Plate-like or laminated elements; Assemblies of plate-like or laminated elements

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:: HEAT EXCHANGE IN GENERAL
Subclass:: DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION

Filing statistics

IPC F28F 3/00 belongs to the parent subclass F28F, which recorded 136,716 patent applications worldwide between 2013 and 2023. Annual filings grew from 8,338 in 2013 to 16,393 in 2023 (+97%), peaking at 17,090 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

Related Keywords

PLATE(S) -like elements for heat-exchange apparatus

3 direct subcodes

Child Classifications

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F28F 3/02 Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
F28F 3/08 Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels

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