E04D 3/00 Roof covering by making use of flat or curved slabs or stiff sheets (E04D1/00 takes precedence; built-up roofs E04D11/02)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Roof covering by making use of flat or curved slabs or stiff sheets
CPC: Roof covering by making use of flat or curved slabs or stiff sheets (E04D1/00 takes precedence; built-up roofs E04D11/02)
Full Title
Full titles differ between systems:
Roof covering by making use of flat or curved slabs or stiff sheets
Roof covering by making use of flat or curved slabs or stiff sheets (E04D1/00 takes precedence; built-up roofs E04D11/02)
IPC and CPC are identically structured here. All 6 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- E04D 3/02 of plane slabs, slates, or sheets, or in which the cross-section is unimportant (E04D3/35 takes precedence) IPC+CPC Available in IPC and CPC
- E04D 3/24 with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like (E04D3/35 takes precedence) IPC+CPC Available in IPC and CPC
- E04D 3/35 Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation +3 CPC IPC+CPC Available in IPC and CPC
- E04D 3/38 Devices for sealing spaces or joints between roof-covering elements (E04D3/36 takes precedence; sealing joints not restricted to roof-covering elements E04B1/68) IPC+CPC Available in IPC and CPC
- E04D 3/40 Slabs or sheets locally modified for auxiliary purposes, e.g. for resting on walls, for serving as guttering; Elements for particular purposes, e.g. ridge elements, specially designed for use in conjunction with slabs or sheets +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class E04,2013–2023, worldwide · Source: EPO PATSTAT
- CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 6,575
- ZHEJIANG YASHA DECORATION COMPANY 4,488
- SGCC(STATE GRID CORPORATION OF CHINA) 4,427
- CHINA CONSTRUCTION SECOND ENGINEERING BUREAU 4,352
- CHINA MCC17 GROUP COMPANY 3,122
- GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 2,605
- SHENYANG JIANZHU UNIVERSITY 2,420
- CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION COMPANY 2,284
- CHINA CONSTRUCTION FIFTH ENGINEERING DIVISION CORPORATION 2,008
- CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION 1,967
Top Applicants (CPC)
Class E04,2013–2023, worldwide · Source: EPO PATSTAT
- CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 1,675
- CHINA MCC17 GROUP COMPANY 1,593
- ZHEJIANG YASHA DECORATION COMPANY 1,551
- SGCC(STATE GRID CORPORATION OF CHINA) 1,297
- GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 1,212
- SHENYANG JIANZHU UNIVERSITY 926
- VAELINGE INNOVATION SE 901
- CHINA MCC5 GROUP CORPORATION 894
- VKR HOLDING DK 854
- SHANGHAI BAOYE GROUP CORPORATION 753