Pistons

Introduced: September 1968

Of 10 combined children, 6 exist in both systems.

4 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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F02F 2003/0007 2nd only CPC only CPC only
F02F 3/0015 +3 CPC CPC only CPC only
F02F 3/0076 CPC only CPC only
F02F 3/0084 +1 CPC CPC only CPC only
F02F 3/02 having means for accommodating or controlling heat expansion +3 CPC IPC+CPC Available in IPC and CPC
F02F 3/10 having surface coverings (F02F3/02 takes precedence) +1 CPC IPC+CPC Available in IPC and CPC
F02F 3/16 having cooling means IPC+CPC Available in IPC and CPC
F02F 3/24 having means for guiding gases in cylinders, e.g. for guiding scavenging charge in two-stroke engines IPC+CPC Available in IPC and CPC
F02F 3/26 having combustion chamber in piston head (the surface thereof being covered F02F3/14) IPC+CPC Available in IPC and CPC
F02F 3/28 Other pistons with specially-shaped head +1 CPC IPC+CPC Available in IPC and CPC

Class F02,2013–2023, worldwide · Source: EPO PATSTAT

Class F02,2013–2023, worldwide · Source: EPO PATSTAT