- All sections
- C - Chemistrymetallurgy
- C09C - Treatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling propertiespreparation of carbon black
- C09C 1/28 - Compounds of silicon
Patent holdings for IPC class C09C 1/28
Total number of patents in this class: 349
10-year publication summary
|
25
|
21
|
18
|
30
|
16
|
17
|
15
|
28
|
18
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Sheet Glass Company, Limited | 990 |
22 |
| Nissan Chemical Corporation | 2033 |
12 |
| Rhodia Operations | 1587 |
11 |
| 3m Innovative Properties Company | 17823 |
8 |
| Evonik Operations GmbH | 4114 |
7 |
| Evonik Degussa GmbH | 1525 |
5 |
| PPG Industries Ohio, Inc. | 3449 |
5 |
| Fujimi Incorporated | 743 |
5 |
| Wacker Chemie AG | 2111 |
5 |
| Imertech SAS | 230 |
5 |
| Centre National de La Recherche Scientifique | 10464 |
4 |
| Tokuyama Corporation | 1395 |
4 |
| Universite Paul Sabatier Toulouse III | 475 |
4 |
| W.R. Grace & Co.-conn. | 369 |
4 |
| ionobell Inc | 30 |
4 |
| The Goodyear Tire & Rubber Company | 2499 |
3 |
| Agency for Science, Technology and Research | 3628 |
3 |
| Boe Technology Group Co., Ltd. | 41291 |
3 |
| Aspen Aerogels, Inc. | 251 |
3 |
| Cqv Co., Ltd. | 69 |
3 |
| Other owners | 229 |