United States Patent and Trademark Office

Outline		Indent Level
Color		Curly Brackets (indicating CPC extensions to IPC)

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	CPC	COOPERATIVE PATENT CLASSIFICATION

C25C

PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR

C25C 1/00

Electrolytic production, recovery or refining of metals by electrolysis of solutions (C25C 5/00 takes precedence)

C25C 1/02

of light metals

C25C 1/04

. .

in mercury cathode cells

C25C 1/06

or iron group metals, refractory metals or manganese

C25C 1/08

. .

of nickel or cobalt

C25C 1/10

. .

of chromium or manganese

C25C 1/12

of copper

C25C 1/14

of tin

C25C 1/16

of zinc, cadmium or mercury

C25C 1/18

of lead

C25C 1/20

of noble metals

C25C 1/22

of metals not provided for in groups C25C 1/02 to C25C 1/20

C25C 1/24

Alloys obtained by cathodic reduction of all their ions

C25C 3/00

Electrolytic production, recovery or refining of metals by electrolysis of melts (C25C 5/00 takes precedence)

C25C 3/02

of alkali or alkaline earth metals

C25C 3/04

of magnesium

C25C 3/06

of aluminium

C25C 3/08

. .

Cell construction, e.g. bottoms, walls, cathodes

C25C 3/085

. . .

{

characterised by its non electrically conducting heat insulating parts

}

C25C 3/10

. . .

External supporting frames or structures

C25C 3/12

. . .

Anodes

C25C 3/125

. . . .

{

based on carbon

}

C25C 3/14

. .

Devices for feeding or crust breaking

C25C 3/16

. .

Electric current supply devices, e.g. bus bars

C25C 3/18

. .

Electrolytes

C25C 3/20

. .

Automatic control or regulation of cells (controlling or regulating in general G05)

C25C 3/22

. .

Collecting emitted gases

C25C 3/24

. .

Refining

C25C 3/26

of titanium, zirconium, hafnium, tantalum or vanadium

C25C 3/28

. .

of titanium

C25C 3/30

of manganese

C25C 3/32

of chromium

C25C 3/34

of metals not provided for in groups C25C 3/02 to C25C 3/32

C25C 3/36

Alloys obtained by cathodic reduction of all their ions

C25C 5/00

Electrolytic production, recovery or refining of metal powders or porous metal masses

C25C 5/02

from solutions

C25C 5/04

from melts

C25C 7/00

Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells (for the production of aluminium C25C 3/06 to C25C 3/22)

C25C 7/002

{

of cells comprising at least an electrode made of particles (C25C 7/005, C25C 7/02 to C25C 7/06 take precedence)

}

C25C 7/005

{

of cells for the electrolysis of melts (C25C 7/02 to C25C 7/06 take precedence)

}

C25C 7/007

{

of cells comprising at least a movable electrode (C25C 7/002, C25C 7/02 to C25C 7/06 take precedence)

}

C25C 7/02

Electrodes (consumable anodes for the refining the metals C25C 1/00 to C25C 5/00); Connections thereof

C25C 7/025

. .

{

used in cells for the electrolysis of melts

}

C25C 7/04

Diaphragms; Spacing elements

C25C 7/06

Operating or servicing

C25C 7/08

. .

Separating of deposited metals from the cathode