Air heating apparatus
US-2026071828-A1 · Mar 12, 2026 · US
using fluid fuel
using fluid fuel · 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 | F24H3/006 |
| Official title | {using fluid fuel} |
| Display label | using fluid fuel |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 2 |
| 2021 | 6 |
| 2022 | 7 |
| 2024 | 7 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for hybrid heating system control
US-2026055928-A1 · Feb 26, 2026 · US
Systems and methods for operating a furnace system
US-12359846-B2 · Jul 15, 2025 · US
Variable capacity furnace control
US-12320551-B2 · Jun 3, 2025 · US
Method, system and temperature control of a heating, ventilation and air conditioning unit
US-12305887-B2 · May 20, 2025 · US
Systems and methods of detecting an obstructed furnace air filter using a pressure sensor
US-2024410608-A1 · Dec 12, 2024 · US
Ammonia decomposition system
US-2024316519-A1 · Sep 26, 2024 · US
Systems and methods of detecting an obstructed furnace air filter using a pressure sensor
US-12092352-B2 · Sep 17, 2024 · US
Hybrid furnace with fuel and/or electricity
US-2024280261-A1 · Aug 22, 2024 · US
Fuel-fired appliance with exhaust dilution
US-12066217-B2 · Aug 20, 2024 · US
Systems and methods of detecting an obstructed furnace air filter using a flame sensor
US-12013135-B2 · Jun 18, 2024 · US
Efficient limit switch design and its location in a gas furnace
US-11885532-B2 · Jan 30, 2024 · US
Condensate water trap for gas furnace
US-11519636-B2 · Dec 6, 2022 · US
Variable capacity furnace control
US-2022381480-A1 · Dec 1, 2022 · US
Fuel-fired appliance with exhaust dilution
US-2022196289-A1 · Jun 23, 2022 · US
Air heating apparatus
US-2022178623-A1 · Jun 9, 2022 · US
Systems and methods for operating a furnace system
US-2022136736-A1 · May 5, 2022 · US
Systems and methods of detecting an obstructed furnace air filter using a flame sensor
US-2022042706-A1 · Feb 10, 2022 · US
Systems and methods of detecting an obstructed furnace air filter using a pressure sensor
US-2022042707-A1 · Feb 10, 2022 · US
Fuel-fired appliance with exhaust dilution
US-11209188-B2 · Dec 28, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F24H3/006?
- CPC F24H3/006 is the Cooperative Patent Classification code for “using fluid fuel.”
- How many patents are filed under CPC F24H3/006 (using fluid fuel)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC F24H3/006 growing?
- Publication counts under this code: 7 in 2024 vs 3 in 2025 (latest complete years).