- 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: 227
10-year publication summary
|
21
|
29
|
13
|
11
|
19
|
18
|
12
|
6
|
6
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20788 |
55 |
| Saudi Arabian Oil Company | 12911 |
27 |
| M-I L.L.C. | 815 |
15 |
| Schlumberger Technology Corporation | 10652 |
12 |
| Aramco Services Company | 3927 |
10 |
| Lamberti SpA | 254 |
9 |
| Schlumberger Canada Limited | 7266 |
5 |
| Schlumberger Technology B.v. | 5160 |
5 |
| Schlumberger Holdings Limited | 2839 |
5 |
| Prad Research and Development Limited | 2693 |
5 |
| Services Petroliers Schlumberger | 5771 |
5 |
| Baker Hughes Incorporated | 5279 |
4 |
| ENI S.p.A. | 1257 |
4 |
| CURTIS, Philip, Anthony | 436 |
4 |
| Schlumberger Norge AS | 73 |
3 |
| BP Exploration Operating Company Limited | 264 |
3 |
| Chevron Phillips Chemical Company LP | 1836 |
3 |
| Baker Hughes Oilfield Operations, LLC | 2283 |
3 |
| China University of Petroleum (East China) | 370 |
2 |
| Elkem AS | 61 |
2 |
| Other owners | 46 |