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. 05, 2024
Filed:
Aug. 30, 2021
Ngk Insulators, Ltd., Nagoya, JP;
NGK INSULATORS, LTD., Nagoya, JP;
Abstract
A sensor element includes: an element base including a gas distribution part communicating from a gas inlet; and a leading-end protective layer including an inner layer covering an end portion and four side surfaces of the element base and an outer layer covering the inner layer and having a lower porosity than the inner layer, and a total thickness representative value, defined as an average of total thicknesses of the protective layer at a plurality of positions including a starting point, an intermediate position, and an innermost end of the gas distribution part, is 250 μm or more, and a film thickness variation degree, defined as a ratio of a difference between a maximum value and a minimum value of the total thicknesses with respect to the total thickness representative value when the value is based at 100, is 20 or less.