# US 11,078,108 B2 · Open-pore sintered glasses for use in electronic cigarettes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,078,108 B2 - Document ID: US11078108B2 - Status: Granted - Kind: B2 - Application number: 15/893,584 - Filed: 2018-02-10 - Published: 2018-06-14 - Granted: 2021-08-03 - Earliest claimed: 2015-08-10 - Assignees: Schott AG - Applicants: Schott AG - Inventors: Ulrich Peuchert; Norbert Greulich-Hickmann; Philipp Treis; Yvonne Menke; Michael Kluge - Web page: https://patentgrep.com/patent/US11078108B2 ## CPC - C03C 11/00: Multi-cellular glass {; Porous or hollow glass or glass particles} - A24F 40/42: Cartridges or containers for inhalable precursors - A61L 9/03: Apparatus therefor - A61M 11/042: {electrical} - A61M 15/06: Inhaling appliances shaped like cigars, cigarettes or pipes - C03B 19/06: by sintering, {e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction} - C03C 3/087: containing calcium oxide, e.g. common sheet or container glass - C03C 3/091: containing aluminium - A24F 40/10: Devices using liquid inhalable precursors - A61L 2209/135: Vaporisers for active components - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) - 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) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES ## Abstract A sintered body for use as a liquid reservoir in an electronic cigarette, medication administering devices, in thermally heated evaporators for fragrant substances is provided. The sintered body is made of open-pore sintered glass and has a porosity of greater than 50 vol %. The average pore size is in a range from 1 to 450 μm. The glass of the sintered body has a transition temperature Tg of at least 450° C. ## Claims ### Claim 1 A sintered body for use as a liquid reservoir, comprising an open-pore sintered glass having a porosity of >50 vol % and an average pore size in a range from 90 to 450 μm, wherein the open-pore sintered glass comprises glass having a transition temperature of at least 450° C., wherein the open-pore sintered glass has a specific surface area that is at least 0.8 m2/g and smaller than 20 m2/g. ### Claim 2 (depends on 1) The sintered body as claimed in claim 1, wherein the open-pore sintered glass is configured for a use selected from the group consisting of an electronic cigarette, a medication administering device, and a thermally heated evaporator for a fragrant substance. ### Claim 3 (depends on 1) The sintered body as claimed in claim 1, wherein the open-pore sintered glass has a mass and adsorbs propylene glycol in an amount of at least 50% of the mass at a temperature of 20° C. and in an adsorption time of 3 hours. ### Claim 4 (depends on 3) The sintered body as claimed in claim 3, wherein the open-pore sintered glass is configured so that not more than 15 wt % of previously adsorbed propylene glycol is desorbed during a desorption time of 100 hours, and wherein the open-pore sintered glass desorbs at least 50% of the previously adsorbed propylene glycol at a temperature of 300° C. and a desorption time of 5 minutes. ### Claim 5 (depends on 1) The sintered body as claimed in claim 1, wherein the transition temperature is greater than 600° C. ### Claim 6 (depends on 1) The sintered body as claimed in claim 1, wherein the glass has a coefficient of linear thermal expansion a in a range from 2.5 ppm/K to 10.5 ppm/K. ### Claim 7 (depends on 1) The sintered body as claimed in claim 1, wherein the average pore size is in a range from 90 μm to 350 μm. ### Claim 8 (depends on 1) The sintered body as claimed in claim 1, wherein the porosity is at greater than 80 vol %. ### Claim 9 (depends on 1) The sintered body as claimed in claim 1, wherein the glass is selected from the group consisting of a borosilicate glass, an aluminosilicate glass, an aluminoborosilicate glass, and a soda-lime glass. ### Claim 10 (depends on 1) The sintered body as claimed in claim 1, wherein the glass comprises (in wt % on an oxide basis): SiO2 70 to 75 wt %; Na2O + K2O 12 to 16 wt %; CaO 8 to 11 wt %; MgO 0 to 5 wt %; and Al2O3 0 to 2 wt %. ### Claim 11 (depends on 1) The sintered body as claimed claim 1, wherein the glass comprises (in wt % on an oxide basis): SiO2 70 to 85 wt %; B2O3 5 to 15 wt %; Alkali oxides 3 to 7 wt %; Alkaline earth oxides 0 to 4 wt %; and Al2O3 2 to 5 wt %. ### Claim 12 (depends on 1) The sintered body as claimed in claim 1, wherein the glass comprises (in wt % on an oxide basis): SiO2 50 to 75 wt %; Na2O 0 to 15 wt %; K2O 2 to 14 wt %; Al2O3 0 to 15 wt %; MgO 0 to 4 wt %; CaO 3 to 12 wt %; BaO 0 to 15 wt %; ZnO 0 to 5 wt %; and TiO2 0 to 2 wt %. ### Claim 13 (depends on 1) The sintered body as claimed in claim 1, wherein the glass comprises (in wt % on an oxide basis): SiO2 30 to 85 wt %; B2O3 0.5 to 20 wt %; Al2O3 0 to 15 wt %; Na2O 3 to 15 wt %; K2O 2.5 to 15 wt %; ZnO 0 to 12 wt %; MgO 2 to 10 wt %; BaO 0 to 10 wt %; TiO2 0 to 10 wt %; and CaO 0 to 8 wt %. ### Claim 14 (depends on 1) The sintered body as claimed in claim 1, wherein the specific surface area is smaller than 10 m2/g. ### Claim 15 (depends on 1) The sintered body as claimed in claim 1, wherein the open-pore sintered glass is configured for a use selected from the group consisting of an electronic cigarette and a thermally heated evaporator for a fragrant substance. ### Claim 16 A sintered body for use as a liquid reservoir, comprising an open-pore sintered glass having a porosity of >50 vol % and an average pore size in a range from 1 to 450 μm, wherein the open-pore sintered glass comprises glass having a transition temperature of at least 450° C., wherein the glass comprises (in wt % on an oxide basis): SiO2 50 to 60 wt %; B2O3 8 to 12 wt %; Al2O3 8 to 12 wt %; and BaO 20 to 30 wt %. ### Claim 17 (depends on 1) The sintered body as claimed in claim 1, wherein the glass comprises (in wt % on an oxide basis): SiO2 75 to 85 wt %; B2O3 8 to 18 wt %; Al2O3 0.5 to 4.5 wt %; Na2O 1.5 to 5.5 wt %; and K2O 0 to 2 wt %. ### Claim 18 A sintered body for use as a liquid reservoir, comprising an open-pore sintered glass having a porosity of >50 vol % and an average pore size in a range from 1 to 450 μm, wherein the open-pore sintered glass comprises glass having a transition temperature of at least 450° C., wherein the glass comprises (in wt % on an oxide basis): SiO2 58 to 65 wt %; B2O3 6 to 10.5 wt %; Al2O3 14 to 25 wt %; MgO 0 to 5 wt %; CaO 0 to 9 wt %; BaO 0 to 8 wt %; SrO 0 to 8 wt %; ZnO 0 to 2 wt %; and a total of MgO, CaO, and BaO is 8 to 18 wt %.