- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds 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: 165
10-year publication summary
|
7
|
2
|
7
|
6
|
8
|
4
|
7
|
5
|
8
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sumitomo Chemical Company, Limited | 8808 |
36 |
| BASF SE | 19740 |
24 |
| Bayer MaterialScience AG | 874 |
24 |
| Bayer Technology Services GmbH | 199 |
14 |
| Covestro Deutschland AG | 2429 |
12 |
| Mitsui Chemicals, Inc. | 3134 |
8 |
| Hanwha Solutions Corporation | 572 |
8 |
| Bayer Intellectual Property GmbH | 2671 |
6 |
| Wanhua Chemical Group Co., Ltd. | 286 |
6 |
| Covestro Intellectual Property GmbH & Co. KG | 501 |
3 |
| BASF AG | 1258 |
2 |
| Kronos International, Inc. | 105 |
2 |
| Wanhua Chemical (Ningbo) Co., Ltd. | 76 |
2 |
| Xi'an Modern Chemistry Research Institute | 26 |
2 |
| University of California, Oakland | 2 |
2 |
| Siemens AG | 24990 |
1 |
| Dow Global Technologies LLC | 10147 |
1 |
| Mitsui Chemicals Polyurethanes, Inc. | 27 |
1 |
| Akzo Nobel Chemicals International B.V. | 520 |
1 |
| Fluor Technologies Corporation | 410 |
1 |
| Other owners | 9 |