Lead-free mirrors and environmentally safe manufacture thereof
October 8, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1977639 2123049 Reflecting mirror Multi-layer reflectors Primer for metal films on nonmetallic substrates Radiant energy reflector and method for construction thereof Protective overcoat of titanium nitride films Stainless steel overcoat for sputtered films Cyanamide salts of non-lead metals as corrosion inhibitive pigments in mirror back coatings Silicon nitride protective coatings for silvered glass mirrors InventorsAssigneeApplicationNo. 958593 filed on 10/08/1992US Classes:428/623, Adjacent to each other204/192.27, Reflective428/622, More than one such component428/626, Synthetic resin428/627, Boride, carbide or nitride component428/630, Noncrystalline silica or noncrystalline plural-oxide component (e.g., glass, etc.)428/632, Oxide-containing component428/687Surface feature (e.g., rough, mirror)ExaminersPrimary: Zimmerman, John J.Attorney, Agent or FirmForeign Patent References
International ClassesB32B 017/06C23C 014/08 C23C 014/18 G02B 005/08 AbstractMirrors are formed in an environmentally compatible and substantially pollution-free manner by a sputtering process in which a transparent substrate such as glass has first sputtered upon it a primer layer and then a reflective layer of silver or other bright reflective metal. A barrier layer is provided over the reflective layer to protect the latter from corrosive environments. If the transmittance of the reflective layer is greater than zero percent, the barrier layer includes a different bright reflective metal sufficient to reduce the transmittance of the combined reflective and barrier layers to zero percent. The mirror includes a lead free polymeric protective layer spaced further from the transparent substrate than the barrier layer. The inclusion of zinc pigment in the polymeric coating provides sulfiding protection, and the use of an outer sputtered on film of zinc or zinc oxide provides substantial adhesion thereto of the polymeric coating.Other References
Field of SearchSurface feature (e.g., rough, mirror)With additional, spatially distinct nonmetal component More than one such component Adjacent to each other Organic component Synthetic resin Film (e.g., glaze, etc.) Oxide-containing component Plural oxides Ag-base component Of metal Next to metal salt or oxide Boride, carbide or nitride component Noncrystalline silica or noncrystalline plural-oxide component (e.g., glass, etc.) With selective absorption or transparent overcoating Laminated or layered mirror support MIRROR With support Reflective |
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