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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C03B2201/02
Pure silica glass, e.g. pure fused quartz
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C03B2201/03
Impurity concentration specified
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C03B2201/04
Hydroxyl ion (OH)
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