- All sections
- C - Chemistrymetallurgy
- C09K - Materials for applications not otherwise provided forapplications of materials not otherwise provided for
- C09K 8/40 - Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
Patent holdings for IPC class C09K 8/40
Total number of patents in this class: 417
10-year publication summary
|
40
|
54
|
36
|
43
|
17
|
15
|
14
|
12
|
5
|
8
|
| 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 |
125 |
| Saudi Arabian Oil Company | 14235 |
55 |
| Schlumberger Technology Corporation | 11818 |
27 |
| Schlumberger Canada Limited | 7606 |
17 |
| Services Petroliers Schlumberger | 6024 |
17 |
| Schlumberger Technology B.v. | 5298 |
16 |
| Flotek Chemistry, LLC | 115 |
14 |
| Prad Research and Development Limited | 2661 |
12 |
| Schlumberger Holdings Limited | 2699 |
11 |
| CURTIS, Philip, Anthony | 331 |
11 |
| Aramco Services Company | 4195 |
6 |
| Baker Hughes Oilfield Operations, LLC | 2527 |
6 |
| Baker Hughes Holdings LLC | 3023 |
6 |
| Chevron Phillips Chemical Company LP | 1861 |
5 |
| Oji Holdings Corporation | 797 |
5 |
| M-I L.L.C. | 746 |
4 |
| Rhodia Operations | 1494 |
4 |
| ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company | 186 |
4 |
| Exero Well Integrity | 5 |
4 |
| Board of Regents, The University of Texas System | 6107 |
3 |
| Other owners | 65 |