- All sections
- C - Chemistry; metallurgy
- C21D - Modifying the physical structure of ferrous metals; general devices for heat treatment of ferrous or non-ferrous metals or alloys; making metal malleable, e.g. by decarburisation or tempering
- C21D 1/00 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
Patent holdings for IPC class C21D 1/00
Total number of patents in this class: 445
10-year publication summary
|
31
|
47
|
41
|
32
|
22
|
28
|
19
|
12
|
26
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
45 |
| IHI Corporation | 3268 |
33 |
| IHI Machinery and Furnace Co., Ltd. | 79 |
26 |
| ArcelorMittal | 1887 |
16 |
| Chugai Ro Co., Ltd. | 124 |
16 |
| Nippon Steel Corporation | 5649 |
13 |
| ArcelorMittal France | 102 |
8 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
8 |
| NTN Corporation | 5008 |
7 |
| Nippon Steel & Sumikin Texeng. Co., Ltd. | 11 |
7 |
| Koyo Thermo Systems Co., Ltd. | 33 |
6 |
| POSCO | 2222 |
6 |
| Showa Manufacturing Co., Ltd. | 9 |
6 |
| Mitsubishi Chemical Corporation | 4313 |
5 |
| General Electric Company | 18133 |
4 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
4 |
| Krosakiharima Corporation | 259 |
4 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
4 |
| Toyo Tanso Co., Ltd. | 227 |
4 |
| Materion Newton Inc. | 66 |
4 |
| Other owners | 219 |