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, 2020
Filed:
Aug. 17, 2016
Ngk Insulators, Ltd., Nagoya-shi, Aichi, JP;
NGK INSULATORS, LTD., Nagoya, JP;
Abstract
A heater section includes a plate-like ceramic body (a first substrate layer, a second substrate layer, and a third substrate layer) having a longitudinal direction (front-rear direction) and a short-length direction (left-right direction), and a heaterdisposed within the plate-like ceramic body and including a lead sectionand a heating sectionconnected to the lead section. The heating sectionincludes a straight portionextending along the longitudinal direction, and a lead side curved portionconnected to one of the ends of the straight portioncloser to the lead section. The lead side curved portionhas a lower resistance per unit length than the straight portionat one or more temperatures in the range of 700° C. to 900° C.