# US 11,306,010 B1 · Water purification material and method for use in sanitizing pools and spas where the water purification material is free of antimicrobial materials > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,010 B1 - Document ID: US11306010B1 - Status: Granted - Kind: B1 - Application number: 16/873,721 - Filed: 2020-06-12 - Granted: 2022-04-19 - Earliest claimed: 2019-06-17 - Assignees: King Technology, Inc. - Applicants: King Technology Inc. - Inventors: David Guy; Joseph A King; Randy Roseth; Brett Libby - Web page: https://patentgrep.com/patent/US11306010B1 ## CPC - C02F 1/50: by addition or application of a germicide or by oligodynamic treatment {(C02F1/4606, C02F1/467, C02F1/76 take precedence)} - A01N 59/00: Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds - A01P 1/00: Disinfectants; Antimicrobial compounds or mixtures thereof - C02F 1/722: {Oxidation by peroxides} - C02F 1/76: with halogens or compounds of halogens {(C02F1/4674 takes precedence)} - C02F 1/683: {by addition of complex-forming compounds} - C02F 2103/42: from bathing facilities, e.g. swimming pools - C02F 2303/04: Disinfection - C02F 2305/14: Additives which dissolves or releases substances when predefined environmental conditions are reached, e.g. pH or temperature - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS - A01P: BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS ## Abstract A method and device for maintaining a body of water in a sanitized condition wherein the body of water is free from a source of bicidal metal ions and free from bromide or bromine compounds that can sanitize the body of water, the method including that steps of maintaining a chlorine level in the body of water at a level of between 1 ppm and 1.0 ppm; introducing a non-chlorine based oxidizing agent into the body of water wherein the chlorine level in combination with the oxidizing agent is selected so as to be insufficient to sanitize the body of water, and introducing a compound having a hydantoin ring therein into the body of water whereby the combination of the chlorine and the oxidizing agent sanitize the body of water without the presence of a source of biocidal metal ions to supplement the chlorine. ## Claims ### Claim 1 A method for maintaining a body of water in a sanitized condition where the body of water is free from a source of biocidal metal ions and free from bromide or bromine compounds that can sanitize the body of water comprising: maintaining a free chlorine level in the body of water at a level of between 1 ppm and 0.5 ppm; introducing a non-chlorine based oxidizing agent into the body of water wherein the chlorine level in combination with the oxidizing agent is selected so as to be insufficient to sanitize the body of water; and introducing a compound having a hydantoin ring therein into the body of water whereby the combination of the chlorine and the oxidizing agent sanitize the body of water without the presence of a source of biocidal metal ions to supplement the chlorine. ### Claim 2 (depends on 1) The method of claim 1 wherein the compound having a hydantoin ring comprises DCDMH. ### Claim 3 (depends on 1) The method of claim 1 wherein the compound having a hydantoin ring comprises DCMEH. ### Claim 4 (depends on 1) The method of claim 1 wherein the non-chlorine based oxidizing agent is selected from the group consisting of: dipersulfates, monopersulfates, peroxides, percarbonates or permanganates. ### Claim 5 (depends on 1) The method of claim 1 wherein adding the compound having the hydantoin ring comprises adding the compound in either tablet, pellet or granular form or combinations thereof. ### Claim 6 (depends on 1) The method of claim 1 wherein the compound having a hydantoin ring consists of DCDMH. ### Claim 7 (depends on 1) The method of claim 1 wherein the compound having a hydantoin ring consists of DCMEH. ### Claim 8 A method for maintaining a body of recreation water in a sanitized condition where the body of water is free from a source of metal ions and free from bromide or bromine compounds that can sanitize the body of water comprising: maintaining a concentration of free available chlorine in the body of recreation water that is insufficient to sanitize the body of recreational water for human partial immersion in the body of recreation water; adding a compound having a hydantoin ring therein into the body of recreation water; and adding a non-chlorine based oxidizing agent into the body of recreation water that when used alone in the body of recreational water is insufficient to sanitize the body of recreational water, the oxidizing agent interacting with the chlorine in the body of recreational water to increase the antimicrobial of the chlorine while also interacting with the compound having the hydantoin ring. ### Claim 9 (depends on 8) The method of claim 8 wherein the free available chorine concentration in the body of recreational water is maintained between 0.5 ppm and 1.0 ppm. ### Claim 10 (depends on 8) The method of claim 8 wherein the step of adding a compound having the hydantoin ring therein into the body of recreation water comprises adding DCDMH or DCMEH into the body of recreation water. ### Claim 11 (depends on 8) The method of claim 8 wherein the body of recreation water comprises a pool, spa or hot tub. ### Claim 12 (depends on 8) The method of claim 8 wherein the compound having the hydantoin ring is in granular form. ### Claim 13 (depends on 8) The method of claim 8 wherein the compound having the hydantoin ring is in the form of a slow dissolving puck or tablets. ### Claim 14 (depends on 8) The method of claim 8 wherein the non-chlorine based oxidizing agent is in granular form. ### Claim 15 (depends on 8) The method of claim 8 wherein the non-chlorine based oxidizing agent is in the form of a slow dissolving puck or tablets. ### Claim 16 (depends on 8) The method of claim 8 wherein the compound having the hydantoin ring and the non-chlorine based oxidizing agent are combined in the form of a one-piece slow dissolving puck or tablet. ### Claim 17 (depends on 8) The method of claim 8 wherein the non-chlorine based oxidizing agent consist of dipersulfates, monopersulfates, peroxides, percarbonates, permanganates potassium peroxymonosulfate, potassium monopersulfate, or their combinations. ### Claim 18 A dispenser for killing microorganisms in a body of recreation water free from a source of metal ions and free from bromide or bromine compounds and having a concentration of free available chlorine in the body of recreational water that is insufficient to sanitize the body of recreational water for human partial immersion in the body of recreation water comprising: a first housing having a compound having a hydantoin ring placeable into the body of recreation water; and a second housing having a water accessible compartment containing a non-chlorine based oxidizing agent that when used alone in the body of recreational water is insufficient to sanitize the body of recreational water, the oxidizing agent interacting with the chlorine in the body of recreational water to increase the antimicrobial of the chlorine while also interacting with the compound having the hydantoin ring to convert the compound having a hydantoin ring to an antimicrobial active N-Halamine to sanitize the body of water safe for human partial immersion in the body of recreation water without the presence of a source of metal ions to supplement the chlorine. ### Claim 19 (depends on 18) The dispenser of claim 18 wherein compound having a hydantoin ring comprises DCDMH or DCMEH and the non-chlorine based oxidizing agent consist of dipersulfates, monopersulfates, peroxides, percarbonates, permanganates potassium peroxymonosulfate, potassium monopersulfate, or their combinations.