# US 7,955,997 B2 · Electrostatically charged filter media incorporating an active agent > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,955,997 B2 - Document ID: US7955997B2 - Status: Granted - Kind: B2 - Application number: 10/528,005 - Filed: 2003-09-08 - Published: 2006-11-09 - Granted: 2011-06-07 - Earliest claimed: 2002-09-16 - Assignees: Triosyn Corp. - Inventors: Pierre Jean Messier - Web page: https://patentgrep.com/patent/US7955997B2 ## CPC - A41D 13/1192: {with antimicrobial agent} - A61L 9/16: using physical phenomena - B01D 39/1623: {of synthetic origin} - B01D 39/18: the material being cellulose or derivatives thereof ({cork or peat B01D39/1646} ; making filter paper D21F11/14) - B01D 39/2017: {the material being filamentary or fibrous} - B01D 39/2031: {the material being particulate} - B01D 39/2072: {the material being particulate or granular} - B03C 3/28: Plant or installations without electricity supply, e.g. using electrets - B03C 3/60: Use of special materials other than liquids - D01D 5/0985: {by means of a flowing gas (e.g. melt-blowing)} - D06M 10/025: {Corona discharge or low temperature plasma} - D06M 11/155: Halides of elements of Groups 2 or 12 of the Periodic Table - D06M 11/38: Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table - D06M 11/76: with carbon oxides or carbonates (D06M11/75 takes precedence; with percarbonic acids or their salts D06M11/50; with urea D06M13/432) - D06M 11/83: with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles - D06M 13/355: having six-membered heterocyclic rings - D06M 16/00: Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic - A62B 23/025: {the filter having substantially the shape of a mask (surgical face masks A41D13/11)} - B01D 2239/0407: comprising particulate additives, e.g. adsorbents - B01D 2239/0435: Electret - B01D 2239/0442: Antimicrobial, antibacterial, antifungal additives - B01D 2239/0492: on fibres - Y10T 428/249953: Composite having voids in a component [e.g., porous, cellular, etc.] - Y10T 442/60: Nonwoven fabric [i.e., nonwoven strand or fiber material] - Y10T 442/696: Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.] - Y10T 442/699: Including particulate material other than strand or fiber material - A41D: OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES - 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) - B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B) - D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS - D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS - A62B: DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING (valves specially adapted for medical use A61M39/00; life-saving devices, apparatus or methods specially adapted for use in water B63C9/00; divers' equipment B63C11/00; specially adopted for use with aircraft, e.g. parachutes, ejector seats, {B64D17/00, B64D25/10}; rescue devices peculiar to mining E21F11/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract There is provided a protective media and a method of manufacturing the same. In one aspect, the protective media includes a porous dielectric carrier, an active agent incorporated in the porous dielectric carrier, and an electrostatic charge across at least a portion of the porous dielectric carrier. This innovative media is capable of eradicating microorganisms and/or toxins more efficiently than prior art solutions and can also self sterilize. ## Claims ### Claim 1 A protective media for filtering and killing microorganisms in air, said protective media comprising: a porous dielectric carrier; a biocidal active agent incorporated in or on said porous dielectric carrier, said active agent being an iodinated resin; and an electrostatic charge across at least a portion of said porous dielectric carrier, wherein said porous dielectric carrier is a non-woven material, and wherein said porous dielectric carrier is capable of holding an electrostatic charge in the presence of said biocidal active agent. ### Claim 2 (depends on 1) The protective media of claim 1 in which said porous dielectric carrier is a fiber based material having a fibrous matrix structure. ### Claim 3 (depends on 1) The protective media of claim 1 in which said porous dielectric carrier is a sponge like material have an open cell matrix structure, wherein the open cell matrix structure is a foam. ### Claim 4 (depends on 1) The protective media of claim 1 in which said non-woven material is a three dimensional structure configured to provide a matrix capable of physically entrapping said active agent. ### Claim 5 (depends on 4) The protective media of claim 4 in which said active agent is configured to be physically entrapped in said matrix. ### Claim 6 (depends on 1) The protective media of claim 1 in which said porous dielectric carrier comprises polymer fiber. ### Claim 7 (depends on 6) The protective media of claim 6 in which said polymer fiber comprises polypropylene. ### Claim 8 (depends on 6) The protective media of claim 6 in which said polymer fiber comprises a member selected from the group consisting of nylon, polyethylene, and polyester. ### Claim 9 (depends on 1) The protective media of claim 1 in which said porous dielectric carrier is capable of holding an electrostatic charge in the presence of said biocidal active agent for at least six months. ### Claim 10 A protective media for filtering and killing microorganisms in air, said protective media comprising: a first porous dielectric carrier; a first active agent incorporated in said first porous dielectric carrier, said first active agent being a biocidal iodinated resin; an electrostatic charge across at least a portion of said first porous dielectric carrier; a second porous dielectric carrier; a second active agent incorporated in said second porous dielectric carrier; and an electrostatic charge across at least a portion of said second porous dielectric carrier, wherein each of said first porous dielectric carrier and said second porous dielectric carrier is a non-woven material, and wherein said first porous dielectric carrier is capable of holding an electrostatic charge in the presence of said biocidal iodinated resin. ### Claim 11 (depends on 10) The protective media of claim 10 in which said first active agent and said second active agent are of the same material. ### Claim 12 (depends on 10) The protective media of claim 10 in which an air gap separates said first and said second porous dielectric carriers. ### Claim 13 (depends on 12) The protective media of claim 12 in which said porous dielectric carrier is a fiber based material having a fibrous matrix structure. ### Claim 14 (depends on 13) The protective media of claim 13 in which said non-woven material is a three dimensional structure configured to provide a matrix capable of physically entrapping said active agent. ### Claim 15 (depends on 14) The protective media of claim 14 in which said active agent consists of particles configured to be physically entrapped in said matrix. ### Claim 16 (depends on 12) The protective media of claim 12 in which said porous dielectric carrier is a sponge like material have an open cell matrix structure. ### Claim 17 (depends on 10) The protective media of claim 10 in which said first porous dielectric carrier is capable of holding an electrostatic charge in the presence of said biocidal iodinated resin for at least six months.