- All sections
- C - Chemistrymetallurgy
- C09K - Materials for applications not otherwise provided forapplications of materials not otherwise provided for
- C09K 8/42 - Compositions for cementing, e.g. for cementing casings into boreholesCompositions for plugging, e.g. for killing wells
Patent holdings for IPC class C09K 8/42
Total number of patents in this class: 1376
10-year publication summary
|
114
|
119
|
111
|
113
|
93
|
72
|
51
|
55
|
53
|
39
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20946 |
337 |
| Saudi Arabian Oil Company | 13372 |
157 |
| Schlumberger Technology Corporation | 10881 |
89 |
| Schlumberger Canada Limited | 7366 |
73 |
| Services Petroliers Schlumberger | 5828 |
62 |
| Schlumberger Technology B.v. | 5183 |
61 |
| Schlumberger Holdings Limited | 2803 |
35 |
| Prad Research and Development Limited | 2692 |
31 |
| Aramco Services Company | 4025 |
27 |
| CURTIS, Philip, Anthony | 411 |
27 |
| Southwest Petroleum University | 476 |
17 |
| Dorf Ketal Chemicals FZE | 199 |
17 |
| Flotek Chemistry, LLC | 116 |
15 |
| China University of Petroleum (East China) | 381 |
11 |
| Baker Hughes, a GE Company, LLC | 2110 |
11 |
| ConocoPhillips Company | 1675 |
10 |
| Thru Tubing Solutions, Inc. | 379 |
10 |
| Baker Hughes Holdings LLC | 3001 |
10 |
| Baker Hughes Incorporated | 5248 |
9 |
| China National Petroleum Corporation | 458 |
9 |
| Other owners | 358 |