Melting method using multiple impacting flames
US-2025362081-A1 · Nov 27, 2025 · US
Apparatus for preheating charges; Arrangements for preheating charges
Apparatus for preheating charges; Arrangements for preheating charges · 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 | F27D13/00 |
| Official title | Apparatus for preheating charges; Arrangements for preheating charges |
| Display label | Apparatus for preheating charges; Arrangements for preheating charges |
| Total patents | 62 |
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 | 8 |
| 2016 | 9 |
| 2017 | 8 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 6 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 1 |
| 2025 | 10 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Calcination apparatus and processes with improved co2 capture
US-2025313508-A1 · Oct 9, 2025 · US
Blast furnace operation method
US-12378615-B2 · Aug 5, 2025 · US
Process for decarbonation of carbonated materials and device thereof
US-2025197278-A1 · Jun 19, 2025 · US
Spiral Baffle System
US-2025198701-A1 · Jun 19, 2025 · US
Low-carbon production method and system for cement clinker
US-2025197281-A1 · Jun 19, 2025 · US
Biomass direct reduced iron
US-2025179596-A1 · Jun 5, 2025 · US
Methods for preheating metal-containing pellets
US-12305926-B2 · May 20, 2025 · US
Method of producing molten iron
US-2025003684-A1 · Jan 2, 2025 · US
Method and apparatus for alumina calcination
US-2024308868-A1 · Sep 19, 2024 · US
Blast furnace operation method
US-2023175085-A1 · Jun 8, 2023 · US
Plant and method for treating solid material
US-2023101178-A1 · Mar 30, 2023 · US
Organic sludge treatment device and treatment method
US-11591246-B2 · Feb 28, 2023 · US
Thermal treatment of mineral raw materials using a mechanical fluidised bed reactor
US-2023047215-A1 · Feb 16, 2023 · US
Tower structure of a pre-heating tower of a plant for thermally processing minerals, and method for constructing the pre-heating tower
US-2023031197-A1 · Feb 2, 2023 · US
Aluminum warm forming multi-opening oven and production line
US-11471925-B2 · Oct 18, 2022 · US
Fast response heaters and associated control systems used in combination with metal treatment furnaces
US-11268765-B2 · Mar 8, 2022 · US
Methods for Preheating Metal-Containing Pellets
US-2021364237-A1 · Nov 25, 2021 · US
Apparatus and method for feeding material
US-11167347-B2 · Nov 9, 2021 · US
Oxy-fuel combustion system and method for melting a pelleted charge material
US-11060792-B2 · Jul 13, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F27D13/00?
- CPC F27D13/00 is the Cooperative Patent Classification code for “Apparatus for preheating charges; Arrangements for preheating charges.”
- How many patents are filed under CPC F27D13/00 (Apparatus for preheating charges; Arrangements for preheating charges)?
- Our database includes 62 publications tagged with this CPC code.
- Is patent activity under CPC F27D13/00 growing?
- Publication counts under this code: 1 in 2024 vs 10 in 2025 (latest complete years).