- All sections
- C - Chemistrymetallurgy
- C21D - Modifying the physical structure of ferrous metalsgeneral devices for heat treatment of ferrous or non-ferrous metals or alloysmaking 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: 789
10-year publication summary
|
68
|
62
|
90
|
78
|
49
|
66
|
57
|
58
|
57
|
27
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6816 |
211 |
| Nippon Steel Corporation | 6207 |
187 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
44 |
| Baoshan Iron & Steel Co., Ltd. | 959 |
38 |
| Sumitomo Metal Industries, Ltd. | 383 |
30 |
| Salzgitter Flachstahl GmbH | 158 |
11 |
| POSCO Co., Ltd. | 1559 |
8 |
| Tenaris Coiled Tubes, LLC | 22 |
8 |
| Tenaris Connections B.V. | 167 |
8 |
| Vallourec Deutschland GmbH | 40 |
8 |
| Sandvik Intellectual Property AB | 1484 |
7 |
| DALMINE S.p.A. | 22 |
6 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2876 |
6 |
| American Axle & Manufacturing, Inc. | 653 |
5 |
| Sandvik Materials Technology Deutschland GmbH | 59 |
5 |
| NIPPON STEEL Stainless Steel Corporation | 286 |
5 |
| LG Electronics Inc. | 72807 |
4 |
| NHK Spring Co., Ltd. | 1852 |
4 |
| Physical Systems, Inc. | 40 |
4 |
| Usui Co., Ltd. | 116 |
4 |
| Other owners | 186 |