- All sections
- C - Chemistrymetallurgy
- 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: 492
10-year publication summary
|
22
|
25
|
20
|
39
|
27
|
31
|
31
|
31
|
39
|
18
|
| 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 | 5675 |
22 |
| Nihon Medi-physics Co., Ltd. | 180 |
17 |
| Bayer Pharma AG | 1053 |
16 |
| Novartis AG | 10744 |
13 |
| Kyungpook National University Industry-Academic Cooperation Foundation | 1143 |
13 |
| Provincial Health Services Authority | 185 |
10 |
| GE Healthcare AS | 224 |
9 |
| Guerbet | 202 |
8 |
| Bayer Intellectual Property GmbH | 2498 |
7 |
| Enzychem Lifesciences Corporation | 64 |
7 |
| Massachusetts Institute of Technology | 10062 |
6 |
| The Governing Council of The University of Toronto, | 1474 |
6 |
| Kyoto University | 2801 |
6 |
| Universite de Bretagne Occidentale | 109 |
6 |
| The University of British Columbia | 1495 |
6 |
| Fusion Pharmaceuticals Inc. | 86 |
6 |
| Centre National de La Recherche Scientifique | 10464 |
5 |
| JFE Engineering Corporation | 102 |
5 |
| Memorial Sloan-Kettering Cancer Center | 1931 |
5 |
| Other owners | 292 |