Other direct-contact heat-exchange apparatus

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:: HEAT EXCHANGE IN GENERAL
Subclass:: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION

Filing statistics

IPC F28C 3/00 belongs to the parent subclass F28C, which recorded 18,596 patent applications worldwide between 2013 and 2023. Annual filings grew from 811 in 2013 to 2,407 in 2023 (+197%), peaking at 2,528 applications in 2020. 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

4 direct subcodes

Child Classifications

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F28C 3/02 the heat-exchange media both being gases or vapours
F28C 3/04 the heat-exchange media both being liquids
F28C 3/06 the heat-exchange media being a liquid and a gas or vapour
F28C 3/1 one heat-exchange medium at least being a fluent solid, e.g. a particulate material

Top Applicants

Top 10 applicants by patent filingsfor 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