# US 10,500,882 B2 · Laser-marked polymer workpiece > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,882 B2 - Document ID: US10500882B2 - Status: Granted - Kind: B2 - Application number: 15/789,930 - Filed: 2017-10-20 - Published: 2018-02-08 - Granted: 2019-12-10 - Earliest claimed: 2011-11-17 - Assignees: Saint-Gobain Glass France - Applicants: Saint-Gobain Glass France - Inventors: Oliver Spindler - Web page: https://patentgrep.com/patent/US10500882B2 ## CPC - B41M 5/267: {Marking of plastic artifacts, e.g. with laser} - B29C 45/14: incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles {(B29C45/1671 takes precedence)} - B60J 1/00: Windows; Windscreens; Accessories therefor (B60J10/00 takes precedence; air curtains instead of windows B60J9/04 {; sealing strips for windshields B60J10/70; sealing sash guides for sliding window panes B60J10/74; glass partitions inside vehicles to protect occupants against personal attack B60R21/12}) - Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] - Y10T 428/24868: Translucent outer layer - Y10T 428/24901: including coloring matter - B41M: PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING, (correction of typographical errors B41J; processes for applying transfer pictures or the like B44C1/16; fluid media for correction of typographical errors by coating C09D10/00; printing textiles D06P) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A laser-marked polymer workpiece is described. The workpiece has a transparent component and an opaque component applied to at least one region of the transparent component. A mark is introduced onto a surface of the opaque component facing the transparent component with at least one laser. The mark is introduced, via a laser, through the transparent component. The mark is a lightening of the surface of the opaque component on which the mark was introduced. ## Claims ### Claim 1 A laser-marked polymer workpiece, comprising: a transparent component having a transmission in visible spectral range equal to or greater than 50%; an opaque component having a transmission in the visible spectral range equal to or less than 20%, the opaque component containing at least one colorant and being applied to at least one region of the transparent component, the opaque component comprising a surface facing the transparent component; and a laser mark on the surface of the opaque component, the laser mark being a brightening of the opaque component, wherein the opaque component is devoid of a laser sensitive additive, and wherein the at least one colorant comprises at least one black pigment. ### Claim 2 (depends on 1) The workpiece according to claim 1, wherein a thickness of the transparent component is from 1 mm to 20 mm. ### Claim 3 (depends on 1) The workpiece according to claim 1, wherein a thickness of the opaque component is from 0.5 mm to 10 mm. ### Claim 4 (depends on 1) The workpiece according to claim 1, wherein the workpiece comprises one or more of polycarbonate, polyethylene terephthalate, or polymethyl methacrylate. ### Claim 5 (depends on 1) The workpiece according to claim 1, wherein the black pigment comprises one or more of carbon black, aniline black, bone black, iron oxide black, spinel black, or graphite. ### Claim 6 (depends on 1) The workpiece according to claim 1, wherein the opaque component is arranged on the transparent component circumferentially in an edge region of the polymer workpiece having a width from 1 cm to 10 cm. ### Claim 7 (depends on 1) The workpiece according to claim 1, wherein the laser mark comprises at least a letter, a number, a geometric figure, a symbol, and/or a pictogram. ### Claim 8 (depends on 1) The workpiece according to claim 1, wherein the laser mark appears as at least one uniformly bright region on the opaque component. ### Claim 9 (depends on 1) The workpiece according to claim 1, further comprising a protective coating, wherein the protective coating comprises one or more of a polysiloxane, a polyacrylate, a polymethacrylate, or a polyurethane. ### Claim 10 (depends on 9) The workpiece according to claim 9, wherein the protective coating has a thickness from 1 μm to 50 μm. ### Claim 11 (depends on 10) The workpiece according to claim 10, wherein the protective coating has a thickness from 2 μm to 25 μm. ### Claim 12 (depends on 1) The workpiece according to claim 1, wherein a thickness of the transparent component is from 3 mm to 10 mm. ### Claim 13 (depends on 1) The workpiece according to claim 1, wherein a thickness of the opaque component is from 1 mm to 7 mm. ### Claim 14 A method, comprising: using a laser-marked polymer workpiece as a pane or as a part of a pane of means of transportation for travel on land, in the air, or on water, in particular as a windshield, rear window, side window, and/or roof pane of motor vehicles, wherein the laser-marked polymer workpiece includes a transparent component having a transmission in visible spectral range equal to or greater than 50%, an opaque component having a transmission in the visible spectral range equal to or less than 20%, the opaque component containing at least one colorant and being applied to at least one region of the transparent component the opaque component comprising a surface facing the transparent component; and a laser mark on the surface of the opaque component, the mark being a brightening of the opaque component, wherein the opaque component is devoid of a laser sensitive additive, and wherein the at least one colorant comprises at least one black pigment.