- 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: 90
10-year publication summary
|
19
|
16
|
8
|
12
|
5
|
10
|
7
|
5
|
6
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Idemitsu Kosan Co., Ltd. | 4208 |
19 |
| Caterpillar Inc. | 9527 |
3 |
| Nanjing Kerun Industrial Technology Co., Ltd | 14 |
3 |
| CRS Holdings, LLC | 155 |
3 |
| Ford Motor Company | 2709 |
2 |
| GM Global Technology Operations LLC | 14937 |
2 |
| Baoshan Iron & Steel Co., Ltd. | 959 |
2 |
| Furukawa Rock Drill Co., Ltd. | 36 |
2 |
| POSCO Co., Ltd. | 1558 |
2 |
| Nanjing Kerun Industrial Media Co., Ltd | 9 |
2 |
| Nanjing Kerun New Material Technology Co., Ltd | 8 |
2 |
| Honda Motor Co., Ltd. | 25166 |
1 |
| Hyundai Motor Company | 21852 |
1 |
| California Institute of Technology | 3973 |
1 |
| Aisin AW Co., Ltd. | 2333 |
1 |
| Schaeffler Technologies AG & Co. KG | 9807 |
1 |
| NSK Ltd. | 2771 |
1 |
| Northwestern University | 3374 |
1 |
| Aktiebolaget SKF | 2934 |
1 |
| Applied Nano Surfaces Sweden AB | 7 |
1 |
| Other owners | 39 |