- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds thereof
- C01B 33/193 - Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates of aqueous solutions of silicates
Patent holdings for IPC class C01B 33/193
Total number of patents in this class: 268
10-year publication summary
|
43
|
5
|
19
|
17
|
14
|
29
|
19
|
14
|
27
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rhodia Operations | 1645 |
81 |
| Evonik Operations GmbH | 3879 |
28 |
| Evonik Degussa GmbH | 1574 |
16 |
| AGC Si-Tech Co., Ltd. | 49 |
12 |
| Agc, Inc. | 4029 |
9 |
| PPG Industries Ohio, Inc. | 3430 |
7 |
| JGC Catalysts and Chemicals Ltd. | 238 |
7 |
| TATA Chemicals Limited | 77 |
6 |
| Tosoh Silica Corporation | 15 |
6 |
| Merck Patent GmbH | 5909 |
4 |
| J.M. Huber Corporation | 155 |
4 |
| Wacker Chemie AG | 2091 |
4 |
| Guangzhou Feixue Material Technology., Ltd. | 10 |
4 |
| Wuxi Hengcheng Silicon Industry Co., Ltd. | 12 |
4 |
| Fuji Chemical Industries Co., Ltd. | 25 |
3 |
| Rhodia Chimie | 144 |
3 |
| BASF SE | 19740 |
2 |
| Bridgestone Corporation | 7067 |
2 |
| Industry Academic Cooperation Foundation Keimyung University | 200 |
2 |
| M. Technique Co., Ltd. | 237 |
2 |
| Other owners | 62 |