ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,556, issued on May 13, was assigned to DOWA METALTECH Co. LTD. (Tokyo).
"Silver-plated product and method for producing same" was invented by Yutaro Hirai (Tokyo), Kentaro Arai (Tokyo) and Yosuke Sato (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A silver-plated product having a higher hardness and more excellent wear resistance than those of conventional silver-plated products, and a method for producing the same. In a method for producing a silver-plated product by forming a surface layer of silver on a base material by electroplating at a current density in a silver-plating solution which is an aqueous solution containing silver potassium...