- 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 1/76 - Adjusting the composition of the atmosphere
Patent holdings for IPC class C21D 1/76
Total number of patents in this class: 407
10-year publication summary
28
|
34
|
20
|
43
|
36
|
31
|
23
|
26
|
29
|
15
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
JFE Steel Corporation | 6067 |
70 |
ArcelorMittal | 1887 |
42 |
Nippon Steel Corporation | 5649 |
24 |
NTN Corporation | 5008 |
16 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
14 |
ThyssenKrupp Steel Europe AG | 924 |
14 |
ThyssenKrupp AG | 3086 |
10 |
Baoshan Iron & Steel Co., Ltd. | 832 |
7 |
Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
7 |
Kanto Yakin Kogyo Co., Ltd. | 16 |
7 |
PARKER NETSUSHORI KOGYO Co., Ltd. | 33 |
7 |
Robert Bosch GmbH | 40953 |
6 |
AK Steel Properties, Inc. | 75 |
6 |
Honda Motor Co., Ltd. | 24537 |
5 |
Hitachi, Ltd. | 16452 |
5 |
Dowa Thermotech Co., Ltd. | 41 |
5 |
IHI Corporation | 3268 |
5 |
L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3515 |
5 |
Linde Aktiengesellschaft | 1600 |
5 |
Nippon Steel & Sumikin Stainless Steel Corporation | 171 |
5 |
Other owners | 142 |