- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds thereof
- C01B 33/18 - Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
Patent holdings for IPC class C01B 33/18
Total number of patents in this class: 1107
10-year publication summary
|
61
|
49
|
68
|
66
|
91
|
79
|
88
|
105
|
117
|
37
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Evonik Operations GmbH | 3879 |
41 |
| Evonik Degussa GmbH | 1574 |
38 |
| Denka Company Limited | 2189 |
38 |
| JGC Catalysts and Chemicals Ltd. | 238 |
31 |
| Tokuyama Corporation | 1248 |
26 |
| Denki Kagaku Kogyo Kabushiki Kaisha | 680 |
18 |
| Wacker Chemie AG | 2091 |
18 |
| Admatechs Company Limited | 64 |
12 |
| AGC Si-Tech Co., Ltd. | 49 |
12 |
| Mitsubishi Materials Corporation | 2378 |
11 |
| Mitsubishi Chemical Corporation | 4313 |
10 |
| The Regents of the University of California | 18943 |
9 |
| Colgate-Palmolive Company | 5325 |
9 |
| Shin-Etsu Chemical Co., Ltd. | 5132 |
9 |
| PPG Industries Ohio, Inc. | 3430 |
9 |
| DIC Corporation | 3597 |
9 |
| Agc, Inc. | 4029 |
9 |
| FUJIFILM Business Innovation Corp. | 7395 |
9 |
| Asahi Glass Company, Limited | 2985 |
8 |
| Nalco Company | 620 |
8 |
| Other owners | 773 |