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:
Oct. 22, 2013
Filed:
May. 11, 2009
Applicants:
Tatsuya Kato, Nagoya, JP;
Hiroyuki Takahashi, Kasugai, JP;
Shigeru Taga, Nagoya, JP;
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A ceramic substrate has a base material composed of an amorphous phase and particles composed of a crystalline phase and dispersed in the base material. Some of the particles are permitted to protrude from at least one surface of the base material. The amorphous phase can contain glass and the crystalline phase can contain a crystalline filler.