# US 11,910,497 B2 · Method and arrangement for de-icing a transparent window using an electric heating device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,497 B2 - Document ID: US11910497B2 - Status: Granted - Kind: B2 - Application number: 16/964,523 - Filed: 2019-01-24 - Published: 2021-02-04 - Granted: 2024-02-20 - Earliest claimed: 2018-01-26 - Assignees: Agc Glass Europe - Applicants: Agc Glass Europe - Inventors: Michel Meyers - Web page: https://patentgrep.com/patent/US11910497B2 ## CPC - H05B 3/84: Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields - B60J 1/002: {with means for clear vision, e.g. anti-frost or defog panes, rain shields (window heating in H05B3/84, H05B3/86)} - B60J 1/02: arranged at the vehicle front {, e.g. structure of the glazing, mounting of the glazing (on windscreen mounted antenna wire H01Q1/1271)} - B60R 16/005: {Electro-mechanical devices, e.g. switched (electric switches in general H01H)} - H05B 1/0202: {Switches} - H05B 1/0236: {for vehicles} - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - B60J: WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES (fastening, suspending, closing, or opening of such devices E05) - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR ## Abstract A method to retrofit a transparent window which does not comprise an electric heating device, such as a vehicle windshield, with a transparent window having an electric heating device. The method includes (i) removing from the vehicle the transparent window which does not comprise an electric heating device, (ii) installing a transparent window, provided with an electric heating device, such as a heating layer, and at least one temperature sensor, to obtain a retrofitted heating transparent window, (iii) connecting the electric heating device to a voltage supply device such that by applying a heating voltage to the transparent window, and (iv) connecting a remote control device with the at least one temperature sensor and the voltage supply device. ## Claims ### Claim 1 A method to retrofit a transparent window mounted on a vehicle, which window does not comprise an electric heating device, with a transparent window having an electric heating device, the method comprising: a. removing from the vehicle the transparent window which does not comprise an electric heating device; b. installing a transparent window, provided with an electric heating device and at least one temperature sensor, to obtain a retrofitted heating transparent window; c. connecting the electric heating device to a voltage supply device and applying a heating voltage to the transparent window; d. measuring a window temperature before an initial application of a heating voltage, and terminating the method if the window temperature exceeds a lower temperature threshold value and wherein the heating voltage and a heating period are selected such that a heating power corresponding to a resistance less than 10 ohms (Ω) per square meter (m2) of window area is generated; e. applying a heating voltage between 30 and 60 volts to the heating device to apply a heating power corresponding to a resistance less than 10 ohms (Ω) per square meter (m2) of window area; and f. connecting a remote control device with the at least one temperature sensor and the voltage supply device, wherein the electric heating device is used for de-icing and/or defogging the retrofitted transparent window. ### Claim 2 (depends on 1) The method according to claim 1, wherein the retrofitted transparent window is electrically powered by a further voltage supply device by applying a heating voltage to the transparent window. ### Claim 3 (depends on 2) The method according to claim 2, wherein the further voltage supply device is a battery provided in a vehicle interior. ### Claim 4 (depends on 2) The method according to claim 2, wherein the further voltage supply device is provided in an interior of a vehicle. ### Claim 5 (depends on 3) The method according to claim 3, wherein the further voltage supply device is provided under the vehicle and not under a vehicle hood. ### Claim 6 (depends on 3) The method according to claim 3, wherein the further voltage supply device is independent from other voltage supply devices provided to apply a power to other powered functionalities of the vehicle. ### Claim 7 (depends on 1) The method according to claim 1, wherein the window is a laminated transparent window comprising an exterior face and an interior face. ### Claim 8 (depends on 1) The method according to claim 1, wherein a window temperature is measured by the at least one temperature sensor, the at least one temperature sensor being positioned inside the transparent window or in an interior face of the transparent window (face 4). ### Claim 9 (depends on 1) The method according to claim 1, wherein the window further comprises a switch element positioned inside the transparent window or in an interior face of the transparent window (face 4) to switch on/switch off the applying of a heating voltage to the transparent window. ### Claim 10 (depends on 1) The method according to claim 1, wherein the lower temperature threshold value is less than or equal to 4° C. ### Claim 11 (depends on 1) The method according to claim 1, wherein an upper temperature threshold value is in a range from 20° C. to 90° C. ### Claim 12 (depends on 1) The method according to claim 1, wherein the de-icing and/or de-fogging of the transparent window is monitored remotely or automatically activated when the transparent window temperature is below 0° C. ### Claim 13 (depends on 1) A window arrangement, which comprises: a. a transparent window with an electric heating device which is connected to at least two electrodes provided for connection to a voltage supply device such that by applying a heating voltage, a heating current flows through the electric heating device formed between the electrodes, b. at least one temperature sensor for measuring a window temperature, and c. a control device coupled with the at least one temperature sensor and the voltage supply device, which is suitably configured to carry out the method according to claim 1. ### Claim 14 (depends on 13) A window arrangement according to claim 13, wherein the retrofitted transparent window is a windshield comprising two glass sheets provided with, as the electric heating device, a heated coated film laminated between the two glass sheets and with power supplied through at least two busbars. ### Claim 15 (depends on 14) The window arrangement according to claim 14, wherein the at least one temperature sensor for measuring a window temperature is provided on an internal face of a window edge arrangement. ### Claim 16 (depends on 1) A method according to claim 1, wherein the transparent window is a vehicle windshield. ### Claim 17 (depends on 1) A method according to claim 1, wherein the electric heating device is a heating layer.