- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 7/04 - Preparation of chlorine from hydrogen chloride
Patent holdings for IPC class C01B 7/04
Total number of patents in this class: 163
10-year publication summary
|
2
|
7
|
6
|
8
|
4
|
7
|
5
|
8
|
9
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Chemical Company, Limited | 9047 |
31 |
| BASF SE | 20926 |
24 |
| Bayer MaterialScience AG | 801 |
24 |
| Bayer Technology Services GmbH | 177 |
14 |
| Mitsui Chemicals, Inc. | 3218 |
11 |
| Covestro Deutschland AG | 2747 |
11 |
| Hanwha Solutions Corporation | 818 |
9 |
| Bayer Intellectual Property GmbH | 2500 |
6 |
| Wanhua Chemical Group Co., Ltd. | 352 |
6 |
| Kronos International, Inc. | 111 |
3 |
| Covestro Intellectual Property GmbH & Co. KG | 276 |
3 |
| Wanhua Chemical (Ningbo) Co., Ltd. | 80 |
2 |
| Xi'an Modern Chemistry Research Institute | 28 |
2 |
| Siemens AG | 24505 |
1 |
| The Regents of the University of California | 19898 |
1 |
| BASF AG | 275 |
1 |
| Dow Global Technologies LLC | 10352 |
1 |
| Akzo Nobel Chemicals International B.V. | 432 |
1 |
| Fluor Technologies Corporation | 376 |
1 |
| Hanwha Chemical Corporation | 321 |
1 |
| Other owners | 10 |