Process for the production of silver-tin master alloys for dental amalgams
Patent 4479823 Issued on October 30, 1984. Estimated Expiration Date: 
October 25, 2003. 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.
October 25, 2003. 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 2271264 3305356 3871876 Dental amalgam Dental alloy and amalgam Dental amalgam Dental composition Patent #: 3997329 InventorAssigneeApplicationNo. 06/545208 filed on 10/25/1983US Classes:75/337, By impinging plural liquid streams264/11, By impinging plural liquid masses264/12, By impinging or atomizing with gaseous jet or blast264/6, With subsequent uniting of the particles75/338, By impinging or atomizing with gaseous jet or blast75/356, And shaping or sintering prior to comminution75/955PRODUCING DENTAL PRODUCTExaminersPrimary: Stallard, W.Attorney, Agent or FirmInternational ClassesB22F 1/00 (20060101)C22C 1/04 (20060101) A61K 6/05 (20060101) A61K 6/02 (20060101) Foreign Application Priority Data1982-10-30 DEAbstractA silver-tin-copper master alloy powder useful as a dental filling when amalgamated with mercury and having improved properties for that utility can be obtained by the steps of:(a) pulverizing an alloy containing silver, tin and copper into a first spherical powder by high pressure water, inert gas or similar pulverization(b) drying and forming said first powder into a coherent shaped article;(c) sintering the shaped article at an elevated temperature; and(d) pulverizing the sintered shaped article by machining into a master alloy powder. | |
