Evaporator unit for a fuel-operated vehicle heater
US-11198347-B2 · Dec 14, 2021 · US
the capillary action taking place in one or more rigid porous bodies
the capillary action taking place in one or more rigid porous bodies · 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 | F23D3/40 |
| Official title | the capillary action taking place in one or more rigid porous bodies |
| Display label | the capillary action taking place in one or more rigid porous bodies |
| Total patents | 78 |
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 | 4 |
| 2016 | 2 |
| 2017 | 7 |
| 2018 | 15 |
| 2019 | 8 |
| 2020 | 11 |
| 2021 | 13 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 5 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for operating a fuel-operated vehicle heater and fuel-operated vehicle heater
US-11162680-B2 · Nov 2, 2021 · US
Fluid distributors for fluid nozzles
US-2021332981-A1 · Oct 28, 2021 · US
Method for operating a fuel-operated vehicle heater
US-11142041-B2 · Oct 12, 2021 · US
Combustion chamber assembly unit for a fuel-operated vehicle heater
US-2021283985-A1 · Sep 16, 2021 · US
Vehicle heater
US-11104206-B2 · Aug 31, 2021 · US
Flame-resistant wick
US-2021247065-A1 · Aug 12, 2021 · US
Flame-resistant wick
US-11079104-B2 · Aug 3, 2021 · US
Combustion chamber assembly unit
US-11072222-B2 · Jul 27, 2021 · US
Evaporator assembly for mobile heating devices
US-2021215335-A1 · Jul 15, 2021 · US
Combustion chamber assembly unit
US-11027593-B2 · Jun 8, 2021 · US
Systems and methods for in-situ clean up of burnable materials
US-10900186-B2 · Jan 26, 2021 · US
Magnetically secured burner cap
US-10895381-B2 · Jan 19, 2021 · US
Flame-resistant wick
US-2020400307-A1 · Dec 24, 2020 · US
Evaporator unit for a fuel-operated vehicle heater
US-2020384832-A1 · Dec 10, 2020 · US
Magnetically secured burner cap
US-2020370748-A1 · Nov 26, 2020 · US
Burner arrangement for heater
US-10823397-B2 · Nov 3, 2020 · US
Combustion chamber assembly unit
US-2020182456-A1 · Jun 11, 2020 · US
Combustion chamber assembly unit
US-2020148034-A1 · May 14, 2020 · US
Combustion Device
US-2020088401-A1 · Mar 19, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F23D3/40?
- CPC F23D3/40 is the Cooperative Patent Classification code for “the capillary action taking place in one or more rigid porous bodies.”
- How many patents are filed under CPC F23D3/40 (the capillary action taking place in one or more rigid porous bodies)?
- Our database includes 78 publications tagged with this CPC code.
- Is patent activity under CPC F23D3/40 growing?
- Publication counts under this code: 5 in 2024 vs 3 in 2025 (latest complete years).