C25F PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
Introduced: July 1974
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- Subclass:
- PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
Description
C25F encompasses electrochemical processes and equipment designed to selectively remove material layers or deposits from solid objects through electrolysis. This includes electropolishing, electrorefining, electrostripping of coatings, and electrolytic cleaning or descaling applications across metallic and non-metallic substrates. The classification covers both the procedural parameters (current control, electrolyte composition, electrode configuration) and the apparatus configuration required for material removal, distinguishing it from electrodeposition (C25D) which adds material rather than removing it.
Additional Content
Limiting references
Treatment of water, waste water or sewage by electrochemical means, e.g. electrolysis Inhibiting corrosion of metals by anodic or cathodic protection Constructional parts, or assemblies thereof, of cells for both electrolytic coating and electrolytic removal
Application references
Electrolytic etching of semiconductor wafers or parts of semiconductor or solid-state devices
Related Keywords
4 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- C25F 1/00 Electrolytic cleaning, degreasing, pickling, or descaling
- C25F 3/00 Electrolytic etching or polishing
- C25F 5/00 Electrolytic stripping of metallic layers or coatings
- C25F 7/00 Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
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