- 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: 419
10-year publication summary
|
45
|
40
|
54
|
36
|
43
|
17
|
15
|
15
|
11
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20835 |
133 |
| Saudi Arabian Oil Company | 12947 |
56 |
| Schlumberger Technology Corporation | 10662 |
25 |
| Schlumberger Canada Limited | 7273 |
17 |
| Services Petroliers Schlumberger | 5772 |
17 |
| Schlumberger Technology B.v. | 5161 |
16 |
| Flotek Chemistry, LLC | 116 |
14 |
| CURTIS, Philip, Anthony | 436 |
13 |
| Prad Research and Development Limited | 2693 |
12 |
| Schlumberger Holdings Limited | 2835 |
11 |
| Aramco Services Company | 3929 |
6 |
| Baker Hughes Holdings LLC | 3005 |
6 |
| Chevron Phillips Chemical Company LP | 1837 |
5 |
| Oji Holdings Corporation | 717 |
5 |
| M-I L.L.C. | 813 |
4 |
| Rhodia Operations | 1587 |
4 |
| Baker Hughes Oilfield Operations, LLC | 2288 |
4 |
| ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company | 181 |
4 |
| Board of Regents, The University of Texas System | 5763 |
3 |
| Eavor Technologies Inc. | 90 |
3 |
| Other owners | 61 |