- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 21/28 - Apparatus
Patent holdings for IPC class C01B 21/28
Total number of patents in this class: 124
10-year publication summary
|
5
|
7
|
5
|
6
|
8
|
9
|
13
|
10
|
7
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Yara International ASA | 880 |
31 |
| ThyssenKrupp Uhde GmbH | 368 |
18 |
| Casale SA | 627 |
15 |
| ThyssenKrupp AG | 3456 |
13 |
| BASF SE | 21147 |
9 |
| ThyssenKrupp Industrial Solutions AG | 631 |
8 |
| Eagle View Technologies, Inc. | 129 |
3 |
| Uhde GmbH | 124 |
3 |
| Deepak Nitrite Limited | 25 |
2 |
| Johnson Matthey Public Limited Company | 1736 |
2 |
| Stamicarbon B.V. | 312 |
2 |
| ThyssenKrupp Industrial Solutions GmbH | 7 |
2 |
| The Alloy Engineering Company | 3 |
2 |
| Messer SE & Co. KGaA | 166 |
2 |
| Altmerge, LLC | 9 |
1 |
| Bedfont Scientific Ltd | 36 |
1 |
| Ceres Power Limited | 46 |
1 |
| Ecocat Oy | 12 |
1 |
| Heraeus Deutschland GmbH & Co. KG | 405 |
1 |
| Messer Group GmbH | 50 |
1 |
| Other owners | 6 |