Method for producing direct reduction iron
US-2024410027-A1 · Dec 12, 2024 · US
Heat exchange
Heat exchange · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C21B2100/66 |
| Official title | Heat exchange |
| Display label | Heat exchange |
| Total patents | 74 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 10 |
| 2017 | 6 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 5 |
| 2022 | 5 |
| 2023 | 8 |
| 2024 | 13 |
| 2025 | 8 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for operating a blast furnace plant
US-2024400384-A1 · Dec 5, 2024 · US
Enrichment of Iron from Bauxite Waste in Chemical Looping Combustion
US-2024360525-A1 · Oct 31, 2024 · US
System and method for reducing ore using hydrogen as a reducing agent
US-2024336986-A1 · Oct 10, 2024 · US
Device for manufacturing molten iron
US-12084731-B2 · Sep 10, 2024 · US
Pre-reduced pellet preparation apparatus and method based on grate-rotary kiln
US-2024279767-A1 · Aug 22, 2024 · US
Method for producing steel in an integrated metallurgical plant
US-2024271232-A1 · Aug 15, 2024 · US
System and method for reducing ore using hydrogen as a reducing agent
US-12043874-B2 · Jul 23, 2024 · US
Method for manufacturing direct reduced iron and dri manufacturing equipment
US-2024240275-A1 · Jul 18, 2024 · US
Method for manufacturing Direct Reduced Iron and DRI manufacturing equipment
US-2024240276-A1 · Jul 18, 2024 · US
Smart hydrogen production for dri making
US-2024052441-A1 · Feb 15, 2024 · US
Biomass Direct Reduced Iron
US-2023366051-A1 · Nov 16, 2023 · US
Biomass direct reduced iron
US-2023332258-A1 · Oct 19, 2023 · US
Modular direct reduction systems and associated methods
US-2023295755-A1 · Sep 21, 2023 · US
Hot Metal Production from DRI with Electric Arc Heating
US-2023287528-A1 · Sep 14, 2023 · US
A direct reduction system and relative process
US-2023243004-A1 · Aug 3, 2023 · US
Method for producing reduced iron
US-2023167517-A1 · Jun 1, 2023 · US
Hydrogen release/storage system, hydrogen release/storage method, ammonia production equipment, gas turbine, fuel cell, and steel mill
US-2023159324-A1 · May 25, 2023 · US
Hydrogen release and storage system, hydrogen release and storage method, ammonia production apparatus, gas turbine, fuel cell, and steel mill
US-2023141693-A1 · May 11, 2023 · US
Evaluation method for residual hydrocarbon of post- to over-mature marine source rocks
US-11499957-B1 · Nov 15, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21B2100/66?
- CPC C21B2100/66 is the Cooperative Patent Classification code for “Heat exchange.”
- How many patents are filed under CPC C21B2100/66 (Heat exchange)?
- Our database includes 74 publications tagged with this CPC code.
- Is patent activity under CPC C21B2100/66 growing?
- Publication counts under this code: 13 in 2024 vs 8 in 2025 (latest complete years).