- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 303/28 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of esters of sulfonic acids by reaction of hydroxy compounds with sulfonic acids or derivatives thereof
Patent holdings for IPC class C07C 303/28
Total number of patents in this class: 164
10-year publication summary
|
18
|
7
|
17
|
12
|
9
|
11
|
6
|
6
|
14
|
8
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FUJIFILM Corporation | 29843 |
5 |
| Adverio Pharma GmbH | 45 |
5 |
| Daiichi Sankyo Company, Limited | 1876 |
5 |
| Eisai R&D Management Co., Ltd. | 1204 |
5 |
| Bayer Cropscience AG | 1967 |
4 |
| Sumitomo Chemical Company, Limited | 9105 |
4 |
| Life Technologies Corporation | 3351 |
4 |
| GE Healthcare Limited | 654 |
4 |
| Lantheus Medical Imaging, Inc. | 173 |
4 |
| Les Laboratoires Servier | 523 |
4 |
| Vectus Biosystems Limited | 31 |
4 |
| Shin-Etsu Chemical Co., Ltd. | 5807 |
3 |
| Central Glass Company, Limited | 1272 |
3 |
| Mu Ionic Solutions Corporation | 164 |
3 |
| Janssen Pharmaceutica N.V. | 3357 |
2 |
| Mitsubishi Chemical Corporation | 4608 |
2 |
| Avexxin AS | 45 |
2 |
| F.I.S. Fabbrica Italiana Sintetici S.p.A. | 131 |
2 |
| Nihon Medi-physics Co., Ltd. | 175 |
2 |
| Nogra Pharma Limited | 113 |
2 |
| Other owners | 95 |