74227311
Dec 2, 1991
Nov 16, 1993
crucibles, electric arc and plasma gas chambers and torches for use in melting, treating and welding metals; electric power supplies and electrical controllers for metal melting furnaces, and parts therefor
Electrical and Scientific Apparatusfurnaces for melting and remelting metals with and without a vacuum surrounding the metal, toxic waste incinerators, vacuum arc remelting furnaces, electron beam furnaces, plasma arc furnaces, vacuum induction melting and casting furnaces, plasma cold hearth melting furnaces, plasma pyrolysis and vitrification furnaces for toxic, hazardous and low-level nuclear waste
Environmental Control Apparatus