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PCE
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DIFF Subgroup
C04B 35/52

based on carbon, e.g. graphite

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products > based on non-oxides > based on carbon, e.g. graphite

CPC:

Shaped ceramic products characterised by their composition ; Ceramics compositions ( containing free metal bonded to carbides, diamond, oxides, borides, nitrides, silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides or sulfides other than as macroscopic reinforcing agents C22C); Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products > based on non-oxide ceramics > based on carbon, e.g. graphite

Of 5 combined children, 3 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 1995.

Child Classifications

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  • C04B 35/521 CPC only CPC only
  • C04B 35/522 CPC only CPC only
  • C04B 35/524 obtained from polymer precursors, e.g. glass-like carbon material since 1995 IPC+CPC Available in IPC and CPC
  • C04B 35/536 based on expanded graphite since 1995 IPC+CPC Available in IPC and CPC