- All sections
- C - Chemistrymetallurgy
- C07F - Acyclic, carbocyclic, or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium
- C07F 7/21 - Cyclic compounds having at least one ring containing silicon but no carbon in the ring
Patent holdings for IPC class C07F 7/21
Total number of patents in this class: 361
10-year publication summary
|
40
|
29
|
24
|
26
|
17
|
17
|
14
|
13
|
22
|
20
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| National Institute of Advanced Industrial Science and Technology | 3801 |
15 |
| Shin-Etsu Chemical Co., Ltd. | 5708 |
13 |
| Wacker Chemie AG | 2111 |
12 |
| Versum Materials US, LLC | 651 |
11 |
| Henkel AG & Co. KGaA | 10623 |
10 |
| Milliken & Company | 1185 |
10 |
| Evonik Operations GmbH | 4178 |
9 |
| Kureha Corporation | 1040 |
8 |
| Dow Silicones Corporation | 1961 |
8 |
| Kaneka Corporation | 4610 |
7 |
| The United States of America as represented by the Secretary of the Air Force | 859 |
7 |
| Daikin Industries, Ltd. | 10111 |
6 |
| Agency for Science, Technology and Research | 3659 |
6 |
| Gelest, Inc. | 150 |
6 |
| Central Glass Company, Limited | 1274 |
5 |
| JNC Corporation | 1503 |
5 |
| NBD Nanotechnologies, Inc. | 14 |
5 |
| Nippon Soda Co., Ltd. | 892 |
5 |
| Sumitomo Seika Chemicals Co., Ltd. | 1054 |
5 |
| Agc, Inc. | 4944 |
5 |
| Other owners | 203 |