omihachiman, JP;
Yoshiyuki Yamashita, Shiga-ken, JP;
Makoto Matsubara, Omihachiman, JP;
Masahiko Kawase, Yokaichi, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 3/550 ;
U.S. Cl.
CPC ...
C04B 3/550 ;
Abstract
A semiconductive ceramic is produced by sintering a semiconductive ceramic material containing a mixed powder of a lanthanum compound and a cobalt compound. The mixed powder has a specific surface area of about 3 m /g or more, an average primary particle size of about 2.0 &mgr;m or less, and an average secondary particle size of about 10 &mgr;m or less.