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:
Nov. 06, 2012
Filed:
Sep. 17, 2010
Yuji Akatsuka, Handa, JP;
Yoshinobu Goto, Nagoya, JP;
Yuji Akatsuka, Handa, JP;
Yoshinobu Goto, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A resistive heating elementhas a higher molybdenum carbide content in a central portionthan in a peripheral portion. Since molybdenum carbides have a low temperature coefficient of resistance compared to molybdenum, the amount of heat generated in the central portionof the resistive heating elementdoes not increase as much as in the peripheral portioneven when the temperature is increased, and the increase in difference in temperature between the peripheral portionand the central portioncan be suppressed. In other words, generation of hot spots near the center can be suppressed and a good uniform heating property in a wide range of operation temperatures can be obtained.