- 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 1/58 - Oils
Patent holdings for IPC class C21D 1/58
Total number of patents in this class: 96
10-year publication summary
|
14
|
8
|
12
|
5
|
10
|
8
|
5
|
6
|
5
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Idemitsu Kosan Co., Ltd. | 4224 |
23 |
| Caterpillar Inc. | 10058 |
3 |
| Nanjing Kerun Industrial Technology Co., Ltd | 14 |
3 |
| CRS Holdings, LLC | 149 |
3 |
| Ford Motor Company | 2683 |
2 |
| GM Global Technology Operations LLC | 15722 |
2 |
| Aktiebolaget SKF | 3062 |
2 |
| Baoshan Iron & Steel Co., Ltd. | 1070 |
2 |
| Furukawa Rock Drill Co., Ltd. | 38 |
2 |
| Goodrich Corporation | 2178 |
2 |
| POSCO Co., Ltd. | 1650 |
2 |
| Nanjing Kerun Industrial Media Co., Ltd | 9 |
2 |
| Nanjing Kerun New Material Technology Co., Ltd | 8 |
2 |
| Honda Motor Co., Ltd. | 25840 |
1 |
| Hyundai Motor Company | 23479 |
1 |
| California Institute of Technology | 4015 |
1 |
| Aisin AW Co., Ltd. | 2276 |
1 |
| Schaeffler Technologies AG & Co. KG | 10644 |
1 |
| NSK Ltd. | 2820 |
1 |
| Northwestern University | 3512 |
1 |
| Other owners | 39 |