# US 8,540,168 B2 · Wick fragrance diffuser > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,168 B2 - Document ID: US8540168B2 - Status: Granted - Kind: B2 - Application number: 12/639,281 - Filed: 2009-12-16 - Published: 2010-06-17 - Granted: 2013-09-24 - Earliest claimed: 2008-12-17 - Applicants: Gregory Bennett; Aksornsil Kaewbudda - Inventors: Gregory Bennett; Aksornsil Kaewbudda - Web page: https://patentgrep.com/patent/US8540168B2 ## CPC - A61L 9/127: {comprising a wick} - 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) ## Abstract A fragrance diffuser and method of adjusting the evaporation rate of fragrance from a diffuser includes a container having an opening communicating with the interior of the container. A quantity of granular solids material such as silica sand, calcium carbonate sand, salt or starch is located in the container, and a fragrance material is mixed with the solids material to form a solids material-fragrance material mixture that is free of solvents, or includes a minor amount of a low volatility solvent. Wicking material is inserted through the opening of the container, and a portion of the wicking material is immersed into and supported by the solids material-fragrance material mixture. The fragrance material migrates along or through the wicking material and evaporates into the surrounding environment. The evaporation rate of fragrance from the diffuser can be adjusted by varying the length of the wicking material immersed into the granular solids material-fragrance mixture. ## Claims ### Claim 1 A fragrance diffuser comprising: a) a container having an opening communicating with an interior of the container, a quantity of solids material disposed in the interior of the container, said solids material comprising granules of a substantial minimum size; b) a fragrance material mixed with the solids material to form a solids-fragrance material mixture; c) at least one element of wicking material inserted into the container through the opening in the container, the at least one element of wicking material having a portion immersed into the combination of the fragrance material and the solids material; d) the solids-fragrance material mixture in the container contacting the wicking material, the wicking material portion that is immersed into the solids-fragrance material mixture being held in place, in any variable position of the wicking material, through the interaction between the wicking material and the granules of the solids material; e) the fragrance material migrating along said at least one element of wicking material, said fragrance material evaporating into the environment surrounding the container and creating an aroma in the environment surrounding the container. ### Claim 2 (depends on 1) The fragrance diffuser of claim 1, wherein: said liquid fragrance material is free of solvents. ### Claim 3 (depends on 1) The fragrance diffuser of claim 1, wherein: said liquid fragrance material includes a minor amount of a low volatility solvent. ### Claim 4 (depends on 1) The fragrance diffuser of claim 1, wherein said fragrance material is a liquid. ### Claim 5 (depends on 1) The fragrance diffuser of claim 1, wherein: said fragrance material is a combination of liquid-solid fragrance materials. ### Claim 6 (depends on 1) The fragrance diffuser of claim 1, wherein: said solids material is a granular solids material. ### Claim 7 (depends on 1) The fragrance diffuser of claim 1, wherein: said solids material is selected from the group consisting of amorphous solids material and crystalline solids material. ### Claim 8 (depends on 7) The fragrance diffuser of claim 7, wherein: said solids material is selected from the group consisting of silica sand, calcium carbonate sand, and starch. ### Claim 9 (depends on 7) The fragrance diffuser of claim 7, wherein: said solids material is salt. ### Claim 10 (depends on 1) The fragrance diffuser of claim 1, wherein: said solids material is pretreated with a fragrance material prior to use. ### Claim 11 (depends on 1) The fragrance diffuser of claim 1, wherein: the at least one element of wicking material is pretreated with a fragrance material prior to use. ### Claim 12 (depends on 1) The fragrance diffuser of claim 1, wherein: the amount of fragrance emitted by the diffuser is adjusted by modifying the position of the portion of the wicking material immersed into the solids fragrance material mixture. ### Claim 13 (depends on 1) The fragrance diffuser of claim 1, wherein: said wicking material is selected from the group consisting of natural reed, natural branch, cotton, synthetic polymer, and natural sponge. ### Claim 14 (depends on 1) The fragrance diffuser of claim 1, wherein: said fragrance material comprises fragrance elements selected from the group consisting of synthetic fragrance chemicals, natural chemical elements, plant resins, and essential oils. ### Claim 15 (depends on 1) The fragrance diffuser of claim 1, wherein: said wicking material is bleached. ### Claim 16 (depends on 1) The fragrance diffuser of claim 1, wherein: the solids material includes gypsum in the amount of less than 1 percent by weight. ### Claim 17 (depends on 1) The fragrance diffuser of claim 1, wherein: the ratio of solids material to fragrance material in said solids fragrance material mixture is in the range of 1:1 to 10:1. ### Claim 18 (depends on 1) The fragrance diffuser of claim 1, wherein: the ratio of solids material to fragrance material in said solids fragrance material mixture is approximately 4:1. ### Claim 19 (depends on 1) The fragrance diffuser of claim 1, wherein: the granules comprising the solids material are in the size range of 0.2 mm to 1.0 mm in diameter.