DIFF Main Group
F28F 11/00 Arrangements for sealing leaky tubes and conduits (stopping flow from or in pipes in general F16L55/10)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Arrangements for sealing leaky tubes or conduits
CPC: Arrangements for sealing leaky tubes and conduits (stopping flow from or in pipes in general F16L55/10)
Full Title
Full titles differ between systems:
IPC:
Arrangements for sealing leaky tubes or conduits
CPC:
Arrangements for sealing leaky tubes and conduits (stopping flow from or in pipes in general F16L55/10)
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F28F 11/02 using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence) IPC+CPC Available in IPC and CPC
- F28F 11/04 using pairs of obturating elements, e.g. washers, mounted upon central operating rods (F28F11/06 takes precedence) IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F28,2013–2023, worldwide · Source: EPO PATSTAT
- VALEO SYSTEMES THERMIQUES FR 1,902
- MITSUBISHI ELECTRIC CORPORATION JP 1,327
- GREE ELECTRIC APPLIANCES 1,152
- MAHLE INTERNATIONAL DE 999
- ALFA LAVAL SE 960
- HANON SYSTEMS KR 917
- DENSO CORPORATION 905
- DENSO CORPORATION JP 802
- CHINESE ACADEMY OF SCIENCES 787
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 762
Top Applicants (CPC)
Class F28,2013–2023, worldwide · Source: EPO PATSTAT
- VALEO SYSTEMES THERMIQUES FR 1,945
- MITSUBISHI ELECTRIC CORPORATION JP 1,518
- MAHLE INTERNATIONAL DE 1,120
- ALFA LAVAL SE 1,085
- HANON SYSTEMS KR 939
- DENSO CORPORATION JP 900
- LG ELECTRONICS KR 861
- HAMILTON SUNDSTRAND US 795
- DAIKIN INDUSTRIES JP 608
- DENSO CORPORATION 537