CPC Subgroup Additional Only
B01D 2239/0471 Surface coating material
Full Title
Aspects relating to filtering material for liquid or gaseous fluids > Additives and treatments of the filtering material > Surface coating material
3 direct subcodes
Child Classifications
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- B01D 2239/0478 on a layer of the filter
- B01D 2239/0485 on particles
- B01D 2239/0492 on fibres