PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; JOINING WORKPIECES BY ELECTROLYSIS; APPARATUS THEREFOR

Introduced: July 1974

Last revised: January 1995

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
Subclass:: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; JOINING WORKPIECES BY ELECTROLYSIS; APPARATUS THEREFOR

Description

C25D covers electroplating, electroless plating, and electrophoretic deposition processes used to apply protective or decorative metallic and non-metallic coatings onto substrates. It also encompasses electroforming techniques for creating metal parts by electrodeposition and electrolytic joining methods for assembling workpieces. This subclass includes apparatus designs, process parameters, and electrolyte formulations specific to these coating and forming operations, distinguishing it from general electrochemical processes (C25A) and electrorefining or electrowinning operations (C25C).

Filing statistics

IPC subclass C25D recorded 91,892 patent applications worldwide between 2013 and 2023. Annual filings grew from 5,748 in 2013 to 10,628 in 2023 (+85%). 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

Limiting references

Laminating metals Treatment of water, waste water, or sewage by electrochemical means, e.g. electrolysis Inhibition of corrosion by anodic or cathodic protection Compositions for electrophoretic coating, e.g. electrografting Single crystal growth

Application references

Metallising textiles Decorating textiles by locally metallising Manufacturing printed circuits by metal deposition

Related Keywords

CATAPHORESISCOATING metal by electrolysisCOATING metal by electrophoresisCOATING non-metals with metals electrolyticallyCOATING with metals by electrolysisELECTRODEPOSITION of metalsdecorating by ELECTROLYSISdepositing metals by ELECTROLYSISsurface treatment of metal by ELECTROLYSISELECTROLYTIC production of coatingsELECTROPHORESISelectrolytic surface treatment of or with IRONelectrolytic non-mechanical surface treatment METAL(S)METALLISING by electrolysis

12 direct subcodes

Child Classifications

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C25D 1/00 Electroforming
C25D 11/00 Electrolytic coating by surface reaction, i.e. forming conversion layers
C25D 13/00 Electrophoretic coating characterised by the process
C25D 15/00 Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
C25D 17/00 Constructional parts, or assemblies thereof, of cells for electrolytic coating
C25D 19/00 Electrolytic coating plants
C25D 2/00 Joining workpieces by electrolysis
C25D 21/00 Processes for servicing or operating cells for electrolytic coating
C25D 3/00 Electroplating; Baths therefor
C25D 5/00 Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
C25D 7/00 Electroplating characterised by the article coated
C25D 9/00 Electrolytic coating other than with metals

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