- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 303/02 - 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
Patent holdings for IPC class C07C 303/02
Total number of patents in this class: 181
10-year publication summary
|
13
|
11
|
16
|
10
|
19
|
12
|
11
|
10
|
7
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Vitaworks IP, LLC | 55 |
35 |
| Mylan Institutional LLC | 8 |
7 |
| Central Glass Company, Limited | 1264 |
6 |
| Mitsubishi Materials Corporation | 2449 |
6 |
| Mitsubishi Materials Electronic Chemicals Co., Ltd. | 131 |
6 |
| Archer Daniels Midland Company | 1122 |
5 |
| Qianjiang Yongan Pharmaceutical Co., Ltd | 11 |
5 |
| S.p.c.m. SA | 240 |
5 |
| The Procter & Gamble Company | 22043 |
4 |
| Rhodia Operations | 1587 |
4 |
| Halliburton Energy Services, Inc. | 20911 |
3 |
| Asahi Glass Company, Limited | 2772 |
3 |
| BASF SE | 20940 |
2 |
| Board of Regents, The University of Texas System | 5808 |
2 |
| Council of Scientific & Industrial Research | 1427 |
2 |
| Eras-labo | 4 |
2 |
| Hunan ASTAR Bio-chemical Technology Co., Ltd. | 2 |
2 |
| Innospec Active Chemicals LLC | 21 |
2 |
| Institut National Polytechnique de Grenoble | 29 |
2 |
| Solvay Specialty Polymers USA, LLC | 587 |
2 |
| Other owners | 76 |