- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 303/20 - 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 by addition of sulfurous acid or salts thereof to compounds having carbon-to-carbon multiple bonds
Patent holdings for IPC class C07C 303/20
Total number of patents in this class: 21
10-year publication summary
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1
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1
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2
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1
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1
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0
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3
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2
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1
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1
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kao Corporation | 4959 |
3 |
| University of Kansas | 871 |
3 |
| Dow Global Technologies LLC | 10373 |
2 |
| S.p.c.m. SA | 240 |
2 |
| LG Chem, Ltd. | 17598 |
1 |
| Uop LLC | 4239 |
1 |
| University of South Florida | 1817 |
1 |
| Nippon Shokubai Co., Ltd. | 1508 |
1 |
| Royal College of Surgeons in Ireland | 111 |
1 |
| Stepan Company | 574 |
1 |
| Qingdao University of Science & Technology | 28 |
1 |
| Science Laboratories, Inc. | 1 |
1 |
| LG Energy Solution, Ltd. | 14807 |
1 |
| Shandong Dynamic Fine Chemical Co., Ltd. | 1 |
1 |
| ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company | 181 |
1 |
| Other owners | 0 |