- All sections
- C - Chemistrymetallurgy
- C09K - Materials for applications not otherwise provided forapplications of materials not otherwise provided for
- C09K 8/44 - Compositions for cementing, e.g. for cementing casings into boreholesCompositions for plugging, e.g. for killing wells containing organic binders only
Patent holdings for IPC class C09K 8/44
Total number of patents in this class: 370
10-year publication summary
|
30
|
33
|
35
|
34
|
21
|
22
|
19
|
29
|
29
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21338 |
73 |
| Saudi Arabian Oil Company | 14235 |
60 |
| Aramco Services Company | 4195 |
15 |
| Schlumberger Technology Corporation | 11818 |
11 |
| Hilti Aktiengesellschaft | 3668 |
10 |
| China Petroleum & Chemical Corporation | 2152 |
9 |
| Denka Company Limited | 2720 |
8 |
| Kuraray Co., Ltd. | 3589 |
8 |
| Southwest Petroleum University | 521 |
7 |
| Chevron U.S.A. Inc. | 4140 |
6 |
| Baker Hughes Oilfield Operations, LLC | 2527 |
6 |
| Schlumberger Canada Limited | 7606 |
5 |
| Schlumberger Technology B.v. | 5298 |
5 |
| China University of Petroleum (East China) | 417 |
5 |
| Services Petroliers Schlumberger | 6024 |
5 |
| Yangtze University | 74 |
5 |
| Baker Hughes Holdings LLC | 3023 |
5 |
| Sinopec Petroleum Engineering Technology Research Institute Co., Ltd. | 57 |
5 |
| ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company | 186 |
5 |
| ConocoPhillips Company | 1709 |
4 |
| Other owners | 113 |