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

Introduced: July 1974

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
Subclass:: PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR

Description

C25C covers electrolytic methods and equipment for producing, recovering, or refining metals from ores, scrap, or intermediate compounds through electrochemical reduction or oxidation. This subclass encompasses aqueous and molten salt electrolysis, electrowinning, electrorefining, and electroplating processes applied to ferrous and non-ferrous metals including copper, zinc, nickel, aluminum, and precious metals. Typical apparatus covered include electrolytic cells, cathodes, anodes, electrolytes, and auxiliary equipment for current distribution and process control. Adjacent subclass C25D addresses electroplating and related coating processes, while C25B covers electrolysis of inorganic compounds not primarily directed at metal extraction.

Additional Content

Treatment of water, waste water, or sewage by electrochemical means, e.g. electrolysis electrodes therefor Inhibiting corrosion of metals by anodic or cathodic protection Single crystal growth

Related Keywords

making ALLOYS by electrolytic methodsobtaining or refining metals or alloys by ELECTROLYSISELECTROLYTIC production, recovery or refining of metalsproduction of IRON or steel by electrolytic processesMEMBRANES for electrolytic cellsproducing or refining NON-FERROUS alloys by electrolytic processesproducing or refining NON-FERROUS metals by electrolytic processestreating ORES to obtain other metals, alloys or compounds by electrolytic treatment

4 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

C25C 1/00 Electrolytic production, recovery or refining of metals by electrolysis of solutions
C25C 3/00 Electrolytic production, recovery or refining of metals by electrolysis of melts
C25C 5/00 Electrolytic production, recovery or refining of metal powders or porous metal masses
C25C 7/00 Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells

Top Applicants

Top 10 applicants by patent filingsfor class C25, 2013–2023, worldwide · Source: EPO PATSTAT

CHINESE ACADEMY OF SCIENCES 1,797
EBARA CORPORATION JP 729
CENTRAL SOUTH UNIVERSITY 650
INDUSTRIE DE NORA IT 641
ROBERT BOSCH DE 600
JFE STEEL JP 593
KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 553
SIEMENS DE 536
CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 525
JX NIPPON MINING & METALS CORPORATION 499