Description
Class C21B : MANUFACTURE OF IRON OR STEEL
Subclass 3/02: General features in the manufacture of pig-iron (mixers for pig-iron C21C 1/06) by applying additives, e.g. fluxing agents
C21B 3/02
Sub-Class
Stats
- 34 US PATENTS IN FORCE
- 6 US APPLICATIONS PENDING
- 26 Total Patent Owners
- 185 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12173376 | Method of manufacturing iron in a metallurgical vessel | Mar 03, 20 | Dec 24, 24 | TATA STEEL NEDERLAND TECHNOLOGY B.V. |
| 12000011 | System and method for the production of hot briquetted iron (HBI) containing flux and/or carbonaceous material at a direct reduction plant | Jun 17, 22 | Jun 04, 24 | Midrex Technologies Inc. |
| 10704119 | Cokeless sinter blend compositions | May 04, 18 | Jul 07, 20 | Nu-Iron Technology LLC |
| 10190183 | Method for desulfurizing | Apr 20, 17 | Jan 29, 19 | Almamet Gmbh |
| 10100378 | Method to operate a smelt cyclone | Dec 18, 14 | Oct 16, 18 | TATA STEEL NEDERLAND TECHNOLOGY B.V. |
| 9920995 | Sand dispensing system and method of dispensing sand into a metal making furnace | Oct 31, 14 | Mar 20, 18 | Not available |
| 9581387 | Method for iron-making with full oxygen and hydrogen-rich gas and equipment thereof | Feb 13, 15 | Feb 28, 17 | CENTRAL IRON AND STEEL RESEARCH INSTITUTE, SHANDONG COKING GROUP CO., LTD., SHANDONG TIEXIONG METALLURGICAL TECHNOLOGY CO., LTD., |
| 9505076 | Auxiliary shielding gas filter for a welding apparatus | Jan 25, 12 | Nov 29, 16 | ILLINOIS TOOL WORKS INC. |
| 9404165 | Producing of pig iron from iron-containing materials | Aug 22, 13 | Aug 02, 16 | HOFFMAN & SONS TECHNOLOGIES, LLC |
| 9203126 | Method for recovering valuable metals | Aug 12, 14 | Dec 01, 15 | SUMITOMO METAL MINING CO., LTD. |
| 9187791 | Shallow metallurgical wire injection method and related depth control | Jul 02, 13 | Nov 17, 15 | SPECIALTY MINERALS (MICHIGAN) INC. |
| 9023126 | Additive for treating resulphurized steel | Mar 03, 09 | May 05, 15 | Affival |
| 8969236 | Process and catalyst for production of mixed alcohols from synthesis gas | Nov 01, 11 | Mar 03, 15 | THE UNIVERSITY OF WYOMING RESEARCH CORPORATION D/B/A WESTERN RESEARCH INSTITUTE |
| 8900535 | Production of zinc sulphate concentrates from a dilute zinc sulphate solution | Jan 07, 11 | Dec 02, 14 | BARRICK GOLD CORPORATION |
| 8871004 | Methods for agglomerating ores | Aug 02, 10 | Oct 28, 14 | UNIVERSITY OF UTAH |
| 8834747 | Compositions containing tin nanoparticles and methods for use thereof | Mar 03, 11 | Sep 16, 14 | LOCKHEED MARTIN CORPORATION |
| 8728194 | Method for controlling foamed slag in a stainless melt in an electronic arc furnace | Aug 07, 09 | May 20, 14 | SMS SIEMAG AKTIENGESELLSCHAFT |
| 8709128 | Process for production of direct reduced iron | Sep 22, 09 | Apr 29, 14 | LUOSSAVAARA-KIIRUNAVAARA AB |
| 8603215 | Composition of amorphous iron oxide hydroxide, desulfurizer comprising the same, and methods for preparing and regenerating the desulfurizer | Apr 29, 10 | Dec 10, 13 | Beijing Sanju Environmental Protection and New Material Co., Ltd. |
| 8551905 | Metal-carbon compositions | Nov 15, 12 | Oct 08, 13 | Third Millennium Materials, LLC |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0425,941 | GEOTHERMALLY POWERED IRON PRODUCTION SYSTEMS AND METHODS | Jun 23, 23 | Dec 26, 24 | Not available |
| 2023/0257,837 | PROCESS FOR PREPARATION AND USE OF INORGANIC MARKERS FOR SECURITY IDENTIFICATION/MARKING ON EXPLOSIVES, FUSES AND AMMUNITION AFTER DETONATION AND ON FIREARMS AND METAL PROJECTILES, PRODUCTS OBTAINED AND PROCESS OF INSERTING MARKERS ON EXPLOSIVES, FUSES AND AMMUNITION AND ON FIREARMS AND METAL PROJECTILES | Nov 14, 22 | Aug 17, 23 | META - SOLUÇÕES EM SEGURANÇA LTDA. |
| 2023/0082,269 | METHOD FOR IRON MAKING BY CONTINUOUS SMELTING REDUCTION | Feb 02, 21 | Mar 16, 23 | Not available |
| 2020/0199,696 | FOAMY SLAG CONDITIONER COMPOUND | Oct 28, 19 | Jun 25, 20 | Hickman, Williams & Company |
| 2017/0247,772 | Composite Particle For Steel Making and Ore Refining | Sep 25, 15 | Aug 31, 17 | AQUABLOK, LTD. |
| 2017/0211,160 | PULVERIZED COAL FOR PIG-IRON MAKING COMPRISING COW MANURE, AND PIG-IRON PRODUCTION METHOD USING SAME | Mar 11, 15 | Jul 27, 17 | HYUNDAI STEEL COMPANY |
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)