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PCE
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DIFF Subgroup
E21B 25/10

Formed core retaining or severing means (E21B25/06, E21B25/08 take precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: Formed core retaining or severing means

CPC: Formed core retaining or severing means (E21B25/06, E21B25/08 take precedence)

Full Title

Full titles differ between systems:

IPC:

Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors > Formed core retaining or severing means

CPC:

Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors (core bits E21B10/02) > Formed core retaining or severing means (E21B25/06, E21B25/08 take precedence)

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1980.

Child Classifications

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  • E21B 25/12 of the sliding wedge type since 1980 IPC+CPC Available in IPC and CPC
  • E21B 25/14 mounted on pivot transverse to core axis since 1980 IPC+CPC Available in IPC and CPC