Method of producing molten iron using electric furnace including video device
US-12566029-B2 · Mar 3, 2026 · US
Screw feeders; Screw dischargers
Screw feeders; Screw dischargers · 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 | F27D3/08 |
| Official title | Screw feeders; Screw dischargers |
| Display label | Screw feeders; Screw dischargers |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of calcining a raw material to obtain a cementitious material
US-2026015286-A1 · Jan 15, 2026 · US
Submerged feedstock charging of melting vessels
US-2025340474-A1 · Nov 6, 2025 · US
Reactor and reactor component
US-2025332562-A1 · Oct 30, 2025 · US
Submerged feedstock charging of melting vessels
US-12371361-B2 · Jul 29, 2025 · US
Cooling system for decoater cyclone dust and related methods
US-2025075980-A1 · Mar 6, 2025 · US
Screw conveyor shaft seal and related methods
US-12227364-B2 · Feb 18, 2025 · US
Sorting device
US-12145895-B2 · Nov 19, 2024 · US
Batch charger for a melting furnace
US-12054414-B2 · Aug 6, 2024 · US
Reaction apparatus, reaction system, material manufacturing system, battery material manufacturing system, battery manufacturing system, reaction product manufacturing method, battery material manufacturing method, and battery manufacturing method
US-2024216881-A1 · Jul 4, 2024 · US
Method of producing molten iron using electric furnace including video device
US-2024085110-A1 · Mar 14, 2024 · US
Translatably mobile batch charger
US-11787722-B2 · Oct 17, 2023 · US
Sorting device
US-2023194173-A1 · Jun 22, 2023 · US
Screw Conveyor Shaft Seal and Related Methods
US-2023174313-A1 · Jun 8, 2023 · US
Method of producing cement clinker and a second calcined material
US-2023002277-A1 · Jan 5, 2023 · US
Batch charger for a melting furnace
US-2022250960-A1 · Aug 11, 2022 · US
Batch charger for a melting chamber
US-11358895-B2 · Jun 14, 2022 · US
Submerged feedstock charging of melting vessels
US-2022098076-A1 · Mar 31, 2022 · US
Cooled conveyor for decoating systems
US-10883774-B2 · Jan 5, 2021 · US
Translatably mobile batch charger
US-2020290912-A1 · Sep 17, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F27D3/08?
- CPC F27D3/08 is the Cooperative Patent Classification code for “Screw feeders; Screw dischargers.”
- How many patents are filed under CPC F27D3/08 (Screw feeders; Screw dischargers)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC F27D3/08 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).