- All sections
- C - Chemistrymetallurgy
- C07D - Heterocyclic compounds
- C07D 213/20 - Quaternary compounds thereof
Patent holdings for IPC class C07D 213/20
Total number of patents in this class: 121
10-year publication summary
|
8
|
8
|
9
|
4
|
6
|
6
|
7
|
6
|
4
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bromine Compounds Ltd. | 188 |
8 |
| Covestro Deutschland AG | 2784 |
4 |
| Mesosil Inc. | 9 |
4 |
| The Hong Kong University of Science and Technology | 774 |
3 |
| Universite Grenoble Alpes | 748 |
3 |
| University of Massachusetts | 2255 |
3 |
| E. I. du Pont de Nemours and Company | 3935 |
2 |
| Merck Patent GmbH | 5777 |
2 |
| Sabic Innovative Plastics IP B.V. | 681 |
2 |
| Chevron U.S.A. Inc. | 4011 |
2 |
| Aramco Services Company | 4068 |
2 |
| Board of Trustees of Michigan State University | 1205 |
2 |
| INVISTA Technologies S.a.r.l. | 410 |
2 |
| The Lubrizol Corporation | 1289 |
2 |
| Saudi Arabian Oil Company | 13540 |
2 |
| Trioptotec GmbH | 17 |
2 |
| Centre National de La Recherche Scientifique (cnrs) | 3098 |
2 |
| London Pharmaceuticals and Research Corporation | 25 |
2 |
| The Procter & Gamble Company | 21989 |
1 |
| L'OREAL, Société Anonyme | 15782 |
1 |
| Other owners | 70 |