IC 020. US 002 013 022 025 032 050. G & S: non-metal, vitreous silica crucibles for melting a polycrystalline silicon material and forming silicon single crystal; non-metal, vitreous silica crucibles for melting a polycrystalline silicon material and forming polycrystalline silicon; all of the foregoing are non-laboratory equipment and non-furnace parts or apparatus
IC 021. US 002 013 023 029 030 033 040 050. G & S: vitreous silica as a semi-finished product, namely, ingots, tubes, discs, plates, powder, beads, flakes and rings, all for general industrial and further manufacturing use in the electronic industry and the semiconductor industry
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