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PCE
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DIFF Subgroup
B64D 37/20

Emptying systems

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Arrangements in connection with fuel supply for power plant > Tanks > Filling or emptying > Emptying systems

CPC:

Arrangements in connection with fuel supply for power plant (refuelling during flight B64D39/00) > Tanks (tanks constructed integrally with aircraft wings B64C3/34) > Filling or emptying (transferring fuels to adjust aircraft trim B64C17/10) > Emptying systems

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

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  • B64D 37/22 facilitating emptying in any position of tank IPC+CPC Available in IPC and CPC
  • B64D 37/24 using gas pressure IPC+CPC Available in IPC and CPC
  • B64D 37/26 Jettisoning of fuel IPC+CPC Available in IPC and CPC
  • B64D 37/28 Control thereof IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B64,2013–2023, worldwide · Source: EPO PATSTAT

  1. BOEING COMPANY US 8,583
  2. AIRBUS OPERATIONS DE 3,430
  3. AIRBUS OPERATIONS FR 2,757
  4. HAMILTON SUNDSTRAND US 2,332
  5. SZ DJI TECHNOLOGY COMPANY CN 2,109
  6. AIRBUS OPERATIONS GB 2,084
  7. GOODRICH CORPORATION US 2,053
  8. XI'AN AIRCRAFT DESIGN INSTITUTE OF AVIATION INDUSTRY CORPORATION OF CHINA 1,938
  9. BOEING COMPANY 1,816
  10. NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS 1,589

Top Applicants (CPC)

Class B64,2013–2023, worldwide · Source: EPO PATSTAT

  1. BOEING COMPANY US 9,861
  2. AIRBUS OPERATIONS DE 3,766
  3. AIRBUS OPERATIONS FR 3,112
  4. SZ DJI TECHNOLOGY COMPANY CN 2,840
  5. HAMILTON SUNDSTRAND US 2,753
  6. GOODRICH CORPORATION US 2,427
  7. AIRBUS OPERATIONS GB 2,356
  8. BOEING COMPANY 2,057
  9. SAFRAN AIRCRAFT ENGINES FR 1,815
  10. AIRBUS OPERATIONS 1,723