- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds thereof
- C01B 17/69 - Sulfur trioxide; Sulfuric acid
Patent holdings for IPC class C01B 17/69
Total number of patents in this class: 80
10-year publication summary
|
4
|
2
|
9
|
9
|
7
|
2
|
11
|
10
|
4
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| SixRing Inc. | 121 |
15 |
| Chemetics Inc. | 59 |
5 |
| Metso Metals Oy | 205 |
5 |
| MECS, Inc. | 80 |
4 |
| BASF SE | 19740 |
2 |
| E. I. du Pont de Nemours and Company | 4345 |
2 |
| Chevron Phillips Chemical Company LP | 1779 |
2 |
| Fluid Energy Group Ltd. | 70 |
2 |
| Nemaska Lithium Inc. | 69 |
2 |
| Outotec Oyj | 318 |
2 |
| Silicon Fire AG | 20 |
2 |
| Heritage Research Group, LLC | 48 |
2 |
| Messer Industries USA, Inc. | 103 |
2 |
| Hugo Petersen GmbH | 6 |
2 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 36809 |
1 |
| Thermo Fisher Scientific Inc. | 207 |
1 |
| W. L. Gore & Associates, Inc. | 2600 |
1 |
| BHP Billiton SSM Development Pty Ltd. | 30 |
1 |
| Cppe Carbon Process & Plant Engineering S.A. | 25 |
1 |
| de Dietrich Process Systems GmbH | 20 |
1 |
| Other owners | 25 |