# US 5,344,671 A · Process and decorative material for producing a decorative surface > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,344,671 A - Document ID: US5344671A - Status: Granted - Kind: A - Application number: 07/992,076 - Filed: 1992-12-17 - Granted: 1994-09-06 - Earliest claimed: 1991-12-21 - Inventors: Gunther Wottrich - Web page: https://patentgrep.com/patent/US5344671A ## CPC - B44C 1/04: Producing precipitations (producing precipitations by electrolysis C25D) - B05D 5/06: to obtain multicolour or other optical effects (B05D5/02 takes precedence) - B44D 5/00: Surface treatment to obtain special artistic surface effects or finishes (pretreatment or after-treatment of surface coated by applying liquids B05D3/00; obtaining special surface effects by applying liquids or other fluent materials to surfaces B05D5/00; surface shaping of plastics, e.g. embossing, B29C59/00) - B05D 2601/02: used for pigmentation effect, e.g. metallic effect - B44C: PRODUCING DECORATIVE EFFECTS (processes for applying liquids or other fluent materials to surfaces, in general B05D; shaping of plastics or substances in a plastic state B29C; printing processes to produce transfer pictures B41M3/12; thermographic duplication or marking methods B41M5/00); MOSAICS; TARSIA WORK (imitation of mosaic or tarsia work patterns B44F11/04); PAPERHANGING {(labels G09F; multi-step processes for making paper labels or tags B31D1/02)} - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - B44D: PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES (surface treatment in general, see the relevant places, e.g. applying liquids or other fluent materials B05) ## Abstract A process for refining the visual image of the surface of an object, preferably roofing materials. The invention also relates to an application to the surface of an object, preferably for executing the process. An appearance of a copper coating on arbitrary surfaces, in particular roofing made of modern materials is possible, particularly with the inclusion of the patina appearance. The application according to this invention is particularly inexpensive and simple to apply and weather-resistant, especially when used in roofing. The process of this invention is distinguished since the surface is provided with a coat of an application medium containing copper particles which have been subjected to oxidation. ## Claims ### Claim 1 A process for producing a decorative surface of a structure selected from the group consisting of a roofing member, a wall member, a facade member, a sculpture member, an obelisk member, and a column member, comprising the steps of: applying an application medium comprising copper particles to the structure and oxidizing the copper particles to form a patina. ### Claim 2 (depends on 1) A process in accordance with claim 1, wherein the copper particles are oxidized prior to applying the application medium to the decorative surface until a patina-green coloration of the copper particles is generated. ### Claim 3 (depends on 2) A process in accordance with claim 2, wherein a bonding agent is first applied to the decorative surface after which the surface, coated with the bonding agent, is dusted with the copper particles. ### Claim 4 (depends on 3) A process in accordance with claim 3, wherein the bonding agent comprises a portion of the copper particles and an extender, the bonding agent is applied to the surface of the substrate, and the surface is then dusted with a remainder of the copper particles until a supercritical pigment-volume concentration is achieved. ### Claim 5 (depends on 4) A process in accordance with claim 4, wherein the bonding agent is subsequently hardened. ### Claim 6 (depends on 5) A process in accordance with claim 5, wherein the bonding agent is heat-hardening and the bonding agent is cooled after the bonding agent is hardened. ### Claim 7 (depends on 6) A process in accordance with claim 6, wherein surplus copper particles which are not bound to the decorative surface are removed by suctioning. ### Claim 8 (depends on 1) A process in accordance with claim 1, wherein a patination substance is used for patination. ### Claim 9 (depends on 1) A process in accordance with claim 1, wherein a bonding agent is first applied to the decorative surface after which the surface, coated with the bonding agent, is dusted with the copper particles. ### Claim 10 (depends on 3) A process in accordance with claim 3, wherein the application medium, comprising a supercritical pigment-volume concentration, is applied to the decorative surface, which has an adhesion layer. ### Claim 11 (depends on 3) A process in accordance with claim 3, wherein the bonding agent is subsequently hardened. ### Claim 12 (depends on 3) A process in accordance with claim 3, wherein surplus copper particles which are not bound to the decorative surface are removed by suctioning. ### Claim 13 (depends on 2) A process in accordance with claim 2, wherein a patination substance is used for patination.