- 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: 183
10-year publication summary
|
11
|
17
|
10
|
19
|
12
|
12
|
10
|
8
|
7
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Libre Holdings, Inc. | 45 |
29 |
| Mitsubishi Materials Electronic Chemicals Co., Ltd. | 143 |
7 |
| Vitaworks IP, LLC | 18 |
7 |
| Mylan Institutional LLC | 8 |
7 |
| Central Glass Company, Limited | 1298 |
6 |
| Mitsubishi Materials Corporation | 2485 |
6 |
| Archer Daniels Midland Company | 1071 |
5 |
| Qianjiang Yongan Pharmaceutical Co., Ltd | 11 |
5 |
| S.p.c.m. SA | 235 |
5 |
| The Procter & Gamble Company | 21890 |
4 |
| Rhodia Operations | 1477 |
4 |
| Halliburton Energy Services, Inc. | 21300 |
3 |
| BASF SE | 21334 |
2 |
| Board of Regents, The University of Texas System | 6206 |
2 |
| Chiron AS | 13 |
2 |
| Council of Scientific & Industrial Research | 1452 |
2 |
| Hunan ASTAR Bio-chemical Technology Co., Ltd. | 2 |
2 |
| Innospec Active Chemicals LLC | 24 |
2 |
| Solvay Specialty Polymers USA, LLC | 503 |
2 |
| Sumitomo Seika Chemicals Co., Ltd. | 1060 |
2 |
| Other owners | 79 |