- All sections
- C - Chemistrymetallurgy
- C07C - Acyclic or carbocyclic compounds
- C07C 303/06 - 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 substitution of hydrogen atoms by sulfo or halosulfonyl groups by reaction with sulfuric acid or sulfur trioxide
Patent holdings for IPC class C07C 303/06
Total number of patents in this class: 170
10-year publication summary
|
7
|
6
|
12
|
25
|
25
|
19
|
14
|
11
|
6
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| BASF SE | 20874 |
36 |
| Grillo-Werke AG | 27 |
9 |
| Chevron Oronite Company LLC | 571 |
8 |
| ExxonMobil Chemical Patents Inc. | 4016 |
6 |
| Stepan Company | 569 |
6 |
| Sumitomo Seika Chemicals Co., Ltd. | 1033 |
6 |
| Cmblu Energy AG | 52 |
5 |
| Shell Internationale Research Maatschappij B.V. | 3553 |
4 |
| Shell Oil Company | 2141 |
3 |
| Uop LLC | 4240 |
3 |
| CEPSA Quimica, S.A. | 57 |
3 |
| Rhodia Operations | 1587 |
3 |
| SABIC Global Technologies B.V. | 4318 |
3 |
| Solvay Specialty Polymers USA, LLC | 581 |
3 |
| Veolia North America Regeneration Services, LLC | 10 |
3 |
| Provepharm Life Solutions | 63 |
3 |
| Corteva Agriscience LLC | 2662 |
3 |
| Grillo Chemicals GmbH | 20 |
3 |
| Merck Patent GmbH | 5861 |
2 |
| Kao Corporation | 4952 |
2 |
| Other owners | 56 |