- All sections
- C - Chemistry; metallurgy
- 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: 353
10-year publication summary
|
40
|
29
|
24
|
26
|
17
|
17
|
15
|
13
|
21
|
4
|
| 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 | 3736 |
15 |
| Shin-Etsu Chemical Co., Ltd. | 5446 |
12 |
| Wacker Chemie AG | 2106 |
12 |
| Henkel AG & Co. KGaA | 10351 |
10 |
| Milliken & Company | 1219 |
10 |
| Versum Materials US, LLC | 621 |
10 |
| Evonik Operations GmbH | 4021 |
9 |
| Kaneka Corporation | 4498 |
7 |
| The United States of America as represented by the Secretary of the Air Force | 806 |
7 |
| Daikin Industries, Ltd. | 9838 |
6 |
| Agency for Science, Technology and Research | 3561 |
6 |
| Gelest, Inc. | 124 |
6 |
| Kureha Corporation | 1026 |
6 |
| Dow Silicones Corporation | 1808 |
6 |
| Central Glass Company, Limited | 1246 |
5 |
| JNC Corporation | 1532 |
5 |
| NBD Nanotechnologies, Inc. | 16 |
5 |
| Nippon Soda Co., Ltd. | 883 |
5 |
| LG Chem, Ltd. | 17639 |
4 |
| Dow Corning Corporation | 1018 |
4 |
| Other owners | 203 |