- 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 1/667 - Quenching devices for spray quenching
Patent holdings for IPC class C21D 1/667
Total number of patents in this class: 311
10-year publication summary
|
27
|
39
|
36
|
39
|
33
|
24
|
18
|
11
|
16
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 6557 |
20 |
| Nippon Steel Corporation | 6012 |
16 |
| Fives Stein | 99 |
13 |
| IHI Corporation | 3359 |
13 |
| ArcelorMittal | 2064 |
12 |
| SMS Group GmbH | 1080 |
12 |
| Schwartz GmbH | 58 |
11 |
| IHI Machinery and Furnace Co., Ltd. | 78 |
10 |
| Neturen Co., Ltd. | 194 |
8 |
| Voestalpine Stahl GmbH | 344 |
7 |
| Cockerill Maintenance & Ingenierie SA | 82 |
6 |
| Baoshan Iron & Steel Co., Ltd. | 897 |
5 |
| Consolidated Engineering Company, Inc. | 27 |
5 |
| Primetals Technologies Austria GmbH | 512 |
5 |
| Thermatool Corp. | 47 |
5 |
| NTN Corporation | 4976 |
4 |
| SMS Elotherm GmbH | 16 |
4 |
| ArcelorMittal France | 102 |
3 |
| ArcelorMittal Investigacion y Desarrollo SL | 209 |
3 |
| Danieli & C. Officine Meccaniche S.p.A. | 705 |
3 |
| Other owners | 146 |