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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5/00
Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
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C02F5/02
Softening water by precipitation of the hardness
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C02F5/06
using calcium compounds
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