Heat exchanger, heat pump system and dishwasher
US-12535274-B2 · Jan 27, 2026 · US
and being staggered to form tortuous fluid passages
and being staggered to form tortuous fluid passages · 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 | F28F1/38 |
| Official title | and being staggered to form tortuous fluid passages |
| Display label | and being staggered to form tortuous fluid passages |
| Total patents | 28 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 2 |
| 2022 | 4 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Matrix for an Air-Oil Heat Exchanger of a Jet Engine
US-2025305775-A1 · Oct 2, 2025 · US
Heat Exchanger, Heat Pump System and Dishwasher
US-2024003632-A1 · Jan 4, 2024 · US
Thermal management system and method
US-11802734-B2 · Oct 31, 2023 · US
Apparatus for supplying or dissipating heat, for carrying out reactions and for mixing and dispersing flowing media
US-2023219046-A1 · Jul 13, 2023 · US
Integrated exhaust system apparatus
US-11486337-B2 · Nov 1, 2022 · US
Seal structure for heat exchanger and heat exchanger
US-11415379-B2 · Aug 16, 2022 · US
Matrix for an Air/Oil Heat Exchanger of a Jet Engine
US-2022074678-A1 · Mar 10, 2022 · US
Thermal management system and method
US-2022065539-A1 · Mar 3, 2022 · US
Matrix for an air/oil heat exchanger of a jet engine
US-11125511-B2 · Sep 21, 2021 · US
Integrated exhaust system apparatus
US-2021071623-A1 · Mar 11, 2021 · US
Heat exchanger
US-10866016-B2 · Dec 15, 2020 · US
Perturbing air cooled condenser fin
US-2020333077-A1 · Oct 22, 2020 · US
Cooling system with pressure control
US-10808973-B2 · Oct 20, 2020 · US
Seal structure for heat exchanger and heat exchanger
US-2020271399-A1 · Aug 27, 2020 · US
Matrix for an Air/Oil Heat Exchanger of a Jet Engine
US-2019170450-A1 · Jun 6, 2019 · US
Heat exchanger having a coaxial or concentric tube construction
US-10221768-B2 · Mar 5, 2019 · US
Heat exchanger
US-9891008-B2 · Feb 13, 2018 · US
Heat exchanger, refrigeration cycle apparatus, and method of manufacturing heat exchanger
US-9874402-B2 · Jan 23, 2018 · US
Furnace coil modified fins
US-2017343301-A1 · Nov 30, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28F1/38?
- CPC F28F1/38 is the Cooperative Patent Classification code for “and being staggered to form tortuous fluid passages.”
- How many patents are filed under CPC F28F1/38 (and being staggered to form tortuous fluid passages)?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC F28F1/38 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).