- 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: 351
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. | 21300 |
90 |
| Schlumberger Technology Corporation | 12005 |
21 |
| Schlumberger Canada Limited | 7622 |
16 |
| Schlumberger Technology B.v. | 5294 |
16 |
| Services Petroliers Schlumberger | 6032 |
16 |
| M-I L.L.C. | 720 |
14 |
| Saudi Arabian Oil Company | 14416 |
14 |
| Baker Hughes Incorporated | 4861 |
13 |
| Schlumberger Holdings Limited | 2656 |
7 |
| Prad Research and Development Limited | 2641 |
7 |
| Chevron U.S.A. Inc. | 4186 |
4 |
| Aramco Services Company | 4191 |
4 |
| Kureha Corporation | 1096 |
4 |
| The Lubrizol Corporation | 1265 |
4 |
| Baker Hughes, a GE Company, LLC | 2022 |
4 |
| Ecolab USA Inc. | 5843 |
3 |
| ExxonMobil Upstream Research Company | 2276 |
3 |
| Fiber Resources, Inc. | 3 |
3 |
| China National Petroleum Corporation | 649 |
2 |
| CNPC USA Corp. | 184 |
2 |
| Other owners | 104 |