- All sections
- C - Chemistry; metallurgy
- C01C - Ammonia; cyanogen; compounds thereof
- C01C 1/04 - Preparation of ammonia by synthesis
Patent holdings for IPC class C01C 1/04
Total number of patents in this class: 966
10-year publication summary
|
52
|
67
|
69
|
91
|
92
|
75
|
86
|
100
|
121
|
38
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Casale SA | 572 |
105 |
| Topsoe A/S | 732 |
62 |
| ThyssenKrupp AG | 3086 |
54 |
| ThyssenKrupp Industrial Solutions AG | 729 |
41 |
| Japan Science and Technology Agency | 1564 |
37 |
| Tokyo Institute of Technology | 1367 |
35 |
| Haldor Topsøe A/S | 698 |
35 |
| Kellogg Brown & Root LLC | 489 |
20 |
| Johnson Matthey Public Limited Company | 1852 |
18 |
| Yara International ASA | 753 |
13 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
12 |
| The University of Tokyo | 3903 |
12 |
| Ammonia Casale S.A. | 23 |
11 |
| Tsubame Bhb Co., Ltd. | 11 |
11 |
| Praxair Technology, Inc. | 1367 |
10 |
| ThyssenKrupp Uhde GmbH | 211 |
10 |
| Nissan Chemical Corporation | 1725 |
10 |
| Starfire Energy | 19 |
10 |
| Siemens AG | 24990 |
9 |
| JNC Corporation | 1527 |
9 |
| Other owners | 442 |