John C. Constantine, 68, of St. Charles, Mo., died Jan. 9, 2007, at his home. He was cofounder and co-owner of Gateway Alloys.

After serving in the U.S. Army’s antiballistic missile technology program, Constantine earned a bachelor’s degree in 1965 from Alfred University, where he also did graduate work. Subsequently, he was a researcher at Engelhard Corp., where he worked on ceramic capacitors and silicon chip production, and was granted several patents for capacitor powders and inks.

He is survived by two stepchildren, four brothers, and his former wives, Audrey (Henning) and Donna (Wyatt). Constantine was a member of the ACerS Electronics Division.