- 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: 149
10-year publication summary
|
7
|
6
|
8
|
4
|
7
|
5
|
8
|
9
|
3
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Chemical Company, Limited | 9002 |
25 |
| BASF SE | 21337 |
20 |
| Bayer MaterialScience AG | 694 |
13 |
| Bayer Technology Services GmbH | 153 |
13 |
| Mitsui Chemicals, Inc. | 3291 |
11 |
| Covestro Deutschland AG | 2858 |
11 |
| Hanwha Solutions Corporation | 1254 |
9 |
| Wanhua Chemical Group Co., Ltd. | 391 |
7 |
| Bayer Intellectual Property GmbH | 2336 |
6 |
| Kronos International, Inc. | 115 |
3 |
| Covestro Intellectual Property GmbH & Co. KG | 276 |
3 |
| Arkema France | 4243 |
2 |
| Innovator Energy LLC | 80 |
2 |
| Wanhua Chemical (Ningbo) Co., Ltd. | 82 |
2 |
| Xi'an Modern Chemistry Research Institute | 28 |
2 |
| Siemens AG | 23946 |
1 |
| The Regents of the University of California | 21018 |
1 |
| Dow Global Technologies LLC | 11114 |
1 |
| Akzo Nobel Chemicals International B.V. | 411 |
1 |
| Borsodchem Zrt. | 32 |
1 |
| Other owners | 15 |