On October 25, 1949, Keith Dwight Millis, Albert Paul Gagnebin and Norman Boden Pilling received US patent 2,485,760 on a Cast Ferrous Alloy for ductile iron production via magnesium treatment.
Pada tanggal 25 oktober 1949, Keith Dwight Millis, Albert Paul Gagnebin dan Norman Boden Pilling menerima US patent 2,485,760 pada Cor Paduan Besi untuk produksi besi ulet melalui perlakuan magnesium.