- All sections
- C - Chemistrymetallurgy
- C09K - Materials for applications not otherwise provided forapplications of materials not otherwise provided for
- C09K 8/487 - Fluid loss control additivesAdditives for reducing or preventing circulation loss
Patent holdings for IPC class C09K 8/487
Total number of patents in this class: 513
10-year publication summary
|
29
|
58
|
72
|
37
|
21
|
17
|
23
|
12
|
25
|
19
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 14390 |
116 |
| Halliburton Energy Services, Inc. | 21299 |
107 |
| Schlumberger Technology Corporation | 11961 |
25 |
| Aramco Services Company | 4191 |
21 |
| Schlumberger Canada Limited | 7616 |
20 |
| Schlumberger Technology B.v. | 5289 |
19 |
| Services Petroliers Schlumberger | 6024 |
19 |
| Schlumberger Holdings Limited | 2660 |
8 |
| Denka Company Limited | 2767 |
8 |
| Prad Research and Development Limited | 2642 |
8 |
| ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company | 184 |
8 |
| BASF SE | 21318 |
7 |
| China National Petroleum Corporation | 645 |
7 |
| Baker Hughes Holdings LLC | 3011 |
7 |
| CURTIS, Philip, Anthony | 312 |
6 |
| Energy Solutions (US) LLC | 36 |
6 |
| Dow Global Technologies LLC | 11051 |
5 |
| Kuraray Co., Ltd. | 3616 |
5 |
| Rhodia Operations | 1484 |
5 |
| China University of Petroleum (East China) | 428 |
4 |
| Other owners | 102 |