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PCE
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DIFF Subgroup
E21C 27/32

by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means E21C27/46)

Introduced: September 1968

Title

Titles differ between systems:

IPC: by adjustable or non-adjustable planing means with or without loading arrangements

CPC: by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means E21C27/46)

Full Title

Full titles differ between systems:

IPC:

Machines which completely free the mineral from the seam > Mineral freed by means not involving slitting > by adjustable or non-adjustable planing means with or without loading arrangements

CPC:

Machines which completely free the mineral from the seam > Mineral freed by means not involving slitting > by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means E21C27/46)

IPC and CPC are identically structured here. All 6 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • E21C 27/36 Machine self-propelled along the working face IPC+CPC Available in IPC and CPC
  • E21C 27/38 Machine stationary while planing in an arc IPC+CPC Available in IPC and CPC
  • E21C 27/40 Machine and its planing tool making alternative step-wise movements along the working face IPC+CPC Available in IPC and CPC
  • E21C 27/42 combined with scraper or collector box IPC+CPC Available in IPC and CPC
  • E21C 27/44 Planing knives (mining picks E21C35/18) IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

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

Top Applicants (CPC)

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

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