3D structures and methods therefor
US-11453158-B2 · Sep 27, 2022 · US
the conduits having a non-circular cross-section
the conduits having a non-circular cross-section · 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 | F28D1/0535 |
| Official title | {the conduits having a non-circular cross-section} |
| Display label | the conduits having a non-circular cross-section |
| Total patents | 77 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 10 |
| 2019 | 5 |
| 2020 | 12 |
| 2021 | 11 |
| 2022 | 11 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Heat transfer fin and fin-tube type heat exchanger unit using the same
US-11448472-B2 · Sep 20, 2022 · US
Manufacturing process for heat exchangers
US-2022288729-A1 · Sep 15, 2022 · US
Heat exchanger
US-2022268497-A1 · Aug 25, 2022 · US
Heat exchanger with improved plugging resistance
US-11346608-B2 · May 31, 2022 · US
Air conditioner
US-2022120451-A1 · Apr 21, 2022 · US
Heat exchanger
US-11255619-B2 · Feb 22, 2022 · US
Hermetically sealed cap for heat exchanger modulator
US-2022041033-A1 · Feb 10, 2022 · US
Heat exchanger and air conditioner
US-11181328-B2 · Nov 23, 2021 · US
Heat exchanger or refrigeration apparatus including heat exchanger
US-11181305-B2 · Nov 23, 2021 · US
Stress relieving additively manufactured heat exchanger fin design
US-2021333055-A1 · Oct 28, 2021 · US
Inner fin and flat tube including an inner fin
US-2021247149-A1 · Aug 12, 2021 · US
Battery cooler
US-2021249711-A1 · Aug 12, 2021 · US
Aluminum alloy heat exchanger
US-2021199395-A1 · Jul 1, 2021 · US
Heat exchanger, heat exchanger unit, and refrigeration cycle apparatus
US-2021180878-A1 · Jun 17, 2021 · US
Heat exchanger with varying surface roughness
US-2021180888-A1 · Jun 17, 2021 · US
Air conditioner
US-11022372-B2 · Jun 1, 2021 · US
Heat exchanger
US-2021108869-A1 · Apr 15, 2021 · US
Heat transfer system
US-2021095926-A1 · Apr 1, 2021 · US
Heat exchanger or refrigeration apparatus including heat exchanger
US-2020363107-A1 · Nov 19, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28D1/0535?
- CPC F28D1/0535 is the Cooperative Patent Classification code for “the conduits having a non-circular cross-section.”
- How many patents are filed under CPC F28D1/0535 (the conduits having a non-circular cross-section)?
- Our database includes 77 publications tagged with this CPC code.
- Is patent activity under CPC F28D1/0535 growing?
- Publication counts under this code: 3 in 2024 vs 7 in 2025 (latest complete years).