F01K 1/04 for storing steam in a liquid, e.g. Ruth's type (in alkali to increase steam pressure F22B1/20)
Introduced: September 1968
Title
Titles differ between systems:
IPC: for storing steam in a liquid, e.g. Ruth type
CPC: for storing steam in a liquid, e.g. Ruth's type (in alkali to increase steam pressure F22B1/20)
Full Title
Full titles differ between systems:
Steam accumulators > for storing steam in a liquid, e.g. Ruth type
Steam accumulators (use of accumulators in steam engine plants F01K3/00) > for storing steam in a liquid, e.g. Ruth's type (in alkali to increase steam pressure F22B1/20)
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- F01K 1/06 Internal fittings facilitating steam distribution, steam formation, or circulation (acting during charging or discharging F01K1/08; fittings facilitating circulation through multiple accumulators F01K1/14) IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F01,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 8,496
- UNITED TECHNOLOGIES CORPORATION (UTC) US 7,291
- SAFRAN AIRCRAFT ENGINES FR 5,503
- TOYOTA MOTOR CORPORATION 4,556
- SIEMENS DE 3,992
- HYUNDAI MOTOR COMPANY KR 3,929
- RAYTHEON TECHNOLOGIES CORPORATION US 3,534
- FORD GLOBAL TECHNOLOGIES US 3,407
- TOYOTA MOTOR CORPORATION JP 3,042
- WEICHAI POWER COMPANY 2,888
Top Applicants (CPC)
Class F01,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 9,989
- UNITED TECHNOLOGIES CORPORATION (UTC) US 8,110
- SAFRAN AIRCRAFT ENGINES FR 6,248
- HYUNDAI MOTOR COMPANY KR 4,530
- SIEMENS DE 4,461
- FORD GLOBAL TECHNOLOGIES US 4,029
- RAYTHEON TECHNOLOGIES CORPORATION US 3,947
- TOYOTA MOTOR CORPORATION JP 3,734
- GE (GENERAL ELECTRIC COMPANY) 3,415
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 3,063