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:
Mar. 03, 2026
Filed:
Apr. 11, 2023
Senseair Ab, Delsbo, SE;
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Bertil Hök, Västerås, SE;
Jonas Ljungblad, Västerås, SE;
Hiromi Fujita, Tokyo, JP;
Tatsushi Yagi, Tokyo, JP;
Floria Ottonello Briano, Stockholm, SE;
SENSEAIR AB, Delsbo, SE;
ASAHI KASEI MICRODEVICES CORPORATION, Tokyo, JP;
Abstract
Gas detecting devices and in particular volatile substance sensors such as breath alcohol devices sensors. The semiconductor gas sensor device includes a laser structure and an optical waveguide resonator formed in a same compound semiconductor which includes at least one optical emission layer and one optical propagation layer. The optical waveguide resonator is formed in the optical propagation layer and is to its greater part separated from the remaining portion of the optical propagation layer. The laser structure is provided adjacent to a portion of the optical waveguide resonator and arranged to transmit electromagnetic radiation at a specific wavelength band to the optical waveguide resonator arranged to resonate at that specific wavelength band.