CPC Subgroup
B01D 39/16 of organic material, e.g. synthetic fibres
Full Title
Filtering material for liquid or gaseous fluids > Other self-supporting filtering material > of organic material, e.g. synthetic fibres
5 direct subcodes
Child Classifications
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- B01D 39/18 the material being cellulose or derivatives thereof ( ; making filter paper D21F11/14)