# US 11,077,395 B2 · Portable air filter device and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,395 B2 - Document ID: US11077395B2 - Status: Granted - Kind: B2 - Application number: 16/009,438 - Filed: 2018-06-15 - Published: 2018-12-20 - Granted: 2021-08-03 - Earliest claimed: 2017-06-15 - Applicants: Gary Trenda - Inventors: Gary Trenda - Web page: https://patentgrep.com/patent/US11077395B2 ## CPC - B01D 46/0002: {Casings; Housings; Frame constructions} - H04L 12/2801: {Broadband local area networks} - B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces - B01D 46/58: connected in parallel - B01D 2265/04: Permanent measures for connecting different parts of the filter, e.g. welding, glueing or moulding - B01D 2267/30: Same type of filters - B01D 2275/202: Disc-shaped filter elements - B01D 2275/205: Rectangular shape - B01D 2279/35: for venting arrangements - 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) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A portable air filter and method of use are provided. The portable air filter includes a semi-permeable air filter, optionally disposed within a frame. An attachment surface, such as an adhesive, is disposed on the frame, for attaching the portable air filter to an air vent. In certain embodiments, a second air filter and frame are slidably connected to the frame. If the portable air filter is not disposed within a frame, the portable air filter is cut to fit over an air vent, and an adhesive, such as tape, is provided for a user to attach the cut filter to fit over the air vent. The method includes attaching the portable air filter to an air vent by pressing the adhesive to a wall, ceiling, or floor such that the portable air filter covers the air vent. The invention is useful for improving air quality in a variety of spaces, including in an airplane, in a hotel, on a cruise ship, on a travel bus, and other public spaces. ## Claims ### Claim 1 A method of filtering an air exiting a vent, comprising: contacting a vent with an attachment surface of at least one portable air filter, wherein the portable air filter comprises a frame, the attachment surface, and a planar filter, wherein the planar filter is flush with a rear side of the frame; adhering the attachment surface to the vent such that the at least one portable air filter eclipses the vent; and wherein the at least one portable air filter is configured to reduce a concentration of contaminants in the air. ### Claim 2 (depends on 1) The method of claim 1, wherein the attachment surface is secured to a first side of the at least one portable air filter, wherein the attachment surface is configured to rest flush against the surface, wherein adhering the attachment surface to the surface comprises applying a force to a second side of the at least one portable air filter. ### Claim 3 (depends on 2) The method of claim 2, wherein the attachment surface is secured to at least two portable air filters. ### Claim 4 (depends on 2) The method of claim 2, wherein an outline of the vent is shaped substantially similar to at least one selected from the group consisting of: a rectangle, a square, and a circle. ### Claim 5 (depends on 2) The method of claim 2, wherein the attachment surface is at least one selected from the group consisting of: an adhesive, a hook-and-loop, a magnet, and a combination thereof. ### Claim 6 (depends on 5) The method of claim 5, wherein the adhesive is double-faced. ### Claim 7 (depends on 2) The method of claim 2, comprising cutting the at least one portable air filter, such that the shape of the at least one portable air filter is about equal to an outline of the vent. ### Claim 8 (depends on 2) The method of claim 2, comprising removing the attachment surface from the surface after filtering the air exiting the vent. ### Claim 9 (depends on 1) The method of claim 1, wherein the planar filter rests flush against the vent when the portable air filter is secured to the vent. ### Claim 10 A method of filtering an air exiting a vent, comprising: contacting a surface surrounding a vent with an attachment surface of at least one portable air filter, wherein the portable air filter comprises a frame, the attachment surface, and a planar filter, wherein the planar filter is flush with a rear side of the frame; adhering the attachment surface to the surface surrounding the vent such that the at least one portable air filter eclipses the vent; and wherein the at least one portable air filter is configured to reduce a concentration of contaminants in the air. ### Claim 11 (depends on 10) The method of claim 10, wherein the attachment surface is secured to a first side of the at least one portable air filter, wherein the attachment surface is configured to rest flush against the surface, wherein adhering the attachment surface to the surface comprises applying a force to a second side of the at least one portable air filter. ### Claim 12 (depends on 11) The method of claim 11, wherein the attachment surface is secured to at least two portable air filters. ### Claim 13 (depends on 11) The method of claim 11, wherein an outline of the vent is shaped substantially similar to at least one selected from the group consisting of: a rectangle, a square, and a circle. ### Claim 14 (depends on 11) The method of claim 11, wherein the attachment surface is at least one selected from the group consisting of: an adhesive, a hook-and-loop, a magnet, and a combination thereof. ### Claim 15 (depends on 14) The method of claim 14, wherein the adhesive is double-faced. ### Claim 16 (depends on 11) The method of claim 11, comprising cutting the at least one portable air filter, such that the shape of the at least one portable air filter is about equal to an outline of the vent. ### Claim 17 (depends on 11) The method of claim 11, comprising removing the attachment surface from the surface after filtering the air exiting the vent. ### Claim 18 (depends on 10) The method of claim 10, wherein the planar filter rests flush against the vent when the portable air filter is secured to the surface surrounding the vent. ### Claim 19 An air filtration device comprising; a frame, at least one planar air filter disposed within a rear interior perimeter of the frame, and an attachment material disposed on an exterior surface of the frame; the attachment material configured to removably adhere the frame to a surface surrounding a ventilation outlet; the frame sized and shaped to surround and receive an entirety of the ventilation outlet, whereupon the frame being secured to the surface surrounding the ventilation outlet; wherein the planar air filter is flush against the ventilation outlet; and wherein the planar filter is flush with a rear side of the frame.