- All sections
- C - Chemistry; metallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 303/22 - Preparation of esters or amides of sulfuric acids; Preparation 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: 231
10-year publication summary
|
11
|
16
|
15
|
19
|
29
|
16
|
26
|
18
|
11
|
7
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Vitaworks IP, LLC | 55 |
11 |
| Conopco, Inc. | 4644 |
9 |
| Agc, Inc. | 4029 |
7 |
| Mylan Institutional LLC | 8 |
7 |
| Mitsubishi Materials Corporation | 2378 |
6 |
| Mitsubishi Materials Electronic Chemicals Co., Ltd. | 119 |
6 |
| Unilever PLC | 3540 |
5 |
| Unilever N.V. | 3440 |
5 |
| Central Glass Company, Limited | 1244 |
5 |
| Qianjiang Yongan Pharmaceutical Co., Ltd | 9 |
5 |
| Hubei Grand Life Science and Technology Co., Ltd | 9 |
5 |
| BASF SE | 19740 |
4 |
| Asahi Glass Company, Limited | 2985 |
4 |
| China Petroleum & Chemical Corporation | 1623 |
3 |
| FutureFuel Chemical Company | 16 |
3 |
| Geistlich Pharma AG | 161 |
3 |
| Journey Medical Corporation | 93 |
3 |
| King Faisal University | 409 |
3 |
| Rhodia Operations | 1645 |
3 |
| Shanghai Research Institute of Petrochemical Technology Sinopec | 252 |
3 |
| Other owners | 131 |