Cross-flow heat exchanger
US-2020224974-A1 · Jul 16, 2020 · US
Tubular elements crimped or corrugated in longitudinal section
Tubular elements crimped or corrugated in longitudinal 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 | F28F1/08 |
| Official title | Tubular elements crimped or corrugated in longitudinal section |
| Display label | Tubular elements crimped or corrugated in longitudinal section |
| Total patents | 137 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 6 |
| 2017 | 16 |
| 2018 | 9 |
| 2019 | 19 |
| 2020 | 11 |
| 2021 | 12 |
| 2022 | 10 |
| 2023 | 15 |
| 2024 | 21 |
| 2025 | 6 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
B-tube reform for improved thermal cycle performance
US-10508870-B2 · Dec 17, 2019 · US
Heat exchanger and reactor
US-2019366290-A1 · Dec 5, 2019 · US
Double-tube internal heat exchanger
US-2019353427-A1 · Nov 21, 2019 · US
Water heater having secondary heat exchanger
US-10473407-B2 · Nov 12, 2019 · US
Heat exchanger tube
US-10422589-B2 · Sep 24, 2019 · US
Adsorber
US-10408509-B2 · Sep 10, 2019 · US
Reduced drag combustion pass in a tubular heat exchanger
US-10401055-B2 · Sep 3, 2019 · US
Method and systems for an egr cooler including cooling tubes with a compliant region
US-2019234351-A1 · Aug 1, 2019 · US
Tube, in particular a flat tube for an exhaust gas cooler and exhaust gas cooler
US-2019186431-A1 · Jun 20, 2019 · US
Non-vaned swirl core configurations
US-10302369-B1 · May 28, 2019 · US
Method and systems for an EGR cooler including cooling tubes with a compliant region
US-10302047-B2 · May 28, 2019 · US
Contoured wall heat exchanger
US-2019154345-A1 · May 23, 2019 · US
Flat tube for a heat exchanger
US-10295275-B2 · May 21, 2019 · US
S-bent tube cooler
US-10254052-B2 · Apr 9, 2019 · US
Heat exchanger
US-10234209-B2 · Mar 19, 2019 · US
Brazed heat exchanger
US-10209014-B2 · Feb 19, 2019 · US
Lightweight flow heat exchanger
US-2019040781-A1 · Feb 7, 2019 · US
Integrated pressure compensating heat exchanger and method
US-10190832-B2 · Jan 29, 2019 · US
Heat pipe
US-10184729-B2 · Jan 22, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28F1/08?
- CPC F28F1/08 is the Cooperative Patent Classification code for “Tubular elements crimped or corrugated in longitudinal section.”
- How many patents are filed under CPC F28F1/08 (Tubular elements crimped or corrugated in longitudinal section)?
- Our database includes 137 publications tagged with this CPC code.
- Is patent activity under CPC F28F1/08 growing?
- Publication counts under this code: 21 in 2024 vs 6 in 2025 (latest complete years).