- 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: 160
10-year publication summary
|
19
|
8
|
17
|
13
|
10
|
11
|
7
|
6
|
14
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Daiichi Sankyo Company, Limited | 1873 |
6 |
| FUJIFILM Corporation | 28841 |
5 |
| Sumitomo Chemical Company, Limited | 8997 |
5 |
| Adverio Pharma GmbH | 44 |
5 |
| Eisai R&D Management Co., Ltd. | 1270 |
5 |
| Bayer Cropscience AG | 2136 |
4 |
| Life Technologies Corporation | 3218 |
4 |
| GE Healthcare Limited | 692 |
4 |
| Les Laboratoires Servier | 595 |
4 |
| Vectus Biosystems Limited | 35 |
4 |
| Shin-Etsu Chemical Co., Ltd. | 5460 |
3 |
| Lantheus Medical Imaging, Inc. | 174 |
3 |
| Mu Ionic Solutions Corporation | 163 |
3 |
| Janssen Pharmaceutica N.V. | 3610 |
2 |
| Mitsubishi Chemical Corporation | 4457 |
2 |
| Avexxin AS | 49 |
2 |
| Central Glass Company, Limited | 1248 |
2 |
| Nihon Medi-physics Co., Ltd. | 179 |
2 |
| Nogra Pharma Limited | 117 |
2 |
| PetroChina Company Limited | 587 |
2 |
| Other owners | 91 |