# US 11,992,584 B2 · Device for diffusion of volatile substances > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,992,584 B2 - Document ID: US11992584B2 - Status: Granted - Kind: B2 - Application number: 16/956,629 - Filed: 2018-12-20 - Published: 2020-12-24 - Granted: 2024-05-28 - Earliest claimed: 2017-12-22 - Assignees: Zobele Holding SPA - Applicants: Zobele Holding, S.P.A. - Inventors: Livio Sordo; Cedric Morhain; Stefano Deflorian - Web page: https://patentgrep.com/patent/US11992584B2 ## CPC - A61L 9/12: Apparatus, e.g. holders, therefor - B01D 50/00: Combinations of methods or devices for separating particles from gases or vapours - A61L 2209/131: Semi-permeable membranes - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract A device for diffusion of volatile substances that includes a container for containing volatile substances, including the container, an aperture defining a sealing area, and a multilayer structure placed on the aperture. The multilayer structure includes a microporous membrane through which the volatile substances are diffused and a barrier layer that is removed before a first use. The multilayer structure also includes a sealing portion in contact with the sealing area. A device with a microporous membrane where the porosity of the membrane at the portion of the sealing area has been substantially reduced or eliminated to stop liquid transportation. ## Claims ### Claim 1 A device for diffusion of volatile substances, the device comprising: a container for containing volatile substances, the container having an aperture and a perimetric flange at the perimeter of said aperture of the container defining a sealing area; and a multilayer structure placed over said aperture and on said perimetric flange, said multilayer structure comprising: a microporous membrane positioned over said aperture, and the perimetric flange, and having a section configured to permit the volatile substances contained in the container to diffuse through the microporous membrane, the microporous membrane including a heterophasic layer over the perimetric flange that does not permit liquid transport, a removable barrier layer removably attached to the microporous membrane; and a sealing portion on the perimetric flange and made of a material that extends into the microporous membrane to seal pores in the microporous membrane to define the heterophasic layer. ### Claim 2 (depends on 1) The device for diffusion of volatile substances according to claim 1, wherein said sealing portion is made from a polymeric material. ### Claim 3 (depends on 1) The device for diffusion of volatile substances according to claim 1, wherein said sealing portion is made from thermoset resin or thermoplastic. ### Claim 4 (depends on 1) The device for diffusion of volatile substances according to claim 1, wherein said multilayer structure comprises a separation layer that is placed between the barrier layer and the membrane, and that is removed before a first use. ### Claim 5 (depends on 1) The device for diffusion of volatile substances according to claim 1, wherein said barrier layer is made from metal or plastic. ### Claim 6 (depends on 4) The device for diffusion of volatile substances according to claim 4, wherein said separation layer is made from paper or plastic. ### Claim 7 (depends on 1) The device for diffusion of volatile substances according to claim 1, wherein said sealing portion is welded to said sealing area. ### Claim 8 A device for diffusion of volatile substances, the device comprising: a container for containing volatile substances, the container having a perimeter and a perimeter flange in correspondence with the perimeter, and having an aperture and a sealing area in correspondence with the perimeter flange; and a multilayer structure placed on said aperture, said multilayer structure comprising: a microporous membrane positioned and configured such that the volatile substances contained in the container are diffused through the microporous membrane, a removable barrier layer; and a sealing portion made of a material and having a width and the sealing portion in contact with the sealing area, the width of the sealing portion corresponding with a width of the perimeter flange of the container.