- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 303/40 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of amides of sulfonic acids by reactions not involving the formation of sulfonamide groups
Patent holdings for IPC class C07C 303/40
Total number of patents in this class: 261
10-year publication summary
|
27
|
24
|
12
|
9
|
13
|
11
|
9
|
14
|
10
|
11
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Soda Co., Ltd. | 886 |
11 |
| Arkema France | 4230 |
10 |
| Centre National de La Recherche Scientifique | 11122 |
6 |
| Bayer Cropscience AG | 1821 |
5 |
| Mitsubishi Materials Electronic Chemicals Co., Ltd. | 143 |
5 |
| Massachusetts Institute of Technology | 10313 |
4 |
| Central Glass Company, Limited | 1297 |
4 |
| Mitsubishi Materials Corporation | 2482 |
4 |
| Nano Safe Coatings Incorporated (a Florida Corporation 3 P 14000024914) | 8 |
4 |
| Takasago International Corporation | 408 |
4 |
| The Trustees of Boston College | 204 |
4 |
| SES Holdings Pte. Ltd | 71 |
4 |
| Kynan Duke IP, LLC | 9 |
4 |
| F. Hoffmann-La Roche AG | 7792 |
3 |
| Evonik Degussa GmbH | 1343 |
3 |
| China Pharmaceutical University | 364 |
3 |
| H. Lee Moffitt Cancer Center and Research Institute, Inc. | 1041 |
3 |
| Hydro-Quebec | 639 |
3 |
| Kyushu University, National University Corporation | 1735 |
3 |
| National University Corporation Nagoya University | 778 |
3 |
| Other owners | 171 |