Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport E21F13/00)

Introduced: July 1974

Title

Titles differ between systems:

IPC: Devices for removing or hauling away excavated material or spoil; Working or loading platforms

CPC: Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport E21F13/00)

Full Title

Full titles differ between systems:

IPC:

Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries > Devices for removing or hauling away excavated material or spoil; Working or loading platforms

CPC:

Tunnels or galleries, with or without linings; Methods or apparatus for making thereof (E02D29/045, E02D29/063 take precedence; linings per se E21D11/00); Layout of tunnels or galleries > Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport E21F13/00)

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 2000.

Child Classifications

Navigate with arrow keys, Enter to open

E21D 9/122 CPC only CPC only
E21D 9/124 CPC only CPC only
E21D 9/126 +1 CPC CPC only CPC only
E21D 9/13 using hydraulic or pneumatic conveying means since 2000 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

HALLIBURTON ENERGY SERVICES GROUP US 26,607
PETROCHINA COMPANY 14,382
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 10,137
CNPC (CHINA NATIONAL PETROLEUM CORPORATION) 6,517
BAKER HUGHES US 6,269
SCHLUMBERGER TECHNOLOGY US 5,929
SAUDI ARABIAN OIL COMPANY SA 5,880
SOUTHWEST PETROLEUM UNIVERSITY 4,477
CHINA UNIVERSITY OF MINING AND TECHNOLOGY 4,357
SCHLUMBERGER TECHNOLOGY NL 4,219

Top Applicants (CPC)

Class E21,2013–2023, worldwide · Source: EPO PATSTAT

HALLIBURTON ENERGY SERVICES GROUP US 27,652
SAUDI ARABIAN OIL COMPANY SA 7,755
PETROCHINA COMPANY 7,025
BAKER HUGHES US 6,589
SCHLUMBERGER TECHNOLOGY US 6,151
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 4,443
SCHLUMBERGER TECHNOLOGY NL 4,255
CNPC (CHINA NATIONAL PETROLEUM CORPORATION) 3,991
SERVICES PETROLIERS SCHLUMBERGER FR 3,300
SCHLUMBERGER CANADA CA 3,086