Description
Class C21C : PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
Subclass 5/28: Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel Manufacture of steel in the converter
C21C 5/28
Sub-Class
Stats
- 23 US PATENTS IN FORCE
- 9 US APPLICATIONS PENDING
- 12 Total Patent Owners
- 143 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10781498 | Combined system for producing steel and method for operating the combined system | Dec 11, 14 | Sep 22, 20 | THYSSENKRUPP AG |
| 10713399 | Method of batching and scheduling for steelmaking production with plant-wide process consideration | Nov 14, 16 | Jul 14, 20 | Northeastern University |
| 10697031 | Combined system for producing steel and method for operating the combined system | Dec 11, 14 | Jun 30, 20 | THYSSENKRUPP AG |
| 10697030 | Plant combination for producing steel and method for operating the plant combination | Dec 11, 14 | Jun 30, 20 | THYSSENKRUPP AG |
| 10697032 | Method for generating synthesis gas in conjunction with a smelting works | Dec 11, 14 | Jun 30, 20 | THYSSENKRUPP AG |
| 10604816 | Combined system for producing steel and method for operating the combined system | Dec 11, 14 | Mar 31, 20 | THYSSENKRUPP AG |
| 10359343 | Immersion device for slag sample collection | Sep 12, 17 | Jul 23, 19 | Heraeus Electro-Nite International N.V. |
| 10287652 | Method for recovering calcium-containing solid component from steelmaking slag and recovered solid component | Mar 16, 16 | May 14, 19 | Nisshin Steel Co. Ltd. |
| 9499755 | Composite briquette for steelmaking or ironmaking furnace charge | Aug 29, 14 | Nov 22, 16 | Not available |
| 9187793 | Process for making low and specified hardenability structural steel | Dec 31, 10 | Nov 17, 15 | Not available |
| 9156090 | Method of manufacturing iron-based powder | Sep 15, 11 | Oct 13, 15 | POSCO, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, |
| 8771400 | Method for manufacturing molten iron | May 14, 10 | Jul 08, 14 | ISTC CO., LTD. |
| 8747518 | Method for foamed slag generation of a non-corrosive melt in a converter | Jan 05, 11 | Jun 10, 14 | SMS SIEMAG AKTIENGESELLSCHAFT |
| 8262767 | Method of producing steel for steel pipe excellent in sour-resistance performance | May 09, 11 | Sep 11, 12 | SUMITOMO METAL INDUSTRIES, LTD. |
| 8021599 | Method and installation for producing steel products with optimum surface quality | Feb 13, 09 | Sep 20, 11 | SMS SIEMAG AKTIENGESELLSCHAFT |
| 7998237 | Method and installation for the production of steel products having an optimum surface quality | May 25, 04 | Aug 16, 11 | SMS SIEMAG AKTIENGESELLSCHAFT |
| 7959709 | Method of producing steel for steel pipe excellent in sour-resistance performance | Dec 02, 09 | Jun 14, 11 | SUMITOMO METAL INDUSTRIES, LTD. |
| 7641713 | Method for reducing Cr in metallurgical slags containing Cr | May 18, 05 | Jan 05, 10 | HOLCIM TECHNOLOGY LTD |
| 6197086 | System and method for minimizing slag carryover during the production of steel | Oct 08, 99 | Mar 06, 01 | ISG TECHNOLOGIES, INC. |
| 6129888 | System and method for minimizing slag carryover during the taping of a BOF converter in the production of steel | Aug 20, 99 | Oct 10, 00 | ISG TECHNOLOGIES, INC. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0092,477 | METHOD FOR OPERATING A STEELWORKS | Aug 03, 22 | Mar 20, 25 | Not available |
| 2024/0271,233 | METHOD FOR REFINING MOLTEN IRON | Apr 19, 22 | 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 |
| 2024/0254,577 | SPHEROIDIZING-ANNEALED STEEL FOR BALL SCREW HAVING HIGH STRENGTH AND RESISTANCE TO LOW TEMPERATURES AND MANUFACTURING METHOD THEREOF | Apr 11, 24 | Aug 01, 24 | JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO., LTD |
| 2024/0068,061 | CONVERTER STEELMAKING METHOD | Dec 17, 21 | Feb 29, 24 | JFE Steel Corporation |
| 2024/0011,121 | PRODUCTION METHOD FOR NON-ORIENTED SILICON STEEL AND NON-ORIENTED SILICON STEEL | Aug 04, 21 | Jan 11, 24 | INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN); ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD; JIANGSU SHAGANG GROUP CO., LTD.; |
| 2017/0029,919 | A STEEL REBAR AND A PRODUCTION METHOD THEREOF | Jun 27, 14 | Feb 02, 17 | INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD. |
| 2016/0319,383 | COMBINED SYSTEM FOR PRODUCING STEEL AND METHOD FOR OPERATING THE COMBINED SYSTEM | Dec 11, 14 | Nov 03, 16 | THYSSENKRUPP AG |
| 2016/0312,322 | DEVICE AND METHOD FOR TREATING METALLIC MATERIALS | Dec 16, 14 | Oct 27, 16 | ALD VACUUM TECHNOLOGIES GMBH |
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)