IPC 6 English version  Class C22
SECTION C– CHEMISTRY; METALLURGY

C 22

METALLURGY (of iron C 21); FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS (general methods or devices for heat treatment of ferrous or non-ferrous metals or alloys C 21 D; production of metals by electrolysis or electrophoresis C 25)

Note

The codes of subclass C 22 K are only for use as indexing codes associated with subclasses C 21 D, C 22 C or C 22 F, so as to provide information concerning changing the physical characteristics of alloys. [6]

C 22 B

PRODUCTION OR REFINING OF METALS (making metallic powder or suspensions thereof B 22 F 9/00; electrolytic C 25); PRETREATMENT OF RAW MATERIALS

C 22 C

ALLOYS (flints C 06 C 15/00; treatment of alloys C 21 D, C 22 F)

C 22 F

CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS (surface treatment of metallic material involving at least one process provided for in class C 23 and at least one process covered by this subclass C 23 F 17/00)

C 22 K

INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C 21 D, C 22 C OR C 22 F, RELATING TO CHANGING THE PHYSICAL CHARACTERISTICS OF ALLOYS [6]
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