Class C21D : MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
Subclass 1/28: General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (furnaces in general F27; electric heating H05B) Methods of annealing Normalising
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12234524 | Electric resistance welded steel pipe or tube | Oct 18, 22 | Feb 25, 25 | JFE Steel Corporation |
| 12234537 | Medium-carbon boron-containing steel and controlled rolling and controlled cooling method for on-line normalizing treatment | May 11, 22 | Feb 25, 25 | DAYE SPECIAL STEEL CO., LTD. |
| 12227815 | Seamless steel pipe having desirable sulfuric acid dew-point corrosion resistance, and method for manufacturing same | Jun 12, 20 | Feb 18, 25 | JFE Steel Corporation |
| 12090533 | Method for rolling steel sheet and method for manufacturing steel sheet | Dec 26, 19 | Sep 17, 24 | JFE Steel Corporation |
| 12000028 | Rail vehicle axle | Aug 17, 16 | Jun 04, 24 | 501 Nippon Steel Corporation |
| 11946120 | Method for controlling amount of silicon added to ductile cast iron, method for casting ductile cast iron, and cast product | Aug 28, 20 | Apr 02, 24 | TIANRUN INDUSTRY TECHNOLOGY CO., LTD.; Shandong University of Technology; |
| 11767574 | Ultrahigh-strength maraging stainless steel with multiphase strengthening and preparation method thereof | Jul 15, 22 | Sep 26, 23 | Harbin Engineering University |
| 11761050 | High-strength low-carbon bainitic fire-resistant steel and preparation method thereof | Jun 07, 21 | Sep 19, 23 | Central Iron & Steel Research Institute |
| 11702716 | Case hardening steel | Jan 25, 16 | Jul 18, 23 | JFE Steel Corporation |
| 11692251 | Pressure vessel steel sheet having excellent PWHT resistance, and manufacturing method therefor | Dec 07, 17 | Jul 04, 23 | POSCO CO., LTD. |
| 11685981 | Steel compositions having improved anti-coking properties | Feb 25, 22 | Jun 27, 23 | VALLOUREC TUBES FRANCE |
| 11578376 | Steel for pressure vessels having excellent resistance to hydrogen induced cracking and manufacturing method thereof | Dec 15, 17 | Feb 14, 23 | POSCO CO., LTD. |
| 11512361 | Electric resistance welded steel pipe or tube and production method for electric resistance welded steel pipe or tube | Dec 26, 18 | Nov 29, 22 | JFE Steel Corporation; JFE Welded Pipe Manufacturing Co., Ltd.; |
| 11459629 | Method of producing grain-oriented electrical steel sheet | Feb 16, 17 | Oct 04, 22 | JFE Steel Corporation |
| 11434553 | Low cost lean production bainitic steel wheel for rail transit, and manufacturing method therefor | Jul 06, 17 | Sep 06, 22 | MAGANG (GROUP) HOLDING CO., LTD.; MAANSHAN IRON & STEELC O., LTD.; |
| 11345982 | Shaft part | Sep 20, 17 | May 31, 22 | 501 Nippon Steel Corporation |
| 11203793 | Steel pipe for fuel injection pipe and method for producing the same | May 26, 16 | Dec 21, 21 | USUI CO., LTD.; 501 Nippon Steel Corporation; |
| 11180820 | Hot-work die steel and a preparation method thereof | Sep 15, 20 | Nov 23, 21 | University of Science and Technology Beijing |
| 11162162 | Steel with high hardness and excellent toughness | Aug 08, 18 | Nov 02, 21 | Osaka University; Komatsu Ltd.; |
| 11136639 | Bearing steel and manufacturing method therefor | Jun 30, 17 | Oct 05, 21 | ILJIN GLOBAL CO., LTD. |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0336,988 | PLASTIC MOLD STEEL PLATE AND METHOD FOR PRODUCING SAME | Aug 04, 21 | Oct 10, 24 | Not available |
| 2024/0327,964 | STEEL PLATE FOR EVAPORATOR OF ADVANCED NUCLEAR POWER UNIT AND MANUFACTURING METHOD THEREOF | May 10, 22 | Oct 03, 24 | Not available |
| 2024/0318,273 | HIGH-TOUGHNESS ULTRAHIGH-STRENGTH STEEL AND MANUFACTURING METHOD THEREOF | Aug 03, 22 | Sep 26, 24 | Central Iron & Steel Research Institute |
| 2024/0318,289 | HEAT-RESISTANT FERRITIC STEEL | Jul 14, 21 | Sep 26, 24 | 501 Nippon Steel Corporation |
| 2024/0295,001 | ULTRA-THICK STEEL SHEET WITH EXCELLENT STRENGTH AND LOW-TEMPERATURE IMPACT TOUGHNESS AND MANUFACTURING METHOD THEREOF | Oct 13, 21 | Sep 05, 24 | POSCO Co., Ltd |
| 2024/0279,782 | NON-ORIENTED SILICON STEEL AND METHOD FOR PRODUCING THE SAME | Jul 07, 21 | Aug 22, 24 | Not available |
| 2024/0200,161 | HEAT-RESISTANT STEEL FOR STEEL PIPES AND CASTINGS | Jan 20, 21 | Jun 20, 24 | Not available |
| 2022/0403,479 | NORMALIZING HEAT-TREATED STEEL SHEET HAVING GOOD LOW-TEMPERATURE IMPACT TOUGHNESS AND METHOD FOR MANUFACTURING SAME | Nov 27, 20 | Dec 22, 22 | POSCO |
| 2022/0325,390 | METHOD FOR CONTROLLING AMOUNT OF SILICON ADDED TO DUCTILE CAST IRON, METHOD FOR CASTING DUCTILE CAST IRON, AND CAST PRODUCT | Aug 28, 20 | Oct 13, 22 | Tianrun Industry Technology Co., Ltd.; Shandong University of Technology; |
| 2018/0320,737 | METHOD FOR PRODUCING BEARING RING AND METHOD FOR PRODUCING DOUBLE ROW TAPERED ROLLER BEARING | Oct 12, 16 | Nov 08, 18 | Not available |
| 2015/0252,457 | METHOD FOR PRODUCING MOLTEN STEEL HAVING HIGH WEAR RESISTANCE AND STEEL HAVING SAID CHARACTERISTICS | Jul 25, 13 | Sep 10, 15 | COMPAÑÍA ELECTRO METALÚRGICA S.A. |
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