- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds thereof
- C01B 17/88 - Concentration of sulfuric acid
Patent holdings for IPC class C01B 17/88
Total number of patents in this class: 38
10-year publication summary
|
1
|
1
|
1
|
2
|
1
|
5
|
3
|
5
|
8
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Topsoe A/S | 732 |
4 |
| Outotec Oyj | 318 |
3 |
| Haldor Topsøe A/S | 698 |
3 |
| BASF SE | 19740 |
2 |
| Bayer MaterialScience AG | 874 |
2 |
| Asia Union Electronic Chemical Corporation | 6 |
2 |
| Teijin Aramid B.V. | 182 |
2 |
| Plinke GmbH | 17 |
2 |
| DuPont Safety & Construction, Inc. | 676 |
2 |
| Covestro Intellectual Property GmbH & Co. KG | 501 |
2 |
| Bayer Intellectual Property GmbH | 2671 |
1 |
| NGK Insulators, Ltd. | 4589 |
1 |
| Aqua Metals, Inc. | 39 |
1 |
| H R D Corporation | 87 |
1 |
| Outotec (Finland) Oy | 491 |
1 |
| Solvay SA | 1181 |
1 |
| Sulzer Management AG | 613 |
1 |
| Bertrams Chemieanlagen AG | 10 |
1 |
| Xi'an Thermal Power Research Institute Co., Ltd. | 244 |
1 |
| Nantong Star Graphite Equipment Co., Ltd. | 2 |
1 |
| Other owners | 4 |