CPC Subgroup
C25C 7/04 Diaphragms; Spacing elements
Full Title
Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells (for the production of aluminium C25C3/06 - C25C3/22) > Diaphragms; Spacing elements
Filing statistics
CPC C25C 7/04 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
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