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. 27, 2022
Toray Industries, Inc., Tokyo, JP;
Marina Taguchi, Otsu, JP;
Masayuki Hanakawa, Otsu, JP;
Gohei Yamamura, Otsu, JP;
Koichi Takada, Otsu, JP;
Hiroki Eimura, Otsu, JP;
Shigeru Aoyama, Otsu, JP;
Miku Akutsu, Otsu, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A separation membrane has high strength and low leakage property while maintaining high gas permeability using poly(4-methyl-1-pentene) excellent in chemical resistance and gas permeability. The separation membrane contains poly(4-methyl-1-pentene) as a main component, in which a ratio RA of a rigid amorphous of poly(4-methyl-1-pentene) in the separation membrane is 43% or more and 60% or less, a porosity is 30% or more and 70% or less, and a dense layer is provided on at least one surface.