Screws that cut thread in the body into which they are screwed, e.g. wood screws

Introduced: September 1968

Title

Titles differ between systems:

IPC: Screws that form threads in the body into which they are screwed, e.g. wood screws, self-tapping screws

CPC: Screws that cut thread in the body into which they are screwed, e.g. wood screws

Full titles differ between systems:

IPC:

Screws that form threads in the body into which they are screwed, e.g. wood screws, self-tapping screws

CPC:

Screws that cut thread in the body into which they are screwed, e.g. wood screws

Of 8 combined children, 1 exist in both systems.

3 codes are CPC-only extensions, 4 exist only in IPC.

IPC defines codes here since 1985.

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F16B 25/0005 CPC only CPC only
F16B 25/001 +4 CPC CPC only CPC only
F16B 25/0036 +5 CPC CPC only CPC only
F16B 25/02 by a cutting and material removing action, e.g. fluted self-tapping screws since 1985 IPC only IPC only
F16B 25/04 by a slicing and material displacing action, e.g. wood screws with sharp thread crests since 1985 IPC only IPC only
F16B 25/06 by swaging, i.e. material deforming action since 1985 IPC only IPC only
F16B 25/08 by a combination of any two or all of the actions provided for in groups since 1985 IPC only IPC only
F16B 25/10 Screws performing an additional function to thread-forming, e.g. drill screws since 1985 +2 CPC IPC+CPC Available in IPC and CPC

Class F16,2013–2023, worldwide · Source: EPO PATSTAT

Class F16,2013–2023, worldwide · Source: EPO PATSTAT