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
Possehl Erzkontor N.A.
Refractory Minerals Co., Inc.
Resco Products, Inc.
Rio Tinto Alcan Chemicals
Ribbon Technology Corporation
Sintertec
U.S. Electrofused Minerals, Inc.
Washington Mills Electro Minerals Corp.
