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SEWERS; CESSPOOLS
Definition statement
This subclass/group covers:

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

Relationship between large subject matter areas

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

References relevant to classification in this subclass
This subclass/group does not cover:
Methods and installations for treatment of sewage
Methods, systems, or installations for draining-off sewage or storm water
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Underground watering of plants
Methods and installations for treatment of water
Drainage of water
Constructional details of cesspools

Examples of places where the subject matter of this group 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 within this group

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 subclass/group 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 relevant to classification in this group
This subclass/group does not cover:
Manufacture of concrete tubes
Constructional details of pipes and pipe fittings in general
Sewerage structures
Definition statement
This subclass/group covers:

Component parts of sewer systems other than conveying pipes.

References relevant to classification in this group
This subclass/group does not cover:
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
Inspection of sewers
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 within this group

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 subclass/group covers:

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

References relevant to classification in this group
This subclass/group 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
Definition statement
This subclass/group covers:

Devices for ensuring functioning of a sewer system.

References relevant to classification in this group
This subclass/group does not cover:
Refuse vehicles
Devices for cleaning sewers
Devices for refurbishing sewers
Installations enabling inspection personnel to drive along sewer canals
Definition statement
This subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Devices for cleaning the interior of sewer canals
Devices for repairing or refurbishing sewer canals
Arrangements or fixed installations [N: methods or devices]for cleaning[N: 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;[N: 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 subclass/group covers:

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

References relevant to classification in this group
This subclass/group does not cover:
Cleaning of inner side of hollow articles
Devices for cleaning or clearing domestic waste pipes
Devices for clearing obstructions in water closets
Sediment traps, rakes, screens, or the like, arranged in sewer lines
Special rules of classification within this group

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 subclass/group covers:

Constructional details of cesspools and other sewage holding tanks.

Relationship between large subject matter areas

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

References relevant to classification in this group
This subclass/group does not cover:
Water treatment tanks
Hand implements for emptying cesspools
Vehicles for emptying cesspools
This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013