Description
Class C21B : MANUFACTURE OF IRON OR STEEL
Subclass 3/04: General features in the manufacture of pig-iron (mixers for pig-iron C21C 1/06) Recovery of by-products, e.g. slag
C21B 3/04
Sub-Class
Stats
- 46 US PATENTS IN FORCE
- 4 US APPLICATIONS PENDING
- 34 Total Patent Owners
- 269 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12168814 | Processing method | Nov 09, 17 | Dec 17, 24 | SUBARU CORPORATION |
| 11926879 | Method and installation for removing slag from metallurgical melts | Mar 05, 20 | Mar 12, 24 | RIA Cast House Enginering GmbH |
| 11767271 | Porous material and method for preparing the same | Sep 21, 20 | Sep 26, 23 | (6) INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE |
| 10900715 | Slag notch | Apr 14, 16 | Jan 26, 21 | Tata Steel Limited |
| 10604816 | Combined system for producing steel and method for operating the combined system | Dec 11, 14 | Mar 31, 20 | THYSSENKRUPP AG |
| 10526669 | Method and system for forming carbonate from steel slag | Jul 25, 17 | Jan 07, 20 | Doosan Heavy Industries Construction Co., Ltd. |
| 10435760 | Fluxing agent, process of its production, agglomeration mixture and use of slug from secondary metallurgy | Jul 02, 14 | Oct 08, 19 | ECOFER, S.R.O. |
| 10280489 | Direct smelting process | Nov 30, 16 | May 07, 19 | Tata Steel Limited |
| 10023945 | Direct smelting process | May 18, 11 | Jul 17, 18 | Tata Steel Limited |
| 9896635 | Method of enhancing the dry grinding efficiency of petcoke | Jan 13, 15 | Feb 20, 18 | HOLCIM TECHNOLOGY LTD |
| 9664444 | Slag discharge door device for an electric furnace | Aug 30, 11 | May 30, 17 | HYUNDAI STEEL COMPANY |
| 9656924 | Process for producing a zinc sulfate solution, obtained from steelworks powder and respective fertilizer inputs | Apr 30, 14 | May 23, 17 | Not available |
| 9493853 | Cleaning tool for cleaning particles contained in a slurry | Sep 23, 13 | Nov 15, 16 | Not available |
| 9347108 | Advanced technology for iron-chrome alloys production and related plant | Feb 25, 14 | May 24, 16 | Not available |
| 9255302 | Method and device for reducing iron-oxide-containing feedstocks in a high-pressure reducing unit | Jan 11, 13 | Feb 09, 16 | PRIMETALS TECHNOLOGIES AUSTRIA GMBH |
| 9212404 | Preparation method for stainless steel slags and steelworks slags for recovery of metal | Nov 11, 10 | Dec 15, 15 | LOESCHE GMBH |
| 9017596 | Slag removal apparatus and method | Jan 31, 13 | Apr 28, 15 | SIEMENS ENERGY, INC. |
| 8834600 | Extraction process for reactive metal oxides | Jun 11, 04 | Sep 16, 14 | UNIVERSITY OF LEEDS |
| 8753422 | Apparatus for and method of production of iron, semi steel and reducing gases | Dec 09, 11 | Jun 17, 14 | Not available |
| 8709131 | Method and system for the production of direct reduced iron using a synthesis gas with a high carbon monoxide content | Feb 15, 12 | Apr 29, 14 | MIDREX TECHNOLOGIES, INC. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0270,588 | PROCESS FOR TREATMENT OF A SODIUM SULFATE CONTAINING RESIDUE PROCESS STREAM OF A BATTERY MANUFACTURING FACILITY, A BATTERY RECYCLING FACILITY, OR A STEEL PRODUCTION PLANT | May 24, 22 | Aug 15, 24 | Cinis Fertilizer AB |
| 2022/0127,688 | Method and installation for removing slag from metallurgical melts | Mar 05, 20 | Apr 28, 22 | RIA Cast House Engineering GmbH |
| 2019/0256,947 | PROCESSING OF CLINKER CONTAINING POLYMETALLIC RAW MATERIALS | Feb 22, 18 | Aug 22, 19 | Not available |
| 2013/0116,105 | DIRECT SMELTING PROCESS | May 18, 11 | May 09, 13 | TECHNOLOGICAL RESOURCES PTY. LIMITED |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 35 Months (last 2 years Issuances)
- 35 Months (last 5 years Issuances)