- 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 8/10 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
Patent holdings for IPC class C21D 8/10
Total number of patents in this class: 746
10-year publication summary
|
53
|
67
|
62
|
90
|
78
|
49
|
65
|
57
|
55
|
22
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6067 |
200 |
| Nippon Steel Corporation | 5649 |
166 |
| Nippon Steel & Sumitomo Metal Corporation | 1990 |
44 |
| Sumitomo Metal Industries, Ltd. | 453 |
38 |
| Baoshan Iron & Steel Co., Ltd. | 832 |
31 |
| Salzgitter Flachstahl GmbH | 155 |
11 |
| Tenaris Connections B.V. | 171 |
10 |
| Vallourec Deutschland GmbH | 52 |
9 |
| Sandvik Intellectual Property AB | 1634 |
7 |
| Tenaris Coiled Tubes, LLC | 21 |
7 |
| DALMINE S.p.A. | 22 |
6 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
6 |
| POSCO Co., Ltd. | 1059 |
6 |
| American Axle & Manufacturing, Inc. | 649 |
5 |
| NHK Spring Co., Ltd. | 1657 |
5 |
| Sandvik Materials Technology Deutschland GmbH | 60 |
5 |
| NIPPON STEEL Stainless Steel Corporation | 254 |
5 |
| LG Electronics Inc. | 69257 |
4 |
| Physical Systems, Inc. | 43 |
4 |
| AB Sandvik Materials Technology, | 30 |
4 |
| Other owners | 173 |