E03F SEWERS; CESSPOOLS
Introduced: September 1968
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- WATER SUPPLY; SEWERAGE
- Subclass:
- SEWERS; CESSPOOLS
Description
E03F covers the design, construction, and components of sewerage systems and individual wastewater containment structures. This includes sewage pipes, conduits, underground mains, connection networks, inspection and access points (manholes), and treatment-related infrastructure for collecting and transporting municipal and domestic wastewater. Also encompassed are cesspools, septic tanks, and similar on-site wastewater storage or treatment devices for areas lacking centralized sewerage. The classification excludes water supply systems (E03B), water purification and treatment plants (E03C), and the mechanical/chemical processes of wastewater treatment itself (typically C05 or other process classes).
Related Keywords
6 direct subcodes
Child Classifications
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- E03F 1/00 Methods, systems, or installations for draining-off sewage or storm water
- E03F 11/00 Cesspools
- E03F 3/00 Sewer pipe-line systems
- E03F 5/00 Sewerage structures
- E03F 7/00 Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F 9/00 Arrangements or fixed installations for cleaning sewer pipes, e.g. by flushing
Top Applicants
Top 10 applicants by patent filingsfor class E03, 2013–2023, worldwide · Source: EPO PATSTAT
- TOTO 2,957
- LIXIL CORPORATION 1,646
- XIAMEN RT PLUMBING TECHNOLOGY COMPANY 925
- NEOPERL DE 870
- GROHE DE 828
- PANASONIC INTELLECTUAL PROPERTY 738
- WUHAN SHENGYU DRAINAGE SYSTEMS COMPANY 727
- GEBERIT INTERNATIONAL CH 613
- KOHLER COMPANY US 570
- TOTO JP 549