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DIFF Subgroup
F17D 3/03

for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another

Introduced: July 1974

Full Title

Arrangements for supervising or controlling working operations > for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

Child Classifications

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  • F17D 3/05 the different products not being separated (separation of contaminants by distillation B01D3/00) since 1974 IPC+CPC Available in IPC and CPC
  • F17D 3/08 the different products being separated by "go-devils", e.g. spheres (cleaning devices moved along inside a pipe-lines by fluid pressure B08B9/04; ) since 1974 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F17,2013–2023, worldwide · Source: EPO PATSTAT

  1. DAEWOO SHIPBUILDING & MARINE ENGINEERING COMPANY KR 1,622
  2. GAZ TRANSPORT ET TECHNIGAZ FR 1,588
  3. L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,470
  4. SAMSUNG HEAVY INDUSTRIES KR 1,287
  5. HYUNDAI HEAVY INDUSTRIES COMPANY KR 989
  6. TOYOTA MOTOR CORPORATION 830
  7. LINDE DE 703
  8. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 666
  9. ROBERT BOSCH DE 654
  10. BMW (BAYERISCHE MOTOREN WERKE) DE 511

Top Applicants (CPC)

Class F17,2013–2023, worldwide · Source: EPO PATSTAT

  1. GAZ TRANSPORT ET TECHNIGAZ FR 1,718
  2. L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,633
  3. DAEWOO SHIPBUILDING & MARINE ENGINEERING COMPANY KR 1,570
  4. SAMSUNG HEAVY INDUSTRIES KR 1,174
  5. HYUNDAI HEAVY INDUSTRIES COMPANY KR 988
  6. LINDE DE 757
  7. ROBERT BOSCH DE 696
  8. BMW (BAYERISCHE MOTOREN WERKE) DE 523
  9. TOYOTA MOTOR CORPORATION JP 515
  10. KAWASAKI HEAVY IND JP 456