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PCE
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DIFF Subgroup
C21D 8/1277

involving a particular surface treatment (C21D8/1294 takes precedence)

Introduced: January 2026

Title

Titles differ between systems:

IPC: involving a particular surface treatment

CPC: involving a particular surface treatment (C21D8/1294 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment > during manufacturing of articles with special electromagnetic properties > involving a particular surface treatment

CPC:

Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment (hardening articles or materials formed by forging or rolling with no further heating beyond that required for the formation C21D1/02) > during manufacturing of articles with special electromagnetic properties > involving a particular surface treatment (C21D8/1294 takes precedence)

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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