- 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: 113
10-year publication summary
|
5
|
6
|
9
|
6
|
7
|
10
|
13
|
22
|
10
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Yara International ASA | 822 |
30 |
| Casale SA | 595 |
17 |
| ThyssenKrupp Uhde GmbH | 319 |
14 |
| ThyssenKrupp AG | 3242 |
9 |
| BASF SE | 20675 |
8 |
| ThyssenKrupp Industrial Solutions AG | 637 |
8 |
| Eagle View Technologies, Inc. | 126 |
3 |
| Uhde GmbH | 140 |
3 |
| Johnson Matthey Public Limited Company | 1860 |
2 |
| Stamicarbon B.V. | 235 |
2 |
| ThyssenKrupp Industrial Solutions GmbH | 7 |
2 |
| The Alloy Engineering Company | 3 |
2 |
| Altmerge, LLC | 9 |
1 |
| Bedfont Scientific Ltd | 37 |
1 |
| Deepak Nitrite Limited | 24 |
1 |
| Ecocat Oy | 12 |
1 |
| Heraeus Deutschland GmbH & Co. KG | 421 |
1 |
| Messer Group GmbH | 55 |
1 |
| Sued-Chemie Catalysts Italia S.R.L. | 5 |
1 |
| Umicore AG & Co. KG | 854 |
1 |
| Other owners | 5 |