Device for heating a medium
US-12474046-B2 · Nov 18, 2025 · US
Flame tubes (not forming part of the burner F23M9/06) · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F23D11/404 |
| Official title | {Flame tubes (not forming part of the burner F23M9/06)} |
| Display label | Flame tubes (not forming part of the burner F23M9/06) |
| Total patents | 21 |
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 1 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 3 |
| 2023 | 1 |
| 2025 | 1 |
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
US-12474046-B2 · Nov 18, 2025 · US
US-2023304659-A1 · Sep 28, 2023 · US
US-11525379-B2 · Dec 13, 2022 · US
US-11312209-B2 · Apr 26, 2022 · US
US-2022112826-A1 · Apr 14, 2022 · US
US-11131481-B2 · Sep 28, 2021 · US
US-11052729-B2 · Jul 6, 2021 · US
US-10995958-B2 · May 4, 2021 · US
US-10995948-B2 · May 4, 2021 · US
US-2020348048-A1 · Nov 5, 2020 · US
US-2020072467-A1 · Mar 5, 2020 · US
US-2020023712-A1 · Jan 23, 2020 · US
US-2019277502-A1 · Sep 12, 2019 · US
US-2019232758-A1 · Aug 1, 2019 · US
US-2019170348-A1 · Jun 6, 2019 · US
US-10215402-B2 · Feb 26, 2019 · US
US-2017284661-A1 · Oct 5, 2017 · US
US-2016223196-A1 · Aug 4, 2016 · US
US-9243531-B2 · Jan 26, 2016 · US
US-2015211733-A1 · Jul 30, 2015 · US