C25B ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
Introduced: July 1974
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- Subclass:
- ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
Description
C25B covers electrolytic and electrophoretic processes for synthesizing inorganic and organic compounds, as well as non-metallic substances, along with the specialized equipment used in these operations. This includes electrochemical production of chemicals such as halogens, hydrogen, oxygen, acids, bases, salts, and various industrial compounds through direct electrochemical conversion. The classification also encompasses electrophoretic deposition and separation techniques for preparing non-metallic materials. Related electrorefining and electrowinning of metals are excluded and fall under C25C instead.
Filing statistics
IPC subclass C25B recorded 69,305 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,227 in 2013 to 13,241 in 2023 (+310%). The most active applicants in class C25 are CHINESE ACADEMY OF SCIENCES (1,797 applications), EBARA CORPORATION (729 applications) and CENTRAL SOUTH UNIVERSITY (650 applications).
Source: EPO PATSTAT, worldwide filings
Additional Content
Treatment of water, waste water or sewage by electrochemical means, e.g. electrolysis electrodes therefor Separation or purification of peptides, e.g. of proteins, by electrophoresis Inhibiting corrosion of metals by anodic or cathodic protection Single crystal growth
Related Keywords
8 direct subcodes
Child Classifications
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- C25B 1/00 Electrolytic production of inorganic compounds or non-metals
- C25B 11/00 Electrodes; Manufacture thereof not otherwise provided for
- C25B 13/00 Diaphragms; Spacing elements
- C25B 15/00 Operating or servicing cells
- C25B 3/00 Electrolytic production of organic compounds
- C25B 5/00 Electrogenerative processes, i.e. processes for producing compounds in which electricity is generated simultaneously
- C25B 7/00 Electrophoretic production of compounds or non-metals
- C25B 9/00 Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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