Radiant tube
US-12435873-B2 · Oct 7, 2025 · US
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in flue gas ducts
in flue gas ducts · 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 | F23M9/003 |
| Official title | {in flue gas ducts} |
| Display label | in flue gas ducts |
| Total patents | 19 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems for water heater baffles on recreational vehicles
US-12352439-B2 · Jul 8, 2025 · US
Systems for water heater baffles on recreational vehicles
US-2024077203-A1 · Mar 7, 2024 · US
Baffle and associated fryer heat exchange system and fryer
US-2024049913-A1 · Feb 15, 2024 · US
Radiant tube
US-2023071781-A1 · Mar 9, 2023 · US
Gas device
US-2022397272-A1 · Dec 15, 2022 · US
Gas furnace to produce heated air and optionally hot water via a bypass pipe
US-11499750-B2 · Nov 15, 2022 · US
Heat exchanger, radiant tube type heating device, and method of manufacturing heat exchanger
US-11209225-B2 · Dec 28, 2021 · US
Gas burner assembly
US-2021341177-A1 · Nov 4, 2021 · US
Gas furnace
US-2021033305-A1 · Feb 4, 2021 · US
Cover assembly, blower assembly and associated method
US-10711795-B2 · Jul 14, 2020 · US
Boiler Heat Exchanger
US-2019271463-A1 · Sep 5, 2019 · US
Heat exchanger, radiant tube type heating device, and method of manufacturing heat exchanger
US-2019219346-A1 · Jul 18, 2019 · US
Heat transfer baffle arrangement for fuel-burning water heater
US-10036570-B2 · Jul 31, 2018 · US
Cover assembly, blower assembly and associated method
US-2018030997-A1 · Feb 1, 2018 · US
Fuel-air-flue gas burner
US-9631808-B2 · Apr 25, 2017 · US
Heat exchanger including flow regulating plates
US-9400102-B2 · Jul 26, 2016 · US
Heat transfer baffle arrangement for fuel-burning water heater
US-2016201944-A1 · Jul 14, 2016 · US
Fuel-air-flue gas burner
US-2016146455-A1 · May 26, 2016 · US