the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another

the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another · 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 codeF28D9/0043
Official title{the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another}
Display labelthe plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
Total patents357

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
201532
201629
201735
201848
201949
202039
202136
202229
202323
202415
202520
20262

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 F28D9/0043?
CPC F28D9/0043 is the Cooperative Patent Classification code for “the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another.”
How many patents are filed under CPC F28D9/0043 (the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another)?
Our database includes 357 publications tagged with this CPC code.
Is patent activity under CPC F28D9/0043 growing?
Publication counts under this code: 15 in 2024 vs 20 in 2025 (latest complete years).