- 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 7/20 - Purification; Separation
Patent holdings for IPC class C07F 7/20
Total number of patents in this class: 102
10-year publication summary
8
|
5
|
11
|
13
|
4
|
5
|
7
|
5
|
6
|
7
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Wacker Chemie AG | 2091 |
12 |
Dow Silicones Corporation | 1664 |
9 |
Evonik Operations GmbH | 3879 |
9 |
Momentive Performance Materials Inc. | 861 |
6 |
LG Chem, Ltd. | 17205 |
5 |
Evonik Degussa GmbH | 1574 |
5 |
Dow Corning Corporation | 1072 |
4 |
Alcon, Inc. | 4899 |
4 |
Dow Corning Toray Co., Ltd. | 562 |
3 |
Shin-Etsu Chemical Co., Ltd. | 5132 |
2 |
Central Glass Company, Limited | 1244 |
2 |
Citibank, N.A., AS Administrative Agent | 295 |
2 |
Tokuyama Corporation | 1248 |
2 |
Vitec Speciality Chemicals Limited | 3 |
2 |
Nata Semiconductor Materials Co., Ltd. | 14 |
2 |
Johnson & Johnson Vision Care, Inc. | 1255 |
1 |
F. Hoffmann-La Roche AG | 7958 |
1 |
California Institute of Technology | 3884 |
1 |
Toray Industries, Inc. | 6652 |
1 |
Kaneka Corporation | 4445 |
1 |
Other owners | 28 |