- 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 1/667 - Quenching devices for spray quenching
Patent holdings for IPC class C21D 1/667
Total number of patents in this class: 306
10-year publication summary
23
|
27
|
39
|
36
|
39
|
33
|
24
|
18
|
11
|
6
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
JFE Steel Corporation | 6067 |
17 |
Nippon Steel Corporation | 5649 |
16 |
IHI Corporation | 3268 |
13 |
ArcelorMittal | 1887 |
12 |
Fives Stein | 96 |
12 |
Schwartz GmbH | 58 |
12 |
SMS Group GmbH | 1029 |
11 |
IHI Machinery and Furnace Co., Ltd. | 79 |
10 |
Neturen Co., Ltd. | 193 |
7 |
Voestalpine Stahl GmbH | 311 |
7 |
Cockerill Maintenance & Ingenierie SA | 82 |
6 |
Baoshan Iron & Steel Co., Ltd. | 832 |
5 |
Consolidated Engineering Company, Inc. | 33 |
5 |
Primetals Technologies Austria GmbH | 479 |
5 |
Thermatool Corp. | 45 |
5 |
NTN Corporation | 5008 |
4 |
SMS Elotherm GmbH | 16 |
4 |
ArcelorMittal France | 102 |
3 |
ArcelorMittal Investigacion y Desarrollo SL | 209 |
3 |
Danieli & C. Officine Meccaniche S.p.A. | 680 |
3 |
Other owners | 146 |