E03D WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
Introduced: September 1968
Description
E03D covers water-closets, urinals, and associated flushing mechanisms that control water discharge for sanitary purposes. This subclass includes the structural design of toilet bowls and urinal fixtures, along with the specialized valves and control systems that regulate water flow during the flush cycle. Patents in this area typically address innovations in valve actuation (mechanical, pneumatic, or electronic), water efficiency mechanisms, and the integration of flushing hardware with sanitary fixtures themselves.
Of 8 combined children, 7 exist in both systems.
1 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.
5 shared codes have differing titles between IPC and CPC.
Child Classifications
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- E03D 11/00 Other component parts of water-closets (pipe-joints or couplings in general F16L ) IPC+CPC Available in IPC and CPC
- E03D 2201/00 Details and methods of use for water closets and urinals not otherwise provided for 2nd only +3 CPC CPC only CPC only
- E03D 3/00 Flushing devices operated by pressure of the water supply system IPC+CPC Available in IPC and CPC
- E03D 5/00 Special constructions of flushing devices (in motor vehicles or trailers B60R15/00; in railway carriages B61D35/00; in ships B63B29/14; in aircraft B64D11/02), +1 CPC IPC+CPC Available in IPC and CPC
- E03D 7/00 Wheeled lavatories (wheeled closets without flushing A47K11/00; construction of land vehicles B62) IPC+CPC Available in IPC and CPC
- E03D 9/00 Sanitary or other accessories for lavatories (hand tools for cleaning the toilet bowl A47K11/10; seats or covers for closets A47K13/00; body supports, other than seats for closets A47K17/02; devices for preventing contamination of drinking-water pipes E03C1/10 ) +3 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
Class E03,2013–2023, worldwide · Source: EPO PATSTAT
- NEOPERL DE 934
- GROHE DE 870
- TOTO 646
- GEBERIT INTERNATIONAL CH 629
- KOHLER COMPANY US 621
- TOTO JP 590
- LIXIL CORPORATION JP 429
- AS AMERICA US 324
- HANSGROHE SE DE 314
- LIXIL CORPORATION 307