# US 2014/0154133 A1 · Purified hydrogen peroxide gas microbial control methods and devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154133 A1 - Document ID: US20140154133A1 - Status: Published application - Kind: A1 - Application number: 14/175,551 - Filed: 2014-02-07 - Published: 2014-06-05 - Earliest claimed: 2007-08-07 - Assignees: Lee Antimicrobial Solutions LLC - Applicants: Lee Antimicrobial Solutions LLC - Inventors: James D. LEE - Web page: https://patentgrep.com/patent/US20140154133A1 ## CPC - A61L 2/26: Accessories - A61L 2/208: Hydrogen peroxide - A61L 9/122: {comprising a fan} - A61L 9/205: {using a photocatalyst or photosensitiser} - B01J 7/02: by wet methods - B01J 19/123: {Ultraviolet light} - A61L 2202/11: Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps - A61L 2209/211: Use of hydrogen peroxide, liquid and vaporous - B01J 2219/00166: controlling the residence time inside the reactor vessel - B01J 2219/0886: Gas-solid - B01J 2219/1203: Incoherent waves - 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) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS ## Abstract The present invention relates to methods and devices for providing microbial control and/or disinfection/remediation of an environment. The methods generally comprise: generating a Purified Hydrogen Peroxide Gas (PHPG) that is substantially free of, e.g., hydration, ozone, plasma species, and/or organic species; and directing the gas comprising primarily PHPG into the environment such that the PHPG acts to provide microbial control and/or disinfection/remediation in the environment, preferably both on surfaces and in the air. ## Claims ### Claim 1 A method for microbial control and/or disinfection/remediation of an environment, the method comprising: (a) generating a gas comprising Purified Hydrogen Peroxide Gas (PHPG) that is substantially free of hydration, ozone, plasma species, and/or organic species; (b) directing the PHPG into the environment such that the hydrogen peroxide gas acts to provide microbial control and/or disinfection/remediation in the environment, both on surfaces and in the air. ### Claim 2 (depends on 1) The method of claim 1, wherein the generated PHPG is electrostatically attracted to positively and negatively charged structures and/or sites on microbes thereby raising its efficacy in microbial control and/or disinfection/remediation as compared to either hydrated hydrogen peroxide or ozone. ### Claim 3 (depends on 1) The method of claim 1, wherein the PHPG produced is between 0.005 ppm and 0.10 ppm in concentration. ### Claim 4 (depends on 1) The method of claim 1, wherein said microbial control and/or disinfection/remediation of an environment includes indoor air treatment, water purifier, mold eliminator, bacteria eliminator, and virus eliminator. ### Claim 5 (depends on 1) The method of claim 1, wherein the percent humidity of the air is within the range of 5-99%, or regulated therein. ### Claim 6 A method for microbial control and/or disinfection/remediation of an environment, the method comprising: (a) exposing a metal, or metal oxide, catalyst to ultraviolet light in the presence of humid purified ambient air under conditions so as to form Purified Hydrogen Peroxide Gas (PHPG) that is substantially free of hydration, ozone, plasma species, and organic species; (b) directing the PHPG into the environment such that the hydrogen peroxide gas acts to provide infection control and/or disinfection/remediation in the environment, both on surfaces and in the air. ### Claim 7 (depends on 6) The method of claim 6, wherein said microbial control and/or disinfection/remediation of an environment includes indoor air treatment, water purifier, mold eliminator, bacteria eliminator, and virus eliminator. ### Claim 8 (depends on 6) The method of claim 6, wherein the percent humidity of the air is within the range of 5-99%, or regulated therein. ### Claim 9 (depends on 6) The method of claim 6, wherein said metal or metal oxide catalyst is titanium dioxide. ### Claim 10 (depends on 6) The method of claim 6, wherein said PHPG production also results in the removal of both ozone and VOC's from the ambient air by means of direct chemical reaction of these species with PHPG, said removal comprising (a) reacting with ozone to produce oxygen and water, and (b) reacting with VOC's to produce carbon dioxide and water. ### Claim 11 A diffuser apparatus for producing PHPG comprising: (a) a source of ultraviolet light; (b) a metal or metal oxide, catalyst substrate structure; and (d) an air distribution mechanism. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the morphology of the catalyst on its substrate is a thin, sail-like air-permeable structure, situated perpendicular to air flow through the diffuser apparatus; and wherein said morphology alters the reaction equilibrium of the catalyst such that it produces hydrogen peroxide from both the oxidation of water and from the reduction of dioxygen; and said morphology substantially prevents the reduction of hydrogen peroxide on the catalyst by causing the hydrogen peroxide to rapidly flow off of and away from the catalyst before it can be reduced. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein said air distribution mechanism is a fan. ### Claim 14 (depends on 11) The apparatus of claim 11, wherein said ultraviolet light source produces at least one range of wavelength. ### Claim 15 (depends on 11) The apparatus of claim 11, wherein said ultraviolet light produces more than one range of wavelength.