ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,790, issued on Dec. 30, was assigned to BASF SE (Ludwigshafen am Rhein, Germany).
"Composition for tin or tin alloy electroplating comprising leveling agent" was invented by Sabine Frischhut (Ludwigshafen, Germany), Soichi Watanabe (Ludwigshafen, Germany), Alexander Fluegel (Ludwigshafen, Germany), Marco Arnold (Ludwigshafen, Germany) and Jan Niclas Gorges (Bobenheim-Roxheim, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is an aqueous composition including tin ions, optionally alloy metal ions selected from the group consisting of silver, indium, and bismuth ions and at least one additive of formula L1aor of formula L1b"
T...