(under subclass 430) Stock material which contains over 50 percent of silver by weight and additionally contains metal oxides formed in the silver containing the material by
chemical reaction.
(1) Note. The oxide may be formed, e.g., by reaction of a metal oxide with another to produce a different metal oxide, e.g., AgO + Cd ---CdO + Ag, or by reaction of silver base alloy with elemental oxygen to oxidize part of the alloy, etc.
