Furnace inducer choke and a gas furnace employing the same
US-10082287-B2 · Sep 25, 2018 · 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 | F24H3/087 |
| Official title | {using fluid fuel} |
| Display label | using fluid fuel |
| Total patents | 184 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 19 |
| 2017 | 19 |
| 2018 | 23 |
| 2019 | 24 |
| 2020 | 14 |
| 2021 | 16 |
| 2022 | 14 |
| 2023 | 15 |
| 2024 | 12 |
| 2025 | 13 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Reduced drag combustion pass in a tubular heat exchanger
US-2018252433-A1 · Sep 6, 2018 · US
Forced flue heater
US-10041699-B2 · Aug 7, 2018 · US
Heat exchanger
US-10024608-B2 · Jul 17, 2018 · US
Furnace
US-10006661-B2 · Jun 26, 2018 · US
Combustion acoustic noise prevention in a heating furnace
US-9964304-B2 · May 8, 2018 · US
Enhanced Tubular Heat Exchanger
US-2018106500-A1 · Apr 19, 2018 · US
Enhanced Tubular Heat Exchanger
US-2018023895-A1 · Jan 25, 2018 · US
Heat Exchanger Having an Interference Rib
US-2018009070-A1 · Jan 11, 2018 · US
Furnace header box having blocked condensation protection, a furnace including the header box and a blocked condensation protection system
US-9815154-B2 · Nov 14, 2017 · US
Furnace Vent Termination
US-2017320175-A1 · Nov 9, 2017 · US
Fuel-fired heating appliance having improved burner assembly
US-9772119-B2 · Sep 26, 2017 · US
Heat exchanger having an interference rib
US-9770792-B2 · Sep 26, 2017 · US
Condensate Trap for Heating-Cooling Systems
US-2017254563-A1 · Sep 7, 2017 · US
Premix Burner Internal Flue Shield
US-2017241666-A1 · Aug 24, 2017 · US
Flue Baffle
US-2017241668-A1 · Aug 24, 2017 · US
Furnace vent termination
US-9731387-B2 · Aug 15, 2017 · US
Heating furnace using energy saving mode
US-2017211820-A1 · Jul 27, 2017 · US
HVAC systems and methods with improved heat exchangers
US-9714775-B2 · Jul 25, 2017 · US
Gas furnace for indoor heating
US-2017176023-A1 · Jun 22, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F24H3/087?
- CPC F24H3/087 is the Cooperative Patent Classification code for “using fluid fuel.”
- How many patents are filed under CPC F24H3/087 (using fluid fuel)?
- Our database includes 184 publications tagged with this CPC code.
- Is patent activity under CPC F24H3/087 growing?
- Publication counts under this code: 12 in 2024 vs 13 in 2025 (latest complete years).