Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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B01D
SEPARATION
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2275/00
Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
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B01D2275/30
Porosity of filtering material
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B01D2275/302
Means for changing the porosity of a filter element, e.g. adjustment of a slit width, compression of a foam material
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