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 1/32: General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (furnaces in general F27; electric heating H05B) Methods of annealing Soft annealing, e.g. spheroidising
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12264379 | Steel wire rod having excellent spheroidizing heat treatment properties and method of manufacturing same | Dec 20, 19 | Apr 01, 25 | POSCO |
| 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; |
| 11731180 | Rotary mold extrusion molding process of screw pump rotor | Jan 06, 22 | Aug 22, 23 | Zhejiang Ocean University |
| 11591678 | Stainless steel | Oct 04, 18 | Feb 28, 23 | Uddeholms AB |
| 11578383 | Method for manufacturing high-carbon bearing steel and high-carbon bearing steel manufactured therefrom | Nov 10, 21 | Feb 14, 23 | Hyundai Motor Company; KIA CORPORATION; |
| 11332817 | Machine component | May 10, 19 | May 17, 22 | Komatsu Ltd. |
| 11326220 | Method for producing machine component | May 10, 19 | May 10, 22 | Komatsu Ltd. |
| 11319621 | Steel for mold, and mold | Mar 29, 19 | May 03, 22 | Daido Steel Co. LTD |
| 11198920 | Method for manufacturing high-carbon bearing steel and high-carbon bearing steel manufactured therefrom | Nov 22, 19 | Dec 14, 21 | Hyundai Motor Company; Kia Motors Corporation; HYUNDAI STEEL COMPANY; |
| 11168387 | Steel material for carburized bearing part | Aug 24, 18 | Nov 09, 21 | Nippon Steel Corporation; JTEKT Corporation; |
| 11085097 | Self-lubricating rolling bearing and preparation method therefor | Aug 31, 17 | Aug 10, 21 | XI'AN UNIVERSITY OF TECHNOLOGY |
| 11008634 | Tool steel having strength and high impact toughness | Oct 30, 18 | May 18, 21 | KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY |
| 10988823 | Annealed steel material and method for manufacturing the same | Mar 26, 18 | Apr 27, 21 | Daido Steel Co. LTD |
| 10967609 | Clad material | Mar 20, 18 | Apr 06, 21 | Hitachi Metals LTD |
| 10953630 | Method for manufacturing clad material | Oct 10, 18 | Mar 23, 21 | Hitachi Metals LTD |
| 10941456 | Steel sheet for can and method for manufacturing the same | Feb 02, 17 | Mar 09, 21 | JFE Steel Corporation |
| 10934609 | Steel sheet for carburizing, and method for manufacturing steel sheet for carburizing | Aug 30, 18 | Mar 02, 21 | 501 Nippon Steel Corporation |
| 10851445 | Layered construction of in-situ metal matrix composites | Nov 02, 16 | Dec 01, 20 | The NanoSteel company Inc. |
| 10704125 | Free-machining powder metallurgy steel articles and method of making same | Nov 09, 16 | Jul 07, 20 | CRS Holdings Inc. |
| 10533242 | Steel for cold forging | Jun 13, 14 | Jan 14, 20 | 501 Nippon Steel Corporation |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0010,434 | STEEL, PROCESSING METHOD THEREOF AND SCREWDRIVER BIT | May 28, 24 | Jan 09, 25 | Not available |
| 2025/0003,038 | COLD FORGING WIRE ROD AND STEEL PART HAVING IMPROVED DELAYED FRACTURE RESISTANCE, AND METHOD FOR MANUFACTURING SAME | Dec 01, 22 | Jan 02, 25 | POSCO Co., Ltd |
| 2024/0384,382 | STEEL MATERIAL AND MOLD | May 14, 24 | Nov 21, 24 | Not available |
| 2024/0318,276 | COLD FORGED GEAR STEEL AND MANUFACTURING METHOD THEREOF | Mar 02, 22 | Sep 26, 24 | Baoshan Iron & Steel Co., Ltd. |
| 2024/0271,262 | STEEL MATERIAL | Aug 19, 22 | Aug 15, 24 | Not available |
| 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 |
| 2024/0254,609 | AUSTENITIC STAINLESS STEEL AND TUBE | May 26, 22 | Aug 01, 24 | 501 Nippon Steel Corporation |
| 2024/0228,743 | INORGANIC OXIDE POWDER, METHOD FOR PRODUCING SAME, AND RESIN COMPOSITION | May 18, 22 | Jul 11, 24 | Denka Company Limited |
| 2024/0209,469 | STEEL FOR BOLTS, AND MANUFACTURING METHOD THEREFOR | May 25, 22 | Jun 27, 24 | Baoshan Iron & Steel Co., Ltd. |
| 2024/0209,468 | MARTENSITIC STAINLESS STEEL MATERIAL FOR HYDROGEN GAS ENVIRONMENT AND MANUFACTURING METHOD THEREFOR | Dec 13, 23 | Jun 27, 24 | Not available |
| 2024/0175,112 | STEEL WIRE FOR MACHINE STRUCTURAL PARTS AND METHOD FOR MANUFACTURING THE SAME | Mar 22, 22 | May 30, 24 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) |
| 2024/0167,116 | STEEL WIRE FOR MACHINE STRUCTURAL PARTS AND METHOD FOR MANUFACTURING THE SAME | Mar 22, 22 | May 23, 24 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) |
| 2024/0150,861 | COLD-WORKABLE MECHANICAL STRUCTURAL STEEL, AND METHOD FOR MANUFACTURING SAME | Feb 02, 22 | May 09, 24 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) |
| 2024/0076,766 | QT HEAT TREATED HIGH CARBON HOT ROLLED STEEL SHEET, HIGH CARBON COLD ROLLED STEEL SHEET, QT HEAT TREATED HIGH CARBON COLD ROLLED STEEL SHEET, AND MANUFACTURING METHODS THEREOF | Dec 10, 21 | Mar 07, 24 | POSCO Co., Ltd |
| 2024/0068,078 | Die steel with a high thermal diffusion coefficient and its preparation methods | Mar 09, 22 | Feb 29, 24 | Not available |
| 2024/0018,621 | HIGH TOUGHNESS HIGH CARBON COLD ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY, AND METHOD FOR MANUFACTURING SAME | Dec 10, 21 | Jan 18, 24 | POSCO Co., Ltd |
| 2024/0011,135 | HOT WORK TOOL STEEL | Jun 11, 21 | Jan 11, 24 | Not available |
| 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; |
| 2022/0033,920 | WIRE ROD OF WHICH SOFTENING HEAT TREATMENT CAN BE OMITTED, AND MANUFACTURING METHOD THEREFOR | Dec 13, 19 | Feb 03, 22 | Not available |
| 2020/0181,744 | STEEL SHEET FOR CARBURIZING, AND METHOD FOR MANUFACTURING STEEL SHEET FOR CARBURIZING | Aug 30, 18 | Jun 11, 20 | 501 Nippon Steel Corporation |
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