- All sections
- A - Human necessities
- A61K - Preparations for medical, dental or toiletry purposes
- A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep
Patent holdings for IPC class A61K 31/551
Total number of patents in this class: 3249
10-year publication summary
|
222
|
284
|
232
|
230
|
258
|
266
|
264
|
232
|
252
|
148
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Boehringer Ingelheim International GmbH | 4656 |
53 |
| Woolsey Pharmaceuticals, Inc. | 78 |
48 |
| Novartis AG | 10847 |
42 |
| Merck Sharp & Dohme LLC | 3750 |
41 |
| Dana-Farber Cancer Institute, Inc. | 2567 |
36 |
| Nippon Chemiphar Co., Ltd. | 228 |
33 |
| Bristol-myers Squibb Company | 4878 |
32 |
| F. Hoffmann-La Roche AG | 7930 |
30 |
| Takeda Pharmaceutical Company Limited | 2714 |
30 |
| GW Research Limited | 194 |
29 |
| Kowa Company, Ltd. | 1195 |
27 |
| Alkermes Pharma Ireland Limited | 269 |
25 |
| The Regents of the University of California | 19898 |
24 |
| Genentech, Inc. | 3971 |
24 |
| Gilead Sciences, Inc. | 2037 |
21 |
| Neurosearch A/S | 185 |
21 |
| Hoffmann-La Roche Inc. | 3414 |
19 |
| Astellas Pharma Inc. | 1085 |
19 |
| Janssen Pharmaceutica N.V. | 3395 |
18 |
| Centre National de La Recherche Scientifique | 10421 |
17 |
| Other owners | 2660 |