of the closed type

of the closed type · Cooperative Patent Classification (CPC)

Engines, pumps, lighting, heating, and mechanical systems.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeF24C3/004
Official title{of the closed type}
Display labelof the closed type
Total patents30

Filing trend

Year-over-year patent counts classified under this CPC code.

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
20151
20164
20172
20186
20194
20205
20213
20222
20231
20252

Representative patents

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.

Frequently asked questions

Answers are generated from the same data shown on this page.

What is CPC F24C3/004?
CPC F24C3/004 is the Cooperative Patent Classification code for “of the closed type.”
How many patents are filed under CPC F24C3/004 (of the closed type)?
Our database includes 30 publications tagged with this CPC code.
Is patent activity under CPC F24C3/004 growing?
Publication counts under this code: 1 in 2023 vs 2 in 2025 (latest complete years).