ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,744, issued on Feb. 24, was assigned to METALLO BELGIUM (Beerse, Belgium).

"Process for the production of crude solder" was invented by Valentin Casado (Berango, Spain), Luis Martinez (Berango, Spain), Bert Coletti (Achel, Belgium), Jan Dirk A. Goris (Beerse, Belgium), Yves De Visscher (Wechelderzande, Belgium) and Charles Geenen (Overpelt, Belgium).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a pyrometallurgical process for producing a crude solder comprising at least 9.5-69% wt of tin and at least 25% wt lead, at least 80% tin and lead together, 0.08-12% wt of copper, 0.15-7% wt of antimony, 0.012-1.5% wt of bismuth, 0.010-1.1% wt of...