CPC Definition - Subclass C25C
This place covers:
Electrolytic production or recovery (electrowinning) of metals and alloys from solutions or melts.
Electrorefining of metals and alloys in solutions or melts.
Constructional parts, cells or assemblies of cells for the electrolytic production, recovery or refining of metals or alloys.
Servicing or operating of cells for the electrolytic production, recovery or refining of metals or alloys.
- Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process provided for in class C25 are classified in group C23F 17/00
- The electrolytic or electrophoretic purification of materials is classified according to the nature of the liquid in the relevant places, e.g. A01K 63/00, C02F 1/46, C25B 15/08, C25D 21/16, C25F 7/02
- The electrolytic deposition of coatings (electroplating), the electrophoretic production of coatings and electroforming is classified in C25D.
- Alloys as such, prepared by electrolytic methods are classified in C22C.
This place does not cover:
Removing metallic impurities from waste water or sewage by electrolytic methods | |
Inhibiting corrosion of metals by anodic or cathodic protection | |
Single crystal growth |
Attention is drawn to the following places, which may be of interest for search:
Catalysts comprising metals, metal oxides or hydroxides | |
Processes for preparing catalysts | |
Refining molten metal during a continuous casting process | |
General processes of refining metals | |
Composition of alloys | |
Multistep processes for surface treatment of metallic material | |
Electrodes, membranes for fuel cells |
Classify also in C25C 5/04, when applicable.
In this place, the following terms or expressions are used with the meaning indicated:
Melt | molten salt or ionic liquid or fused bath |
Attention is drawn to the following places, which may be of interest for search:
Electrodes used in cells for the electrolysis of melts, other than aluminium production |
Attention is drawn to the following places, which may be of interest for search:
Electrodes used in cells for the electrolysis of melts, other than aluminium production | |
Carbon masses | |
Electrodes used for heating by electrical discharge, electrodes mainly consisting of carbon, self-baking type (e.g. Söderberg anodes) | H01B7/09 |
Heating by electrical discharge, electrodes mainly consisting of carbon |
In this place, the following terms or expressions are used with the meaning indicated:
Söderberg anode | An electrode used in metallurgy, which continuously forms in an electrical furnace when a mixture of coke and coal-tar pitch is added to a heated steel casing and is baked as it passes through. It emerges into the furnace where it is continuously consumed. |
This place covers:
Electrolytic production of the metal (titanium, hafnium, tantalum, vanadium) by the direct reduction of the metal ion at the electrode.
Reduction of the metal oxide by another metal (usually calcium) which is itself electrolytically reduced from the electrolyte (usually calcium chloride), although the reduction step of the metal ions is chemical rather than electrolytic.
Documents involving the latter reaction should also be considered by a classifier in C22B 34/00.
Classification should also be made in C25C 5/04, when applicable.
This place covers:
Electrolytic production of titanium by the direct reduction of the metal ion at the electrode.
Reduction of titanium oxide by another metal (usually calcium) which is itself electrolytically reduced from the electrolyte (usually calcium chloride), although the reduction step of the titanium ions is chemical rather than electrolytic.
Documents involving the latter reaction should also be considered by a classifier in C22B 34/12.
This place covers:
Movable electrodes, be it electrodes that move in space or electrodes that move around an axis, such as rotary electrodes.
Attention is drawn to the following places, which may be of interest for search:
Diaphragms used in the electrolytic or electrophoretic production of compounds or non-metals | |
Membranes for fuel cells |
In patent documents, the following words/expressions are often used as synonyms:
- "diaphragm" and "membrane"
This place covers:
Operating or servicing of cells, when generally applied to a cell or in a process of C25C.
Attention is drawn to the following places, which may be of interest for search:
Controlling or regulating in general |