# US 2014/0151355 A1 · Heatable composite pane having a security function > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151355 A1 - Document ID: US20140151355A1 - Status: Published application - Kind: A1 - Application number: 14/122,660 - Filed: 2012-05-03 - Published: 2014-06-05 - Earliest claimed: 2011-06-10 - Assignees: Saint-Gobain Glass France - Applicants: Saint-Gobain Glass France - Inventors: Susanne Lisinski; Martin Melcher; Andreas Schlarb - Web page: https://patentgrep.com/patent/US20140151355A1 ## CPC - B60S 1/026: {using electrical means} - B32B 17/06: comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} - B32B 17/10036: {comprising two outer glass sheets} - B32B 17/10174: {Coatings of a metallic or dielectric material on a constituent layer of glass or polymer} - B32B 17/10761: {containing vinyl acetal} - B32B 17/1077: {containing polyurethane} - B32B 17/10788: {containing ethylene vinylacetate} - H05B 3/86: the heating conductors being embedded in the transparent or reflecting material {(H05B3/845 takes precedence)} - H05B 2203/013: Heaters using resistive films or coatings - H05B 2203/031: Heaters specially adapted for heating the windscreen wiper area - H05B 2214/02: Heaters specially designed for de-icing or protection against icing - Y10T 428/31645: Next to addition polymer from unsaturated monomers - B60S: SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A composite pane is described. The composite pane has a first pane, at least one intermediate layer, a second pane, a transparent, electrically conductive first coating between the intermediate layer and the first pane and/or between the intermediate layer and the second pane, a first busbar and a second busbar, and a transparent, electrically conductive second coating. ## Claims ### Claim 1 A composite pane, comprising: a first pane, at least one intermediate layer, and second pane, a transparent, electrically conductive first coating between the at least one intermediate layer and the first pane and/or between the at least one intermediate layer and the second pane, and a first busbar and a second busbar, which are connected to the transparent, electrically conductive first coating, the first busbar being connected to a ground potential and the second busbar being connected to a DC voltage of 75 V to 450 V or an AC voltage of 25 V to 450 V, wherein an area of the transparent, electrically conductive first coating and an area of a transparent, electrically conductive second coating are arranged one over another with at least 80% congruence and insulated from each other, and the transparent, electrically conductive second coating is connected via at least one third busbar to the ground potential. ### Claim 2 (depends on 1) The composite pane according to claim 1, wherein the transparent electrically conductive second coating is arranged on a side of an intermediate layer opposite the transparent, electrically conductive first coating. ### Claim 3 (depends on 1) The composite pane according to claim 1, wherein the transparent, electrically conductive second coating is arranged on an outer side of the first pane and/or an outer side of the second pane. ### Claim 4 (depends on 1) The composite pane according to claim 1, wherein the transparent, electrically conductive second coating is connected via an insulating layer to the transparent, electrically conductive first coating. ### Claim 5 (depends on 4) The composite pane according to claim 4, wherein a front of the transparent, electrically conductive first coating is connected via the insulating layer to the transparent, electrically conductive second coating and a back of the transparent, electrically conductive first coating is connected via another insulating layer to another transparent, electrically conductive second coating. ### Claim 6 (depends on 1) The composite pane according to claim 1, wherein the first pane and/or the second pane include glass, polymers, or mixtures thereof. ### Claim 7 (depends on 1) The composite pane according to claim 1, wherein the transparent, electrically conductive first coating has a sheet resistance of 1 ohm/square to 10 ohm/square, and/or the transparent, electrically conductive second coating has a sheet resistance of 0.4 ohm/square to 10 ohm/square. ### Claim 8 (depends on 1) The composite pane according to claim 1, wherein the transparent, electrically conductive first coating and/or the transparent, electrically conductive second coating include silver, indium tin oxide, fluorinated tin oxide, or aluminum-doped zinc oxide. ### Claim 9 (depends on 1) The composite pane according to claim 1, wherein the transparent, electrically conductive second coating has low emissivity, a layer system, with at least one functional layer based on at least one metal from the group, consisting of niobium, tantalum, molybdenum, and zirconium, and a dielectric layer arranged on a vehicle interior side of the at least one functional layer. ### Claim 10 (depends on 1) The composite pane according to claim 1, wherein the transparent, electrically conductive first coating has n incisions, wherein n is a whole number ≧1 such that a resistance of the transparent, electrically conductive first coating has a heating output of 300 W/m2 to 4000 W/m2 at a DC voltage of 75 V to 450 V or an AC voltage of 25 V to 450 V. ### Claim 11 (depends on 1) The composite pane according to claim 1, wherein an area of the transparent, electrically conductive first coating and an area of the transparent, electrically conductive second coating are arranged congruently one above the other or the area of the transparent, electrically conductive second coating protrudes beyond the area of the transparent, electrically conductive first coating. ### Claim 12 (depends on 1) The composite pane according to claim 1, wherein the second busbar is connected to a DC voltage of 120 V to 450 V or an AC voltage of 50 V to 450 V. ### Claim 13 (depends on 1) A method for producing the composite pane according to claim 1, comprising: laminating the first pane, the intermediate layer, the second pane, at least one transparent, electrically conductive first coating, at least one transparent, electrically conductive second coating, the first busbar, the second busbar, and the third busbar to each other, and connecting the at least one transparent, electrically conductive first coating via the first busbar, connecting the at least one transparent, electrically conductive second coating via the third busbar to a ground potential, and connecting the at least one transparent, electrically conductive first coating via a second busbar to a DC voltage of 75 V to 450 V or an AC voltage of 25 V to 450 V. ### Claim 14 (depends on 1) A method comprising: using the composite pane according to claim 1 in means of transportation for travel on land, in the air, or on water, in particular, in motor vehicles, for example, as a windshield, rear window, side window, and/or glass roof, as well as a functional individual piece and as a built-in part in furniture, devices, and buildings, in particular as an electrical heater. ### Claim 15 (depends on 1) A method comprising: using the composite pane according to claim 1 as a motor vehicle window in motor vehicles that are driven by conversion of electrical energy preferably from accumulators, rechargeable batteries, fuel cells, or internal combustion engine driven generators, in particular in electric vehicles. ### Claim 16 (depends on 6) The composite pane according to claim 6, wherein the glass is flat glass, float glass, quartz glass, borosilicate glass or soda lime glass. ### Claim 17 (depends on 6) The composite pane according to claim 6, wherein the polymers are polyethylene, polypropylene, polycarbonate, or polymethyl methacrylate. ### Claim 18 (depends on 7) The composite pane according to claim 7, wherein the transparent, electrically conductive first coating has a sheet resistance of 3 ohm/square to 5 ohm/square. ### Claim 19 (depends on 7) The composite pane according to claim 7, wherein the transparent, electrically conductive second coating has a sheet resistance of 0.4 ohm/square to 5 ohm/square. ### Claim 20 (depends on 14) The method according to claim 14, wherein the means of transportation are motor vehicles and use of the composite pane is for a windshield, a rear window, a side window, and/or a glass roof.