Heat recovery system adaptable to a sink
US-2022316803-A1 · Oct 6, 2022 · US
the conduits being spirally coiled (F28D7/10 takes precedence){(F28D7/0016 and F28D7/0033 take precedence)}
the conduits being spirally coiled (F28D7/10 takes precedence){(F28D7/0016 and F28D7/0033 take precedence)} · 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 | F28D7/04 |
| Official title | the conduits being spirally coiled (F28D7/10 takes precedence){(F28D7/0016 and F28D7/0033 take precedence)} |
| Display label | the conduits being spirally coiled (F28D7/10 takes precedence){(F28D7/0016 and F28D7/0033 take precedence)} |
| Total patents | 86 |
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 | 6 |
| 2017 | 8 |
| 2018 | 11 |
| 2019 | 7 |
| 2020 | 8 |
| 2021 | 9 |
| 2022 | 11 |
| 2023 | 7 |
| 2024 | 8 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gas turbine engine heat exchanger for annular flowpaths
US-11378341-B2 · Jul 5, 2022 · US
Polymerization Using a Spiral Heat Exchanger
US-2022162348-A1 · May 26, 2022 · US
Centre body in spiral heat exchanger
US-11333439-B2 · May 17, 2022 · US
Polymerization using a spiral heat exchanger
US-11279775-B2 · Mar 22, 2022 · US
Heat exchanger
US-2022065544-A1 · Mar 3, 2022 · US
Method for overheating gases at the inlet of a SOEC/SOFC-type solid oxide stack
US-11228047-B2 · Jan 18, 2022 · US
Fluid routing methods for a spiral heat exchanger with lattice cross section made via additive manufacturing
US-11193716-B2 · Dec 7, 2021 · US
Coil wound heat exchanger
US-2021348850-A1 · Nov 11, 2021 · US
Compressed-air heat exchanger, dehumidification unit using heat exchanger, and dehumidification system provided with dehumidification unit
US-11135548-B2 · Oct 5, 2021 · US
3D spiral heat exchanger
US-11060796-B2 · Jul 13, 2021 · US
Gas Turbine Engine Heat Exchanger for Annular Flowpaths
US-2021207534-A1 · Jul 8, 2021 · US
Additively manufactured spiral diamond heat exchanger
US-2021190441-A1 · Jun 24, 2021 · US
Heat exchanger component with varying twist angle
US-2021180870-A1 · Jun 17, 2021 · US
Cerium and cerium oxide containing alloys, fuel cell system balance of plant components made therefrom and method of making thereof
US-11001915-B1 · May 11, 2021 · US
Centre body in spiral heat exchanger
US-2021123682-A1 · Apr 29, 2021 · US
Spiral heat exchanger
US-2020300552-A1 · Sep 24, 2020 · US
Polymerization Using a Spiral Heat Exchanger
US-2020231710-A1 · Jul 23, 2020 · US
Spiral heat exchanger as preheater in polymer devolatilization processes
US-10718571-B2 · Jul 21, 2020 · US
Heating devices and apparatus
US-2020221899-A1 · Jul 16, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F28D7/04?
- CPC F28D7/04 is the Cooperative Patent Classification code for “the conduits being spirally coiled (F28D7/10 takes precedence){(F28D7/0016 and F28D7/0033 take precedence)}.”
- How many patents are filed under CPC F28D7/04 (the conduits being spirally coiled (F28D7/10 takes precedence){(F28D7/0016 and F28D7/0033 take precedence)})?
- Our database includes 86 publications tagged with this CPC code.
- Is patent activity under CPC F28D7/04 growing?
- Publication counts under this code: 8 in 2024 vs 6 in 2025 (latest complete years).