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:
Jun. 16, 2026
Filed:
Jan. 04, 2022
Saint-gobain Isover, Courbevoie, FR;
Marion Chenal, Montreuil, FR;
Joël Azevedo, Marcq en Baroeul, FR;
SAINT-GOBAIN ISOVER, Courbevoie, FR;
Abstract
A method for improving the airtightness of a building or a room in a building, includes using a vapor barrier membrane on the inner face of the walls of the building or the room in the building, wherein the vapor barrier membrane is a humidity-regulating membrane including an active portion which includes a middle layer having a thickness of 2 μm to 200 μm, and consisting of a biopolymer having a water vapor permeability coefficient Pwhich increases with average relative humidity and which, when determined at 23° C. and at an average relative humidity of 25.5%, is at least 300 Barrers, and, on either side of the middle layer and in contact with the latter, two outer layers with a thickness of 100 nm to 20 μm, and consisting, independently of each other, of an organic polymer having both a water vapor permeability coefficient P.