Gold-colored coin material
Patent 4436790 Issued on March 13, 1984. Estimated Expiration Date: 
April 22, 2002. 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 22, 2002. 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 1630999 1881257 2133845 2231940 Gold colored laminated composite material having magnetic properties Composite material Patent #: 4330599 InventorsAssigneeApplicationNo. 06/370692 filed on 04/22/1982US Classes:428/675, Next to Co-, Cu-, or Ni-base component148/433, Tin containing420/471Aluminum containingExaminersPrimary: Skiff, Peter K.Attorney, Agent or FirmInternational ClassesC22C 9/01 (20060101)C22C 9/02 (20060101) Foreign Application Priority Data1981-04-23 DEAbstractA copper-base alloy which consists essentially of 1 to 7% tin and 1 to 7% aluminum and contains aluminum and tin in a total not in excess of 10%, balance copper and inevitable impurities which are due to the manufacturer, is disclosed. It is useful as a coinage material of gold color. | |
