CPC Main Group
C25C 3/00 Electrolytic production, recovery or refining of metals by electrolysis of melts (C25C5/00 takes precedence)
Filing statistics
CPC C25C 3/00 belongs to the parent subclass C25C, which recorded 14,864 patent applications worldwide between 2013 and 2023. Annual filings grew from 901 in 2013 to 1,549 in 2023 (+72%), peaking at 1,599 applications in 2016. The most active applicants in class C25 are CHINESE ACADEMY OF SCIENCES (1,393 applications), JFE STEEL (914 applications) and EBARA CORPORATION (738 applications).
Source: EPO PATSTAT, worldwide filings
8 direct subcodes
Child Classifications
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- C25C 3/02 of alkali or alkaline earth metals
- C25C 3/04 of magnesium
- C25C 3/06 of aluminium
- C25C 3/26 of titanium, zirconium, hafnium, tantalum or vanadium
- C25C 3/30 of manganese
- C25C 3/32 of chromium
- C25C 3/34 of metals not provided for in groups C25C3/02 - C25C3/32
- C25C 3/36 Alloys obtained by cathodic reduction of all their ions
Top Applicants
Top 10 applicants by patent filingsfor class C25, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 1,393
- JFE STEEL JP 914
- EBARA CORPORATION JP 738
- INDUSTRIE DE NORA IT 674
- JX NIPPON MINING & METALS CORPORATION JP 652
- NIPPON STEEL CORPORATION JP 633
- CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 630
- ROBERT BOSCH DE 626
- SIEMENS DE 587
- ATOTECH DEUTSCHLAND DE 561