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. 08, 2026
Filed:
Oct. 19, 2023
Seiko Epson Corporation, Tokyo, JP;
Yuta Horiuchi, Suwa, JP;
Hiromu Miyazawa, Azumino, JP;
Yasutaka Matsumoto, Suwa, JP;
Oshi Iwakami, Chino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A gas separation membrane that separates, by selective transmission, carbon dioxide from a mixed gas containing the carbon dioxide and nitrogen, the gas separation membrane including: a first layer; and a second layer provided at one surface of the first layer and composed of a compound having carbon dioxide separation ability, wherein an average thickness of the second layer is smaller than an average thickness of the first layer, and the second layer satisfies 0.56<ξ, where an activity coefficient of nitrogen in the second layer, calculated by the COSMO-RS method, is γ, an activity coefficient of carbon dioxide in the second layer is γ, and a separation performance parameter of the second layer at 25° C. is ξ=ln(γ)−ln(γ).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile