Cooperative Patent Classification

CPC Definition - Subclass E03F

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Last Updated Version: 2016.11
SEWERS; CESSPOOLS
Definition statement

This place covers:

Methods and installations for conveying waste water and precipitation water towards treatment installations and/or natural flowing bodies.

Relationships with other classification places

Methods and installations for the treatment of such used water which are not part of the conveying system are classified in C02F.

References
Limiting references

This place does not cover:

Methods and installations for treatment of sewage

Methods, systems, or installations for draining-off sewage or storm water
Definition statement

This place covers:

Methods and devices for conveying used water pneumatically; disposing sewage into the landscape.

References
Limiting references

This place does not cover:

Constructional details of cesspools

Underground watering of plants

Methods and installations for treatment of water

Drainage of water

Application-oriented references

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:

Arrangement of water closets specially adapted to motor vehicles or trailers

Arrangement of water closets specially adapted to railway carriages

Flushed water closets specially adapted to ships

Flushed water closets specially adapted to aircrafts

Informative references

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

Conveying materials through pipes by aire

Constructional details of down-pipes

Special rules of classification

Service stations for fresh and used water, e.g. for camping sites, are classified in E03F 1/00 and in E02B 9/02.

Means for distributing outflowing water from roof down-pipes onto the ground are classified in E03F 1/00. Means integrated into the downpipe are classified in E04D 13/08.

Sewer pipe-line systems
Definition statement

This place covers:

Lay-out and constructional details of pipe systems specially adapted to sewage.

Arrangements of cables within sewer pipes, e.g. for electricity or telecommunication.

References
Limiting references

This place does not cover:

Manufacture of concrete tubes

Constructional details of pipes and pipe fittings in general

Sewerage structures
Definition statement

This place covers:

Component parts of sewer systems other than conveying pipes.

References
Limiting references

This place does not cover:

Inspection of sewers

Mechanical filtering in general

Large underground containers

Details of pavings and gutters

Making sewers in situ

Manhole shafts and covers not specially adapted to sewage

Digging of trenches

Methods of laying pipes underground

Devices for covering leaks in pipes

Control of flow in general , e.g. throttles

Informative references

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

Connection of manhole covers to shaft

Special rules of classification

Elongated water inlet structures with gratings are classified in E03F 3/046 and in E03F 5/06, if details of both parts of the structure are disclosed.

Documents describing grinding of sewage are classified in E03F 5/22 and E03F 5/26.

Emergency outlets
Definition statement

This place covers:

Sewer channels or stormwater holding tanks with means for allowing surplus water to be discharged in a controlled way.

References
Limiting references

This place does not cover:

Devices for separating unwanted substances from flowing sewage which are integrated in the sewer system

Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
Definition statement

This place covers:

Devices for ensuring functioning of a sewer system.

References
Limiting references

This place does not cover:

Devices for refurbishing sewers

Devices for cleaning sewers

Refuse vehicles

Installations enabling inspection personnel to drive along sewer canals
Definition statement

This place covers:

Devices enabling inspection of interior of sewer canals, whether or not manned and whether or not moved through the canal.

References
Limiting references

This place does not cover:

Devices for repairing or refurbishing sewer canals

Devices for cleaning the interior of sewer canals

Arrangements or fixed installations {methods or devices} for cleaning {or clearing} sewer pipes, e.g. by flushing (sediment traps, rakes, screens, or the like, arranged in sewer lines E03F 5/14; cleaning pipes in general, devices for cleaning pipes B08B 9/02; {gullies provided with flushing means for cleaning or emptying E03F 5/0402; devices to remove obstructions in waste-pipes or sinks E03C 1/30})
Definition statement

This place covers:

Devices for cleaning the interior of a sewer canal in order to improve flow through the canal.

References
Limiting references

This place does not cover:

Sediment traps, rakes, screens, or the like, arranged in sewer lines

Cleaning of inner side of hollow articles

Devices for cleaning or clearing domestic waste pipes

Devices for clearing obstructions in water closets

Special rules of classification

Devices which can be used for sewer canals and domestic drain pipes are classified here.

Cesspools (emptying cesspools E03F 7/00; features relating to treatment of sewage C02F)
Definition statement

This place covers:

Constructional details of cesspools and other sewage holding tanks.

Relationships with other classification places

Methods and devices for treatment of water in a cesspool: C02F.

References
Limiting references

This place does not cover:

Hand implements for emptying cesspools

Vehicles for emptying cesspools

Water treatment tanks