- 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: 1369
10-year publication summary
|
145
|
135
|
123
|
118
|
98
|
76
|
53
|
56
|
58
|
31
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20891 |
344 |
| Saudi Arabian Oil Company | 13155 |
157 |
| Schlumberger Technology Corporation | 10717 |
88 |
| Schlumberger Canada Limited | 7296 |
72 |
| Services Petroliers Schlumberger | 5788 |
62 |
| Schlumberger Technology B.v. | 5168 |
61 |
| Schlumberger Holdings Limited | 2828 |
35 |
| Prad Research and Development Limited | 2693 |
31 |
| CURTIS, Philip, Anthony | 428 |
31 |
| Aramco Services Company | 3969 |
27 |
| Southwest Petroleum University | 470 |
17 |
| Dorf Ketal Chemicals FZE | 197 |
17 |
| Flotek Chemistry, LLC | 116 |
15 |
| Baker Hughes, a GE Company, LLC | 2112 |
11 |
| ConocoPhillips Company | 1673 |
10 |
| Thru Tubing Solutions, Inc. | 379 |
10 |
| Baker Hughes Holdings LLC | 3007 |
10 |
| Baker Hughes Incorporated | 5247 |
9 |
| China University of Petroleum (East China) | 372 |
9 |
| Chevron U.S.A. Inc. | 3955 |
8 |
| Other owners | 345 |