Heat dissipation assembly
US-11448331-B2 · Sep 20, 2022 · US
Communication passages between channels
Communication passages between channels · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F28F2250/04 |
| Official title | Communication passages between channels |
| Display label | Communication passages between channels |
| Total patents | 73 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 6 |
| 2019 | 5 |
| 2020 | 17 |
| 2021 | 10 |
| 2022 | 10 |
| 2023 | 8 |
| 2024 | 3 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Monolithic heat-exchanger bodies
US-2022290630-A1 · Sep 15, 2022 · US
Heat exchange core and heat exchanger
US-2022252352-A1 · Aug 11, 2022 · US
Engine apparatus and method for operation
US-2022195959-A1 · Jun 23, 2022 · US
Monolithic heat-exchanger bodies
US-11346302-B2 · May 31, 2022 · US
Heat exchanger
US-2022146203-A1 · May 12, 2022 · US
Heat exchanger
US-2022120500-A1 · Apr 21, 2022 · US
Energy conversion apparatus
US-11268476-B2 · Mar 8, 2022 · US
Heat exchanger
US-11248854-B2 · Feb 15, 2022 · US
Energy conversion apparatus
US-2022034281-A1 · Feb 3, 2022 · US
Mixing between flow channels of cast plate heat exchanger
US-11209224-B2 · Dec 28, 2021 · US
Constant density heat exchanger and system for energy conversion
US-2021381467-A1 · Dec 9, 2021 · US
Monolithic combustor bodies
US-11181072-B2 · Nov 23, 2021 · US
Energy conversion apparatus
US-11174814-B2 · Nov 16, 2021 · US
Constant density heat exchanger and system for energy conversion
US-11125184-B2 · Sep 21, 2021 · US
Monolithic heater bodies
US-11022068-B2 · Jun 1, 2021 · US
Energy conversion apparatus and control system
US-10961949-B2 · Mar 30, 2021 · US
Monolithic heat-exchanger bodies
US-2021062756-A1 · Mar 4, 2021 · US
Heat exchanger
US-2021055064-A1 · Feb 25, 2021 · US
Heat exchanger
US-2021003352-A1 · Jan 7, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28F2250/04?
- CPC F28F2250/04 is the Cooperative Patent Classification code for “Communication passages between channels.”
- How many patents are filed under CPC F28F2250/04 (Communication passages between channels)?
- Our database includes 73 publications tagged with this CPC code.
- Is patent activity under CPC F28F2250/04 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).