CPC Definition - Subclass B03C
This place covers:
- Magnetic separation
- Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- Separating dispersed particles from liquids by electrostatic effect
- Separating solids from solids by electrostatic effect
- Separation by high-voltage electrical fields
B01D is the general subclass for separation. This subclass, B03C, covers magnetic or electrostatic separation of solid materials from solid materials or fluids, as well as separation by high-voltage electric fields. However, separation of isotopes by high-voltage electric fields or by magnetic or electrostatic separation is covered by main group B01D 59/00.
This place does not cover:
Separating isotopes | |
Combinations of magnetic or electrostatic separation with separation of solids by other means |
Attention is drawn to the following places, which may be of interest for search:
Filters making use of electricity or magnetism | |
Separating sheets from piles | |
Magnets or magnet coils per se |
This place covers:
Separation of particles out of a fluid or a stream of particles using magnetic effects.
Attention is drawn to the following places, which may be of interest for search:
Separation, e.g. filters in general | |
Processes for separating dispersed particles from gases or vapours by gravity, inertia or centrifugal forces | |
Combinations of cyclones with filters, for separating particles from gases or vapours | |
Processes for separation of gases or vapours or for recovering vapours of volatile solvents from gases by centrifugal force | |
Flotation; Differential sedimentation | |
Devices for separating or removing fatty or oily substances or similar floating material from water, waste water or sewage | |
Device in sewers for separating liquid or solid substances from sewage | |
Chemical analysis of biological material | |
Measuring, investigating or testing electric or magnetic properties of materials | |
Materials for magnets or magnetic bodies |
The following Indexing Codes are used:
- Magnetic separation of gases from gases, e.g. oxygen from air, is classified with indexing symbol B03C 2201/16.
- Magnetic separation of particles suspended in a liquid is classified with indexing symbol B03C 2201/18.
- Magnetic separation of particles that are in a solid form is classified with indexing symbol B03C 2201/20.
- Magnetic separation characterised by magnetic field, special shape or generation is classified with indexing symbol B03C 2201/22.
- Magnetic separation characterised by parts that are easily removable for cleaning purposes is classified with indexing symbol B03C 2201/28.
- Magnetic separation used in or with vehicles is classified with indexing symbol B03C 2201/30.
This place covers:
Any type of magnetic separation method that uses a high gradient magnetic field, which is directly acting on the substance being seperated.
This place does not cover:
Magnetic separation device that uses a high gradient magnetic field acting directly on the substance being separated | |
High gradient magnetic separation acting on the medium |
This place covers:
Any type of magnetic adjuvants not having an advanced chemical reaction with the particles to be separated.
This place covers:
Any type of magnetic adjuvants having a chemical reaction with the particles to be separated.
This place covers:
Magnetic separation devices that use high gradient magnetic fields.
Attention is drawn to the following places, which may be of interest for search:
Magnetic separation methods that use high gradient magnetic fields |
Attention is drawn to the following places, which may be of interest for search:
Matrix elements |
This place covers:
Any detail about the construction of the superconductive coil.
Attention is drawn to the following places, which may be of interest for search:
Superconductive coils for open gradient separators |
This place covers:
Any detail about the construction of the magnetic matrix of the matrix cleaning system.
Attention is drawn to the following places, which may be of interest for search:
High gradient separators having (circulating) matrix elements |
Attention is drawn to the following places, which may be of interest for search:
Details about the construction of the superconductive coil |
This place covers:
Magnetic separation in which either (a) the material to be separated or (b) the separated material is moved with cylindrical means.
This place does not cover:
With material carried by travelling fields obtained by a rotating drum |
Attention is drawn to the following places, which may be of interest for search:
Devices whereby the material to be separated or the separated material is moved with cylindrical means |
This place does not cover:
Open gradient magnetic separators, i.e. separators in which the gap is unobstructed, characterised by the configuration of the gap |
This place covers:
Devices or methods for separating particles contained in a liquid.
The following Indexing Codes are used:
- Magnetic separation for particles suspended in a liquid is classified with indexing symbol B03C 2201/18.
- Magnetic separation for use in medical applications is classified with indexing symbol B03C 2201/26.
This place covers:
Typically used when the magnetic separation is part of a bigger process. However, documents should not be classified here when no (sufficient) details of the magnetic separation are disclosed
Attention is drawn to the following places, which may be of interest for search:
Sink-float separation using heavy liquids or suspensions |
This place covers:
Methods or devices using an electrostatic effect for separating dispersed particles from gases or vapours, e.g. devices that use electrostatic effects for filtering air.
Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:
Exhaust or silencing apparatus for machines or engines having means for removing solid constituents of exhaust, using electric or electrostatic separators |
Attention is drawn to the following places, which may be of interest for search:
Domestic cleaning implements actuated by electrostatic attraction; Devices for cleaning same | |
Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases (e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols) by electrostatic effects or by high-voltage electric fields | |
Cleaning by electrostatic means | |
Electric elements specially adapted for carrying off electrostatic charges from vehicles | |
Treatment of water, waste water, or sewage by electrochemical methods | |
Electrostatic machines | |
Carrying-off electrostatic charges in general |
When the electrostatic effect is not used for separating, it should not be classified here.
The following Indexing Codes are used:
- Electrostatic separation including cleaning of the device by burning trapped particles is classified with indexing symbol B03C 2201/12.
- Electrostatic separation for gas that is moved electro-kinetically is classified with indexing symbol B03C 2201/14.
- Electrostatic separation including measuring or calculating of parameters or efficiency is classified with indexing symbol B03C 2201/24.
- Electrostatic separation for use in medical applications is classified with indexing symbol B03C 2201/26.
- Electrostatic separation for use in or with vehicles is classified with indexing symbol B03C 2201/30.
- Electrostatic separation including checking the quality of the result or the well-functioning of the device is classified with indexing symbol B03C 2201/32.
In this place, the following terms or expressions are used with the meaning indicated:
Separating | Dimensional modifications of particle-liquid distributions, e.g. particle immobilisation, caging, translational or rotational motion |
In patent documents, the following abbreviations are often used:
ESP | electrostatic precipitator |
DEP | di-electrophoresis |
nDEP or pDEP | negative di-electrophoresis or positive di-electrophoresis |
This place covers:
Mechanical filtering or flow control before the actual ESP filter.
Attention is drawn to the following places, which may be of interest for search:
Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators, dry-wet separator combinations | |
Mechanical filtering combined with the ESP filter | |
Controlling flow of gases or vapour in the ESP filter |
This place covers:
Adding water for the purpose of changing the characteristics of the gas mixture to be treated.
This place covers:
Typically used when the electrostatic separation is part of a bigger process. However, documents should not be classified here when no (sufficient) details of the electrostatic separation are disclosed
This place covers:
Mechanical filtering or flow control after the actual ESP filter.
Attention is drawn to the following places, which may be of interest for search:
Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators, dry-wet separator combinations | |
Mechanical filtering combined with the ESP filter |
This place covers:
Devices wherein a bundle of tube electrodes is used.
This place covers:
Any device where the gas stream is forced to change direction to flow between the flat electrodes or where the gas stream is passing through the electrodes e.g. grid-electrodes
This place does not cover:
Transportable units, e.g. for cleaning room air |
Attention is drawn to the following places, which may be of interest for search:
Separating particles from gases by gravity |
Attention is drawn to the following places, which may be of interest for search:
Separating particles from gases by centrifuges | |
Centrifuges in general | |
Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force |
This place covers:
Mechanical filtering combined with the actual ESP filter.
Attention is drawn to the following places, which may be of interest for search:
Mechanical filtering before the actual ESP filter | |
Mechanical filtering after the actual ESP filter | |
Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators, dry-wet separator combinations |
This place covers:
Devices where the added liquid (e.g. water) is not completely absorbed by the treated gas.
Attention is drawn to the following places, which may be of interest for search:
Adding water for the purpose of changing the characteristics of the gas mixture to be treated | |
Liquid, or liquid-film, electrodes | |
Cleaning the electrodes, e.g. by washing |
Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:
Room air-conditioners having an electrostatic separating stage |
This place covers:
Flow control in the actual ESP filter.
Attention is drawn to the following places, which may be of interest for search:
Flow control before the ESP filter | |
Flow control after the ESP filter | |
Combinations of electrostatic separators, e.g. in parallel or in series, stacked separators, dry-wet separator combinations | |
Mechanical dry-type filtering, e.g. combined with the ESP filter |
This place covers:
The flow control is located at the entrance of the ESP
This place covers:
The flow control is located at the exit of the ESP
This place covers:
Particle charging or ionising stations in which particles are electrostatically charged for the purpose of separating them, e.g. using electric discharge, radioactive radiation or flames.
Attention is drawn to the following places, which may be of interest for search:
Electrode constructions | |
Disinfection, sterilisation or deodorisation of air by ionisation | |
Air-conditioning systems applying an electrostatic field | |
Apparatus for generating ions to be introduced into non-enclosed gases | |
Ionising gases |
Indexing Symbols B03C 2201/04 – B03C 2201/10 have to be given in order to describe the type of electrode.
The following indexing symbols are used:
- Ionising electrode wires are classified with indexing symbol B03C 2201/04.
- Ionising electrode needles are classified with indexing symbol B03C 2201/06.
- Ionising electrode rods are classified with indexing symbol B03C 2201/08.
- Ionising electrodes including multiple serrated ends or parts are classified with indexing symbol B03C 2201/10.
This place does not cover:
Liquid, or liquid-film, electrodes |
Attention is drawn to the following places, which may be of interest for search:
This place covers:
The details of the electrodes themselves
This place does not cover:
Collecting electrodes specially adapted for heat exchange with the gas stream |
Attention is drawn to the following places, which may be of interest for search:
Any type of device where a bundle of tube electrodes is used |
This place covers:
Details about the electrical power supply of the ESP, except the emergency control aspects.
This place does not cover:
Electricity supply or control systems for cleaning the electrodes |
Attention is drawn to the following places, which may be of interest for search:
Emergency control systems | |
Power supply for an electrostatic spraying apparatus |
This place does not cover:
Liquid, or liquid-film, electrodes |
This subclass does not only cover the cleaning of the electrodes, but also covers all details about cleaning the interior of the ESP.
The following indexing symbols are used:
- Cleaning the device by burning of trapped particles is classified with indexing symbol B03C 2201/12.
- Parts being easily removable for cleaning purposes is classified with indexing symbol B03C 2201/28.
- Measuring or calculating parameters or efficiency are classified with indexing symbol B03C 2201/24.
- Checking the quality of the result or the well-functioning of the device is classified with indexing symbol B03C 2201/32.
This place does not cover:
Electricity supply or control systems of the ESP |
This place does not cover:
Electricity supply or control systems of the ESP |
This place covers:
Devices using a liquid where the purpose of the liquid is to clean.
This place covers:
Details about the (mechanical) fixation of the electrodes (including the electrical isolators).
This place does not cover:
Electrode constructions |
This place covers:
Any detail about the removal of particles that have already been removed from the electrodes and/or walls.
Attention is drawn to the following places, which may be of interest for search:
Cleaning of the electrodes |
This place does not cover:
Flocculation or agglomeration of electric particles induced by electric field | |
Combined with centrifuges |
Attention is drawn to the following places, which may be of interest for search:
Separation, other than separation of solids, not fully covered by a single other group or subclass, (e.g. B03C) by electrophoresis | |
Microreactors | |
Treatment of microorganisms and apparatus therefor | |
Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means using electrophoresis | |
Analysis of biomaterial by electrical means |
The following indexing symbols are used:
- Electrostatic separation including measuring or calculating parameters or efficiency, is classified with indexing symbol B03C 2201/24.
- Electrostatic separation for use in medical applications, is classified with indexing symbol B03C 2201/26.
- Electrostatic separation including checking of the quality of the result or the well-functioning of the device, is classified with indexing symbol B03C 2201/32.
In patent documents, the following abbreviations are often used:
ESP | electrostatic precipitator |
DEP | di-electrophoresis |
nDEP or pDEP | negative di-electrophoresis or positive di-electrophoresis |
This place covers:
Any method using di-electrophoresis for separating particles from a fluid. Separating fluids from fluids is in B03C 11/00
This place does not cover:
Any device using di-electrophoresis for separating particles from a fluid. |
Attention is drawn to the following places, which may be of interest for search:
Electrophoresis |
Attention is drawn to the following places, which may be of interest for search:
Dielectrophoresis, i.e. dielectric particles migrating towards the region of highest field strength for separating dispersed particles from liquids by electrostatic effect |
This place covers:
Electrostatic separation not provided for in any single one of the other main groups of this subclass, e.g. other types of electrostatic separation, except for electrostatically separating liquids from liquids by high-voltage electrical fields.
Examples of places in relation to which this place is residual:
Attention is drawn to the following places, which may be of interest for search:
Electro-statically separating liquids from liquids by high-voltage electrical fields, not provided for in other groups of this subclass |
This place covers:
This group is used for electrostatically separating liquids from liquids by high-voltage electrical fields, not provided for in other groups of this subclass.
Attention is drawn to the following places, which may be of interest for search:
Separation of liquids with coalescers | |
Separation of liquids from each other by electricity | |
Filters i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours including coalescing means for the separation of liquid | |
Refining of hydrocarbons oils by electric or magnetic mean |
The following Indexing Codes are used:
- Electrostatically separating liquids from liquids, is classified with indexing symbol B03C 2201/02.