- All sections
- C - Chemistrymetallurgy
- C01C - Ammoniacyanogencompounds thereof
- C01C 1/04 - Preparation of ammonia by synthesis
Patent holdings for IPC class C01C 1/04
Total number of patents in this class: 1156
10-year publication summary
|
67
|
69
|
91
|
92
|
76
|
87
|
103
|
137
|
144
|
64
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Casale SA | 601 |
113 |
| Topsoe A/S | 872 |
75 |
| ThyssenKrupp AG | 3254 |
60 |
| Japan Science and Technology Agency | 1350 |
37 |
| Tokyo Institute of Technology | 1388 |
36 |
| Haldor Topsøe A/S | 662 |
35 |
| ThyssenKrupp Industrial Solutions AG | 636 |
34 |
| ThyssenKrupp Uhde GmbH | 324 |
30 |
| Kellogg Brown & Root LLC | 519 |
22 |
| Johnson Matthey Public Limited Company | 1857 |
18 |
| Yara International ASA | 831 |
18 |
| The University of Tokyo | 4131 |
16 |
| SABIC Global Technologies B.V. | 4273 |
15 |
| Starfire Energy | 26 |
13 |
| Tsubame Bhb Co., Ltd. | 13 |
13 |
| Linde GmbH | 1253 |
13 |
| Mitsubishi Heavy Industries, Ltd. | 8616 |
12 |
| Nissan Chemical Corporation | 1959 |
11 |
| Siemens AG | 24563 |
10 |
| Praxair Technology, Inc. | 1313 |
10 |
| Other owners | 565 |