- All sections
- C - Chemistrymetallurgy
- C09K - Materials for applications not otherwise provided forapplications of materials not otherwise provided for
- C09K 8/502 - Oil-based compositions
Patent holdings for IPC class C09K 8/502
Total number of patents in this class: 220
10-year publication summary
|
29
|
13
|
11
|
19
|
18
|
12
|
6
|
6
|
6
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21320 |
52 |
| Saudi Arabian Oil Company | 14207 |
29 |
| M-I L.L.C. | 747 |
13 |
| Schlumberger Technology Corporation | 11798 |
12 |
| Aramco Services Company | 4188 |
10 |
| Lamberti SpA | 258 |
9 |
| Schlumberger Canada Limited | 7606 |
5 |
| Schlumberger Technology B.v. | 5298 |
5 |
| Schlumberger Holdings Limited | 2702 |
5 |
| Prad Research and Development Limited | 2662 |
5 |
| Services Petroliers Schlumberger | 6024 |
5 |
| Baker Hughes Incorporated | 4940 |
4 |
| ENI S.p.A. | 1307 |
4 |
| Schlumberger Norge AS | 73 |
3 |
| Chevron Phillips Chemical Company LP | 1862 |
3 |
| Baker Hughes Oilfield Operations, LLC | 2521 |
3 |
| BP Exploration Operating Company Limited | 257 |
2 |
| China University of Petroleum (East China) | 417 |
2 |
| Elkem AS | 56 |
2 |
| M-I Drilling Fluids UK Limited | 89 |
2 |
| Other owners | 45 |