Method for calcining mineral rock in a regenerative parallel-flow vertical shaft furnace and furnace used
US-12344556-B2 · Jul 1, 2025 · US
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Combinations or arrangements of shafts
Combinations or arrangements of shafts · 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 | F27B1/04 |
| Official title | Combinations or arrangements of shafts |
| Display label | Combinations or arrangements of shafts |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 2 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of calcining mineral rock in a regenerative parallel-flow vertical shaft furnace, and furnace used
US-2025162934-A1 · May 22, 2025 · US
Method of calcining mineral rock in a regenerative parallel-flow vertical shaft furnace, and furnace used
US-2025162935-A1 · May 22, 2025 · US
VACUUM SWING CALCINATION PROCESS TO PRODUCE HIGH PURITY CO2 FROM CaCO3
US-2024278176-A1 · Aug 22, 2024 · US
Method and installation for producing lime or dolime
US-2024217873-A1 · Jul 4, 2024 · US
Method of calcining mineral rock in a regenerative parallel-flow vertical shaft furnace, and furnace used
US-2023227353-A1 · Jul 20, 2023 · US
Method for burning carbon-containing material in a pfr shaft furnace
US-2023106711-A1 · Apr 6, 2023 · US
Process for calcining mineral rock in a regenerative parallel-flow vertical shaft furnace, and furnace used
US-11280546-B2 · Mar 22, 2022 · US
System having a furnace and method for operating such a system
US-11034616-B2 · Jun 15, 2021 · US
Furnace and method for operating a furnace
US-10947125-B2 · Mar 16, 2021 · US
Furnace and method for operating a furnace
US-2019345037-A1 · Nov 14, 2019 · US
System having a furnace and method for operating such a system
US-2019077705-A1 · Mar 14, 2019 · US
Process for Calcining Mineral Rock in a Regenerative Parallel-Flow Vertical Shaft Furnace, and Furnace Used
US-2018283788-A1 · Oct 4, 2018 · US
Method for smelting non-ferrous metal sulfides in a suspension smelting furnace and suspension smelting furnace
US-9739535-B2 · Aug 22, 2017 · US
Method for smelting non-ferrous metal sulfides in a suspension smelting furnace and suspension smelting furnace
US-2015300740-A1 · Oct 22, 2015 · US