- All sections
- C - Chemistrymetallurgy
- C09K - Materials for applications not otherwise provided forapplications of materials not otherwise provided for
- C09K 8/02 - Well-drilling compositions
Patent holdings for IPC class C09K 8/02
Total number of patents in this class: 355
10-year publication summary
|
45
|
16
|
11
|
13
|
11
|
9
|
5
|
7
|
5
|
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 |
91 |
| Schlumberger Technology Corporation | 11798 |
21 |
| Schlumberger Canada Limited | 7606 |
16 |
| Schlumberger Technology B.v. | 5298 |
16 |
| M-I L.L.C. | 747 |
16 |
| Services Petroliers Schlumberger | 6024 |
16 |
| Saudi Arabian Oil Company | 14207 |
14 |
| Baker Hughes Incorporated | 4940 |
13 |
| Schlumberger Holdings Limited | 2702 |
7 |
| Prad Research and Development Limited | 2662 |
7 |
| Chevron U.S.A. Inc. | 4134 |
4 |
| Aramco Services Company | 4188 |
4 |
| Kureha Corporation | 1059 |
4 |
| The Lubrizol Corporation | 1249 |
4 |
| Baker Hughes, a GE Company, LLC | 2057 |
4 |
| Ecolab USA Inc. | 5792 |
3 |
| ExxonMobil Upstream Research Company | 2306 |
3 |
| Fiber Resources, Inc. | 3 |
3 |
| China National Petroleum Corporation | 636 |
2 |
| CNPC USA Corp. | 181 |
2 |
| Other owners | 105 |