- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 303/22 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof from sulfonic acids by reactions not involving the formation of sulfo or halosulfonyl groups
Patent holdings for IPC class C07C 303/22
Total number of patents in this class: 239
10-year publication summary
|
16
|
15
|
19
|
29
|
16
|
26
|
18
|
11
|
15
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Vitaworks IP, LLC | 55 |
11 |
| Conopco, Inc. | 4808 |
9 |
| Mitsubishi Materials Electronic Chemicals Co., Ltd. | 129 |
7 |
| Agc, Inc. | 4470 |
7 |
| Mylan Institutional LLC | 8 |
7 |
| Mitsubishi Materials Corporation | 2406 |
6 |
| Unilever PLC | 3328 |
5 |
| Unilever N.V. | 3224 |
5 |
| Central Glass Company, Limited | 1246 |
5 |
| King Faisal University | 838 |
5 |
| Qianjiang Yongan Pharmaceutical Co., Ltd | 10 |
5 |
| Hubei Grand Life Science and Technology Co., Ltd | 9 |
5 |
| BASF SE | 20432 |
4 |
| Asahi Glass Company, Limited | 2882 |
4 |
| Tokyo Ohka Kogyo Co., Ltd. | 1508 |
4 |
| China Petroleum & Chemical Corporation | 1783 |
3 |
| FutureFuel Chemical Company | 17 |
3 |
| Geistlich Pharma AG | 167 |
3 |
| Journey Medical Corporation | 93 |
3 |
| Rhodia Operations | 1589 |
3 |
| Other owners | 135 |