- 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: 342
10-year publication summary
29
|
40
|
29
|
24
|
26
|
17
|
17
|
15
|
13
|
7
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
National Institute of Advanced Industrial Science and Technology | 3677 |
13 |
Wacker Chemie AG | 2091 |
12 |
Shin-Etsu Chemical Co., Ltd. | 5132 |
11 |
Henkel AG & Co. KGaA | 10129 |
10 |
Milliken & Company | 1253 |
10 |
Versum Materials US, LLC | 591 |
9 |
Evonik Operations GmbH | 3879 |
8 |
Kaneka Corporation | 4445 |
7 |
The United States of America as represented by the Secretary of the Air Force | 754 |
7 |
Daikin Industries, Ltd. | 9495 |
6 |
Agency for Science, Technology and Research | 3512 |
6 |
Gelest, Inc. | 104 |
6 |
Adeka Corporation | 1333 |
5 |
Central Glass Company, Limited | 1244 |
5 |
JNC Corporation | 1527 |
5 |
NBD Nanotechnologies, Inc. | 17 |
5 |
Nippon Soda Co., Ltd. | 890 |
5 |
Dow Silicones Corporation | 1664 |
5 |
LG Chem, Ltd. | 17205 |
4 |
Dow Corning Corporation | 1072 |
4 |
Other owners | 199 |