- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 21/40 - Preparation by absorption of oxides of nitrogen
Patent holdings for IPC class C01B 21/40
Total number of patents in this class: 94
10-year publication summary
|
2
|
2
|
6
|
5
|
10
|
8
|
4
|
16
|
7
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Yara International ASA | 859 |
14 |
| Casale SA | 611 |
11 |
| ThyssenKrupp Uhde GmbH | 330 |
9 |
| Stamicarbon B.V. | 294 |
8 |
| ThyssenKrupp AG | 3287 |
5 |
| ThyssenKrupp Industrial Solutions AG | 631 |
4 |
| N2 Applied AS | 13 |
3 |
| The University of Sydney | 598 |
3 |
| BASF SE | 20915 |
2 |
| Gifu University | 132 |
2 |
| Messer Group GmbH | 51 |
2 |
| Sawafuji Electric Co., Ltd. | 62 |
2 |
| JFR Co., Ltd. | 9 |
2 |
| Messer SE & Co. KGaA | 154 |
2 |
| Nitricity Inc. | 20 |
2 |
| Air Products and Chemicals, Inc. | 1424 |
1 |
| Korea Advanced Institute of Science and Technology | 4382 |
1 |
| Altmerge, LLC | 9 |
1 |
| ATI Properties, Inc. | 98 |
1 |
| Audi AG | 7361 |
1 |
| Other owners | 18 |