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:
Apr. 12, 2005
Filed:
Aug. 09, 2001
Itsuhei Ogata, Nishio, JP;
Daisuke Makino, Nishio, JP;
Kaoru Kuzuoka, Toyota, JP;
Atsushi Kurano, Kuwana, JP;
Itsuhei Ogata, Nishio, JP;
Daisuke Makino, Nishio, JP;
Kaoru Kuzuoka, Toyota, JP;
Atsushi Kurano, Kuwana, JP;
Nippon Soken Inc., Aichi, JP;
Denso Corporation, Kariya, JP;
Abstract
A highly accurate reduction resistant thermistor exhibiting stable resistance characteristics even under conditions where the inside of a metal case of a temperature sensor becomes a reducing atmosphere, wherein when producing the thermistor comprised of a mixed sintered body (M1 M2)O.AO, the mean particle size of the thermistor material containing the metal oxide, obtained by heat treating, mixing, and pulverizing the starting materials, is made smaller than 1.0 μm and the sintered particle size of the mixed sintered body, obtained by shaping and firing this thermistor material, is made 3 μm to 20 μm so as to reduce the grain boundaries where migration of oxygen occurs, suppress migration of oxygen, and improve the reduction resistance.