Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
CPC Subgroup
F01K 1/04

for storing steam in a liquid, e.g. Ruth's type (in alkali to increase steam pressure F22B1/20)

Full Title

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)

1 direct subcode

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)

Top Applicants

Top 10 applicants by patent filingsfor class F01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. GE (GENERAL ELECTRIC COMPANY) US 9,989
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 8,110
  3. SAFRAN AIRCRAFT ENGINES FR 6,248
  4. HYUNDAI MOTOR COMPANY KR 4,530
  5. SIEMENS DE 4,461
  6. FORD GLOBAL TECHNOLOGIES US 4,029
  7. RAYTHEON TECHNOLOGIES CORPORATION US 3,947
  8. TOYOTA MOTOR CORPORATION JP 3,734
  9. GE (GENERAL ELECTRIC COMPANY) 3,415
  10. SCHAEFFLER TECHNOLOGIES & COMPANY DE 3,063