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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
E03B 3/24

formed of loose materials, e.g. gravel

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Methods or installations for obtaining or collecting drinking water or tap water > from underground > Obtaining and confining water by means of wells > Component parts of wells > Well filters > formed of loose materials, e.g. gravel

CPC:

Methods or installations for obtaining or collecting drinking water or tap water (treatment of water C02F) > from underground > Obtaining and confining water by means of wells (applicable to a combination of water and other liquids or to other liquids only E21B43/00) > Component parts of wells > Well filters (filters in general B01D24/00 - B01D35/00) > formed of loose materials, e.g. gravel

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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  • E03B 3/26 with packed filtering material IPC+CPC Available in IPC and CPC