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IPC Subgroup
F28G 1/12

Fluid-propelled scrapers, bullets, or like solid bodies

Introduced: September 1968

Last revised: January 2006

Full Title

Non-rotary, e.g. reciprocated, appliances > Fluid-propelled scrapers, bullets, or like solid bodies

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
HEAT EXCHANGE IN GENERAL
Subclass:
CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OF BOILERS

Filing statistics

IPC F28G 1/12 belongs to the parent subclass F28G, which recorded 17,528 patent applications worldwide between 2013 and 2023. Annual filings grew from 596 in 2013 to 3,049 in 2023 (+412%). The most active applicants in class F28 are VALEO SYSTEMES THERMIQUES (1,902 applications), MITSUBISHI ELECTRIC CORPORATION (1,327 applications) and GREE ELECTRIC APPLIANCES (1,152 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

Top 10 applicants by patent filingsfor class F28, 2013–2023, worldwide · Source: EPO PATSTAT

  1. VALEO SYSTEMES THERMIQUES FR 1,902
  2. MITSUBISHI ELECTRIC CORPORATION JP 1,327
  3. GREE ELECTRIC APPLIANCES 1,152
  4. MAHLE INTERNATIONAL DE 999
  5. ALFA LAVAL SE 960
  6. HANON SYSTEMS KR 917
  7. DENSO CORPORATION 905
  8. DENSO CORPORATION JP 802
  9. CHINESE ACADEMY OF SCIENCES 787
  10. XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 762