Component parts or details of props (E21D15/43, E21D15/58, E21D15/60 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Component parts or details of props

CPC: Component parts or details of props (E21D15/43, E21D15/58, E21D15/60 take precedence)

Full titles differ between systems:

IPC:

Props; Chocks > Component parts or details of props

CPC:

Props (in the building art E04G25/00); Chocks > Component parts or details of props (E21D15/43, E21D15/58, E21D15/60 take precedence)

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

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E21D 15/502 Prop bodies characterised by their shape, e.g. of specified cross-section IPC+CPC Available in IPC and CPC
E21D 15/51 specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves +3 CPC IPC+CPC Available in IPC and CPC
E21D 15/52 Extensible units located above or below standard props (for allowing step-by-step movement of cap E21D23/06; setting props or chocks E21D15/58) +2 CPC IPC+CPC Available in IPC and CPC
E21D 15/54 Details of the ends of props (for permitting step-by-step movement E21D23/06) +1 CPC IPC+CPC Available in IPC and CPC
E21D 15/56 Details of locks of telescopic props +2 CPC IPC+CPC Available in IPC and CPC

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

Class E21,2013–2023, worldwide · Source: EPO PATSTAT