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:
Sep. 01, 1987
Filed:
Apr. 20, 1981
Yasuo Shin, Nara, JP;
Takeshi Tanabe, Higashiosaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A SnO.sub.2 semiconductor gas sensor for use in a cooking apparatus to detect the cooking condition is manufactured through an aging treatment for stabilizing the operation of the SnO.sub.2 semiconductor gas sensor. In the aging treatment, the SnO.sub.2 semiconductor gas sensor is disposed in a gas ambience including a gas which is developed in the cooking apparatus. More specifically, the gas ambience includes a dimethyl siloxane gas which is developed from a heated silicone compound. The gas ambience in the aging treatment is held at a high temperature, for example, 150.degree. C. through 250.degree. C. to provide the SnO.sub.2 semiconductor gas sensor of which the resistance value and sensitivity are stable even in the high temperature ambience when oven cooking is performed by the cooking apparatus.