Patent classifications
C
CHEMISTRY; METALLURGY
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C03
GLASS; MINERAL OR SLAG WOOL
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C03B
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
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5/00
Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
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C03B5/16
Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
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C03B5/2252
under reduced pressure, e.g. with vacuum refiners
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