Nickel-free white copper alloy
Patent 6340446 Issued on January 22, 2002. Estimated Expiration Date: 
April 14, 2020. 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.
April 14, 2020. 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.InventorsAssigneeApplicationNo. 549541 filed on 04/14/2000US Classes:420/480, Manganese containing148/434, Zinc containing148/436, Aluminum containing420/482, Manganese containing420/489Aluminum, gallium, indium, or thallium containingExaminersPrimary: Yee, DeborahAttorney, Agent or FirmForeign Patent References
International ClassC22C 009/05Foreign Application Priority Data1999-04-16 JPAbstractA nickel-free white copper alloy represented by the general formula: Cua Znb Mnc Ald or Cua Znb Mnc Ald Xe, wherein X is at least one element selected from the group consisting of Si, Ti and Cr; b, c, d and e are 0.5ࣘb<5, 7ࣘcࣘ17, 0.5ࣘdࣘ4 and 0<eࣘ0.3 in terms of % by weight; a is the balance, the alloy incidentally including unavoidable elements. The alloy is free from allergic problems, which may be caused by nickel, and has excellent strength, hardness, ductility, workability and corrosion resistance, suitable for use in elements, sliders, stoppers or the like for slide fasteners, or accessories such as metallic buttons, fasteners or the like for clothes. | |
