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. 18, 2025
Filed:
Sep. 08, 2021
Hitachi, Ltd., Tokyo, JP;
Rintarou Minamitani, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
Prepared is a layered body comprising: an insulation plate; a base metal thin film formed on the insulation plate; and a sensing metal thin film which is formed on at least a partial area of the base metal thin film, is more easily corroded by a corrosive substance than the base metal thin film, and has a lower resistance value than the base metal thin film. A corrosive environment monitoring sensor includes this layered body, and has an opening unit in a side surface direction, and a case having a gas passage of a corrosive substance therein. The present invention detects electric resistance between two positions on the base thin film of this sensor, and determines the type of the corrosive substance from a temporal change of the electric resistance.