Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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B01J
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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2220/00
Aspects relating to sorbent materials
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B01J2220/40
Aspects relating to the composition of sorbent or filter aid materials
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B01J2220/49
Materials comprising an indicator, e.g. colour indicator, pH-indicator
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