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PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
Definition statement
This subclass covers:

Electrolytic cleaning, degreasing, pickling or descaling

Electrolytic etching or polishing

Polishing or etching using a plasma which is generated at the surface of the workpiece by a voltage applied thereto in an electrolyte

Electrolytic stripping of metallic layers or coatings

Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects, servicing or operating

References relevant to classification in this subclass
This subclass does not cover:

Working of metal by the action of electric current on a workpiece, electrochemical machining, electrolytic grinding, electro-erosion

Non-mechanical removal of metallic material from surfaces

Inhibiting corrosion of metals by anodic or cathodic protection

Constructional parts or assemblies thereof, of cells for both electrolytic coating and removal

Wafer treatment

Processes specially adapted for treatment of semi-conductors or solid state devices, e.g. electrolytic etching

Informative references
Attention is drawn to the following places, which may be of interest for search:

Chemical cleaning involving a liquid and additional treatment, e.g. electricity

Polishing or grinding with abrasive particles

Lapping machines u sing both abrasives substances and theapplication of electrical current

After-treatment of articles using an electrical field, without altering their shape or form

Polishing compositions

Multistep processes for surface treatment of metallic material

Measuring using electrical means

Analyzing materials with electro- chemical means

Non-contact plasma polishing

Electrolytic cleaning, degreasing, pickling or de-scaling
Glossary of terms
In this group, the following terms (or expressions) are used with the meaning indicated:

Electrolytic cleaning

removing impurities from a surface by electrolytic action

Electrolytic degreasing

removing grease from a surface by electrolytic action

Electrolytic pickling or de-scaling

removing oxide or scale from a surface by electrolytic action

Melt

molten salt or ionic liquid or fused bath

Electrolytic etching or polishing
Relationship between large subject matter areas

Methods of polishing or grinding using electric current where the electrolyte comprises abrasive material would be classified in B24B 37/046

Special rules of classification within this group

An electrolyte specified in a document is classified in C25F 3/00 even when it concerns one of the fields listed under "references" of subclass C25F. Exception: electrolytes comprising abrasive material are not classified in C25F 3/00.

Glossary of terms
In this group, the following terms (or expressions) are used with the meaning indicated:

Electrolytic etching

dissolving by - electrolytic action or - a plasma which is generated at the surface of the workpiece by a voltage applied to the electrodes in the electrolyte, such that a rough surface is obtained

Electrolytic polishing

dissolving by - electrolytic action or - by a plasma which is generated at the surface of the workpiece by a voltage applied to the electrodes in the electrolyte, such that a smooth surface is obtained

of semiconducting materials
Glossary of terms
In this subgroup, the following terms (or expressions) are used with the meaning indicated:

Semiconducting material

the material as such, not a workpiece which is a semiconductor (e.g. a wafer)

locally
Definition statement
This subgroup covers:

Locally electrolytic etching where the portions to be etched are determined only by a mask or a template

of semiconducting materials
Glossary of terms
In this subgroup, the following terms (or expressions) are used with the meaning indicated:

Semiconducting material

the material as such, not a workpiece which is a semiconductor (e.g. a wafer)

Electrolytic stripping of metallic layers or coatings
Definition statement
This group covers:

Removing an entire layer or coating, even when this layer or coating is already partially damaged (e.g. removing NiCrAlY from a turbine blade to be reworked)

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Last Modified: 10/11/2013