# US 10,307,702 B2 · Filters with odor-controlling compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,702 B2 - Document ID: US10307702B2 - Status: Granted - Kind: B2 - Application number: 15/674,900 - Filed: 2017-08-11 - Published: 2017-11-30 - Granted: 2019-06-04 - Earliest claimed: 2010-05-14 - Assignees: Rem Brands, Inc. - Applicants: Rem Brands, Inc. - Inventors: David J. Schneider - Web page: https://patentgrep.com/patent/US10307702B2 ## CPC - B01D 39/14: Other self-supporting filtering material {; Other filtering material (non-woven fabrics in general D04H3/00)} - A61K 8/466: {containing sulfonic acid derivatives; Salts} - A61L 9/01: Deodorant compositions {(compositions released by contact with a liquid A61L9/05)} - A61L 9/16: using physical phenomena - A61L 15/46: Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria - A61Q 19/00: Preparations for care of the skin - B01D 46/0038: {with means for influencing the odor, e.g. deodorizing substances} - B01D 46/121: V-type arrangements - B01D 46/521: {using folded, pleated material} - B01D 46/525: {which comprises flutes} - B01J 20/22: comprising organic material - B01J 20/28035: {with more than one layer, e.g. laminates, separated sheets} - B01J 20/3204: {Inorganic carriers, supports or substrates} - B01J 20/321: {consisting of a polymer obtained by reactions involving only carbon to carbon unsaturated bonds} - B01J 20/3212: {consisting of a polymer obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds} - B01J 20/3253: {comprising a cyclic structure not containing any of the heteroatoms nitrogen, oxygen or sulfur, e.g. aromatic structures} - A61K 2800/10: General cosmetic use - A61L 2209/14: Filtering means - A61Q 5/02: Preparations for cleaning the hair - A61Q 5/06: Preparations for styling the hair, e.g. by temporary shaping or colouring - A61Q 17/04: Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations - B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces - B01D 2239/045: Deodorising additives - B01D 2279/50: for air conditioning - C02F 1/001: {Processes for the treatment of water whereby the filtration technique is of importance (C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00)} - C02F 1/285: {using synthetic organic sorbents} - C02F 2303/02: Odour removal or prevention of malodour - 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) - A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D) - 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) - A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - 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) ## Abstract A filter is treated with a reduced amount of a halo active aromatic sulfanomide compound of Formula (I): wherein R1, R2, R3, R4, and R5 are independently selected from hydrogen, COOR′, CON(R″)2, alkoxy, CN, NO2, SO3R″, halogen, substituted or unsubstituted phenyl, sulfonamide, halosulfonamide, and substituted or unsubstituted C1-C12 alkyl; R′ is hydrogen, an alkali metal, an alkaline earth metal, substituted C1-C12 alkyl, or unsubstituted C1-C12 alkyl; and R″ is hydrogen or substituted or unsubstituted C1-C12 alkyl, where the two R″ groups in CON(R″)2 may be independently selected; X is halogen; M is an alkali or alkaline earth metal; and n is the number of water molecules per molecule of the sulfonamide compound. The compound effectively suppresses odors pre-use, in use, and post-use for extended periods of time. ## Claims ### Claim 1 A filter, comprising: a porous substrate made from one or more layers of a filter medium that contain a halo active aromatic sulfonamide compound of Formula (I): wherein R1, R2, R3, R4, and R5 are independently selected from hydrogen, COOR′, CON(R″)2, alkoxy, CN, NO2, SO3R″, halogen, substituted or unsubstituted phenyl, sulfonamide, halosulfonamide, and substituted or unsubstituted C1-C12 alkyl; R′ is hydrogen, an alkali metal, an alkaline earth metal, substituted C1-C12 alkyl, or unsubstituted C1-C12 alkyl; and R″ is hydrogen or substituted or unsubstituted C1-C12 alkyl, where the two R″ groups in CON(R″)2 may be independently selected; X is halogen; M is an alkali or alkaline earth metal; and n is the number of water molecules per molecule of the sulfonamide compound; and a first support structure on one side of the porous substrate and a second support structure on an opposite side of the porous substrate, wherein the halo active aromatic sulfonamide compound of Formula (I) is also dispersed on the first support structure and the second support structure. ### Claim 2 (depends on 1) The filter of claim 1, wherein the halo active aromatic sulfonamide compound is present in the amount of about 0.0001 to about 10.0 grams per gram of the substrate. ### Claim 3 (depends on 1) The filter of claim 1, wherein the filter medium is made from a natural material, an inorganic material, a synthetic material, or a mixture thereof. ### Claim 4 (depends on 3) The filter of claim 3, wherein the filter medium is woven or nonwoven. ### Claim 5 (depends on 1) The filter of claim 1, wherein the filter medium is formed from regenerated fibers of a cellulosic material comprising wet-laid media, acetate, triacetate, rayon, or lyocell. ### Claim 6 (depends on 1) The filter of claim 1, wherein the filter medium fiber is a polymeric material comprising polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), fluoropolymer, polytetrafluoroethylene (PTFE), polyethersulfone (PES), nylon, acrylic, polyester, polyolefin, polyvinylidene difluoride (PVDF), polyphenylene sulfide (PPS), polyetherimide (PEI), polyether ether ketone (PEEK), liquid crystal polymer (LCP), aramid fiber, or polyimide fiber. ### Claim 7 (depends on 1) The filter of claim 1, wherein the filter medium is made from metal, fiberglass, glass, or stainless steel. ### Claim 8 (depends on 1) The filter of claim 1, wherein the filter medium is made from cotton, needle-felt fabric, or rubber. ### Claim 9 (depends on 1) The filter of claim 1, wherein the halo active aromatic sulfonamide compound is a solid or is encapsulated in a water-soluble medium. ### Claim 10 (depends on 9) The filter of claim 9, wherein the halo active aromatic sulfonamide compound is contained within a packet formed by the one or more layers of filter medium that make up the porous substrate. ### Claim 11 (depends on 1) The filter of claim 1, wherein the porous substrate is pleated or is flat. ### Claim 12 (depends on 1) The filter of claim 1, further comprising a frame surrounding the porous substrate. ### Claim 13 (depends on 1) The filter of claim 1, wherein the halo active aromatic sulfonamide compound is applied to the filter medium in the form of a solution and is present in the solution in an amount of from about 0.01% to 30% (w/v). ### Claim 14 A method of reducing odor from a fluid stream, comprising: passing a fluid stream containing odorific molecules through a filter; wherein the filter comprises (A) a porous substrate made from one or more layers of a filter medium that contain a halo active aromatic sulfonamide compound of Formula (I): wherein R1, R2, R3, R4, and R5 are independently selected from hydrogen, COOR′, CON(R″)2, alkoxy, CN, NO2, SO3R″, halogen, substituted or unsubstituted phenyl, sulfonamide, halosulfonamide, and substituted or unsubstituted C1-C12 alkyl; R′ is hydrogen, an alkali metal, an alkaline earth metal, substituted C1-C12 alkyl, or unsubstituted C1-C12 alkyl; and R″ is hydrogen or substituted or unsubstituted C1-C12 alkyl, where the two R″ groups in CON(R″)2 may be independently selected; X is halogen; M is an alkali or alkaline earth metal; and n is the number of water molecules per molecule of the sulfonamide compound; and (B) a first support structure on one side of the porous substrate and a second support structure on an opposite side of the porous substrate, wherein the halo active aromatic sulfonamide compound of Formula (I) is also dispersed on the first support structure and the second support structure. ### Claim 15 (depends on 14) The method of claim 14, wherein the fluid stream is a liquid fluid stream or a gas fluid stream. ### Claim 16 (depends on 14) The method of claim 14, wherein the odor is reduced during a life span of the filter. ### Claim 17 (depends on 14) The method of claim 14, wherein the odorific molecules are sulfur-containing odorific molecules or nitrogen-containing odorific molecules. ### Claim 18 (depends on 14) The method of claim 14, wherein the porous substrate captures particles having a size of about 2000 μm, or from about 70 μm to about 2000 μm, or from about 0.1 μm to about 70 μm, or from about 0.1 μm to about 1 μm, or from about 0.005 μm to about 0.1 μm, or from about 0.001 μm to about 0.005 μm, or about 0.001 μm. ### Claim 19 (depends on 14) The method of claim 14, wherein R1, R2, R4, and R5 are hydrogen, and R3 is COOM, wherein M is an alkali or alkaline earth metal. ### Claim 20 A filtration system, comprising: a fluid duct for transporting a fluid stream containing odorous molecules; and a filter disposed within the fluid duct that comprises a porous substrate made from one or more layers of a filter medium, a first support structure on one side of the porous substrate, and a second support structure on an opposite side of the porous substrate; wherein a halo active aromatic sulfonamide compound is contained on the filter medium, the first support structure, and the second support structure, the halo active aromatic sulfonamide compound having the structure of Formula (I): wherein R1, R2, R3, R4, and R5 are independently selected from hydrogen, COOR′, CON(R″)2, alkoxy, CN, NO2, SO3R″, halogen, substituted or unsubstituted phenyl, sulfonamide, halosulfonamide, and substituted or unsubstituted C1-C12 alkyl; R′ is hydrogen, an alkali metal, an alkaline earth metal, substituted C1-C12 alkyl, or unsubstituted C1-C12 alkyl; and R″ is hydrogen or substituted or unsubstituted C1-C12 alkyl, where the two R″ groups in CON(R″)2 may be independently selected; X is halogen; M is an alkali or alkaline earth metal; and n is the number of water molecules per molecule of the sulfonamide compound. ### Claim 21 (depends on 20) The filtration system of claim 20, wherein the fluid duct and the filter are located in an HVAC system, an automobile, a water filtration unit, an industrial or commercial filtration unit, a vacuum cleaner or other household cleaning device.