Patent classifications
C
CHEMISTRY; METALLURGY
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C02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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C02F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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1/00
Treatment of water, waste water, or sewage
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C02F1/58
by removing specified dissolved compounds
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C02F1/60
Silicon compounds
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