Description
Class C21B : MANUFACTURE OF IRON OR STEEL
Subclass 5/00: Making pig-iron in the blast furnace
C21B 5/00
Sub-Class
Stats
- 117 US PATENTS IN FORCE
- 58 US APPLICATIONS PENDING
- 44 Total Patent Owners
- 500 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12203835 | Fine ratio measuring method and apparatus | Apr 03, 20 | Jan 21, 25 | JFE Steel Corporation |
| 12195822 | Cooperative emission reduction method for sintering using energy-carrying composite gas medium | Jul 29, 20 | Jan 14, 25 | Central South University; ZHONGYE CHANGTIAN INTERNATIONAL ENGINEERING CO., LTD.; |
| 12180555 | Blast furnace operation method | Feb 17, 20 | Dec 31, 24 | 501 Nippon Steel Corporation; JFE Steel Corporation; Kobe Steel Ltd.; NIPPON STEEL ENGINEERING CO., LTD; |
| 12098436 | Seal gas optimization systems and methods for a direct reduction process | Feb 08, 23 | Sep 24, 24 | Midrex Technologies Inc. |
| 12098437 | Method for charging raw materials into blast furnace | Mar 04, 19 | Sep 24, 24 | JFE Steel Corporation |
| 12084623 | High-carbon biogenic reagents and uses thereof | May 07, 21 | Sep 10, 24 | Carbon Technology Holdings, LLC |
| 12071346 | Fine particle coal, and systems, apparatuses, and methods for collecting and using the same | Oct 19, 20 | Aug 27, 24 | Somerset International, Inc. |
| 12043874 | System and method for reducing ore using hydrogen as a reducing agent | Dec 01, 21 | Jul 23, 24 | Ohmium International, Inc. |
| 11965139 | Systems and apparatus for production of high-carbon biogenic reagents | May 19, 22 | Apr 23, 24 | Carbon Technology Holdings, LLC |
| 11959038 | High-carbon biogenic reagents and uses thereof | Jul 30, 21 | Apr 16, 24 | Carbon Technology Holdings, LLC |
| 11946108 | Foundry coke products and associated processing methods via cupolas | Nov 04, 22 | Apr 02, 24 | SunCoke Technology and Development LLC |
| 11891582 | High-carbon biogenic reagents and uses thereof | Jul 30, 21 | Feb 06, 24 | Carbon Technology Holdings, LLC |
| 11891672 | Surface profile detection apparatus of burden in blast furnace and operation method comprising an angle fixed reflection plate to transmit the detection wave from an antenna to the reflection surface of an angle variable reflection plate | Mar 23, 20 | Feb 06, 24 | WADECO CO., LTD. |
| 11851724 | Foundry coke products, and associated systems, devices, and methods | Nov 04, 22 | Dec 26, 23 | SunCoke Technology and Development LLC |
| 11851723 | Carbon-negative metallurgical products | Feb 17, 22 | Dec 26, 23 | Carbon Technology Holdings, LLC |
| 11851725 | Ironmaking feedstock | Oct 05, 22 | Dec 26, 23 | Swinburne University of Technology; Commonwealth Scientific and Industrial Research Organisation; |
| 11753698 | Bio-reduction of metal ores integrated with biomass pyrolysis | Sep 25, 21 | Sep 12, 23 | Carbon Technology Holdings, LLC |
| 11674101 | Process for producing high-carbon biogenic reagents | Mar 18, 21 | Jun 13, 23 | Carbon Technology Holdings, LLC |
| 11655511 | Seal gas optimization systems and methods for a direct reduction process | Jun 23, 20 | May 23, 23 | Midrex Technologies Inc. |
| 11572597 | P process of making pig iron in a blast furnace using pellets containing thermoplastic and cellulosic materials | Jun 19, 18 | Feb 07, 23 | SUBCOAL INTERNATIONAL B.V. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0101,538 | Gas Injection Control System For Blast Furnace, And Control Method | Dec 13, 22 | Mar 27, 25 | Not available |
| 2025/0092,475 | ESTIMATION METHOD OF DEPOSITIONAL SHAPE OF CHARGED MATERIAL INSIDE BLAST FURNACE AND REPLACEMENT METHOD OF COKE INSIDE BLAST FURNACE | Jul 06, 22 | Mar 20, 25 | JFE Steel Corporation |
| 2025/0084,495 | CARBON-NEGATIVE METALLURGICAL PRODUCTS | Oct 11, 24 | Mar 13, 25 | Not available |
| 2025/0075,141 | PROCESS FOR PRODUCING HIGH-CARBON BIOGENIC REAGENTS | Oct 11, 24 | Mar 06, 25 | Not available |
| 2025/0027,176 | Injection Regulation and Control Device and Method for Blast Furnace Low-Carbon Smelting | Dec 04, 22 | Jan 23, 25 | Not available |
| 2025/0027,177 | FOUNDRY COKE PRODUCTS, AND ASSOCIATED SYSTEMS, DEVICES, AND METHODS | Sep 20, 24 | Jan 23, 25 | Not available |
| 2024/0425,941 | GEOTHERMALLY POWERED IRON PRODUCTION SYSTEMS AND METHODS | Jun 23, 23 | Dec 26, 24 | Not available |
| 2024/0392,397 | HYDROGEN HEATING APPARATUS FOR BLAST FURNACES, HYDROGEN HEATING METHOD FOR BLAST FURNACES, AND BLAST FURNACE OPERATION METHOD | Aug 15, 22 | Nov 28, 24 | CLEAN PLANET Inc. |
| 2024/0375,962 | Method and System for Treating CO2 | Sep 20, 22 | Nov 14, 24 | Not available |
| 2024/0368,731 | Process for the Production of Zinc Oxide Concentrate and Iron Ecosinter from Steelmaking Wastes and Product Obtained by Such Process | Aug 03, 23 | Nov 07, 24 | Not available |
| 2024/0343,985 | SYSTEMS AND APPARATUS FOR PRODUCTION OF HIGH-CARBON BIOGENIC REAGENTS | Apr 02, 24 | Oct 17, 24 | Not available |
| 2024/0336,986 | SYSTEM AND METHOD FOR REDUCING ORE USING HYDROGEN AS A REDUCING AGENT | Jun 18, 24 | Oct 10, 24 | Not available |
| 2024/0294,997 | CARBON-NEGATIVE METALLURGICAL PRODUCTS | Apr 29, 24 | Sep 05, 24 | Not available |
| 2024/0279,756 | PROCESS UTILIZING SYNTHESIS GAS FOR IMPROVING THE ENVIRONMENTAL IMPACT OF THE REDUCTION OF IRON ORE IN BLAST FURNACES | May 02, 22 | Aug 22, 24 | Not available |
| 2024/0271,052 | HIGH-CARBON BIOGENIC REAGENTS AND USES THEREOF | Apr 24, 24 | Aug 15, 24 | Not available |
| 2024/0271,231 | SUPPLY HEAT AMOUNT ESTIMATING METHOD, SUPPLY HEAT AMOUNT ESTIMATING DEVICE, AND BLAST FURNACE OPERATING METHOD | Nov 17, 21 | Aug 15, 24 | JFE Steel Corporation |
| 2024/0271,232 | METHOD FOR PRODUCING STEEL IN AN INTEGRATED METALLURGICAL PLANT | May 11, 22 | Aug 15, 24 | ThyssenKrupp Steel Europe AG |
| 2024/0263,258 | METHOD FOR OPERATING A BLAST FURNACE INSTALLATION | Jun 02, 22 | Aug 08, 24 | Not available |
| 2024/0263,095 | HIGH-CARBON BIOGENIC REAGENTS AND USES THEREOF | Jan 17, 24 | Aug 08, 24 | Not available |
| 2024/0240,274 | PIG IRON-PRODUCING METHOD AND IRON ORE MATERIAL | Jun 21, 21 | Jul 18, 24 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 32 Months (last 2 years Issuances)
- 32 Months (last 5 years Issuances)