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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2219/00
Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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B01J2219/00018
Construction aspects
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B01J2219/00024
Revamping, retrofitting or modernisation of existing plants
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