74596309
Nov 7, 1994
Dec 26, 1995
optical components, namely laser mirror blanks and optical benches
Electrical and Scientific Apparatusindustrial furnace parts, namely burner nozzles, screw plates and impellers made of silicon carbide
Environmental Control Apparatussilicon carbide material for use in the manufacture of kiln furniture, namely kiln cars
Nonmetallic Building Materials