- All sections
- C - Chemistry; metallurgy
- C07D - Heterocyclic compounds
- C07D 257/02 - Heterocyclic compounds containing rings having four nitrogen atoms as the only ring hetero atoms not condensed with other rings
Patent holdings for IPC class C07D 257/02
Total number of patents in this class: 472
10-year publication summary
|
25
|
32
|
25
|
47
|
30
|
42
|
43
|
32
|
38
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bracco Imaging S.p.A. | 315 |
27 |
| The Johns Hopkins University | 5533 |
20 |
| Bayer Pharma AG | 1085 |
16 |
| Nihon Medi-physics Co., Ltd. | 178 |
16 |
| Novartis AG | 11254 |
14 |
| Kyungpook National University Industry-Academic Cooperation Foundation | 1107 |
12 |
| GE Healthcare AS | 235 |
10 |
| Provincial Health Services Authority | 168 |
9 |
| Guerbet | 194 |
8 |
| Bayer Intellectual Property GmbH | 2569 |
7 |
| Enzychem Lifesciences Corporation | 69 |
7 |
| Massachusetts Institute of Technology | 9913 |
6 |
| The Governing Council of The University of Toronto, | 1424 |
6 |
| Kyoto University | 2778 |
6 |
| Memorial Sloan-Kettering Cancer Center | 1890 |
6 |
| Universite de Bretagne Occidentale | 110 |
6 |
| The University of British Columbia | 1468 |
6 |
| Centre National de La Recherche Scientifique | 10102 |
5 |
| JFE Engineering Corporation | 98 |
5 |
| ST Pharm Co., Ltd. | 75 |
5 |
| Other owners | 275 |