Alcan Chemicals
Almatis
AluChem, Inc.
Calucem
C-E Minerals, Inc.
Christy Minerals
Company
Cometals
Electro Abrasives Corp.
Fibercon International Inc.
Great Lakes Minerals
Kerneos, Inc.
Kyanite Mining Corporation
Maryland Refractories Company
Possehl Erzkontor N.A.
Refractory Minerals Co., Inc.
Resco Products, Inc.
Ribbon Technology Corporation
Sintertec
Steel Valley Firebrick
Treibacher Schleifmittel North America, Inc.
U.S. Electrofused Minerals, Inc.
Washington Mills Electro Minerals Corp.