# US 10,945,458 B2 · Low emissions electronic smoking device and emissions filtering device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,945,458 B2 - Document ID: US10945458B2 - Status: Granted - Kind: B2 - Application number: 16/908,532 - Filed: 2020-06-22 - Published: 2020-10-08 - Granted: 2021-03-16 - Earliest claimed: 2017-01-31 - Assignees: Philter Labs, Inc. - Applicants: Philter Labs, Inc. - Inventors: Yuval Shenkal; John Grimm - Web page: https://patentgrep.com/patent/US10945458B2 ## CPC - A24F 40/42: Cartridges or containers for inhalable precursors - A24D 3/17: Filters specially adapted for simulated smoking devices - A24F 3/00: Tobacco pipes combined with other objects (smoking appliances on walking sticks or canes A45B3/16) - A24F 7/00: Mouthpieces for pipes; Mouthpieces for cigar or cigarette holders - A24F 7/04: with smoke filters - A24F 40/48: Fluid transfer means, e.g. pumps - A24F 40/485: Valves; Apertures - B01D 46/0038: {with means for influencing the odor, e.g. deodorizing substances} - B01D 46/2414: {End caps including additional functions or special forms} - H05B 1/0297: {Heating of fluids for non specified applications} - H05B 3/44: heating conductor arranged within rods or tubes of insulating material - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) - A24D: CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES - 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) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract The present disclosure provides, in one embodiment, an electronic smoking device comprising a mouthpiece; a vaporizer portion in communication with the mouthpiece; a filter cartridge assembly in communication with the mouthpiece; an inlet check valve; and an outlet check valve. The vaporizer portion comprises a heating element for heating a smoking material housed within the vaporizer portion. The inlet check valve permits air to be inhaled from the vaporizer portion into the mouthpiece, but substantially prohibits air from being exhaled through the mouthpiece into the vaporizer portion. The outlet check valve permits air to be exhaled through the mouthpiece into the filter cartridge assembly, but substantially prohibits air from being inhaled from the filter cartridge assembly into the mouthpiece. ## Claims ### Claim 1 A filter cartridge assembly for filtering emissions, the filter cartridge assembly comprising: a mouthpiece into which emissions can be exhaled into the filter cartridge assembly; a porous filter in communication with the mouthpiece such that substantially all emissions that are exhaled into the filter cartridge assembly pass through the porous filter; and an outlet check valve that permits emissions to be exhaled into the filter cartridge assembly and substantially prohibits emissions from being inhaled out of the filter cartridge assembly. ### Claim 2 (depends on 1) The filter cartridge assembly of claim 1, wherein the porous filter comprises a mesh filter. ### Claim 3 (depends on 2) The filter cartridge assembly of claim 2, wherein the mesh filter comprises a stainless steel material. ### Claim 4 (depends on 2) The filter cartridge assembly of claim 2, wherein the mesh filter comprises a polymer material. ### Claim 5 (depends on 2) The filter cartridge assembly of claim 2 wherein the mesh filter comprises a HEPA filter. ### Claim 6 (depends on 1) The filter cartridge assembly of claim 1, wherein the outlet check valve is a one-way valve that opens when a user exhales into the filter cartridge assembly and seals when the user inhales from the filter cartridge assembly. ### Claim 7 (depends on 1) The filter cartridge assembly of claim 1 further comprising: an inlet cap secured to a first end of an outer enclosure; and a vented outlet cap secured to a second end of the outer enclosure; wherein the inlet cap, the outer enclosure, and the vented outlet cap substantially enclose the porous filter; wherein the outlet check valve permits emissions to be exhaled into the inlet cap, through the outer enclosure, and out the vented outlet cap; and wherein the outlet check valve substantially prohibits emissions from being inhaled into the vented outlet cap, through the outer enclosure, and out the inlet cap. ### Claim 8 (depends on 7) The filter cartridge assembly of claim 7, wherein the outlet check valve is positioned within the outer enclosure between the inlet cap and the vented outlet cap. ### Claim 9 (depends on 8) The electronic smoking device of claim 8, wherein the outlet check valve is secured between the outer enclosure and the vented outlet cap.