- 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: 471
10-year publication summary
|
27
|
28
|
56
|
65
|
37
|
21
|
16
|
21
|
11
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13428 |
112 |
| Halliburton Energy Services, Inc. | 20977 |
100 |
| Aramco Services Company | 4039 |
19 |
| Schlumberger Technology Corporation | 10914 |
18 |
| Schlumberger Canada Limited | 7373 |
14 |
| Schlumberger Technology B.v. | 5189 |
14 |
| Services Petroliers Schlumberger | 5835 |
14 |
| Denka Company Limited | 2630 |
9 |
| Schlumberger Holdings Limited | 2800 |
8 |
| Prad Research and Development Limited | 2690 |
8 |
| ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company | 185 |
8 |
| CURTIS, Philip, Anthony | 405 |
7 |
| Baker Hughes Holdings LLC | 2999 |
7 |
| BASF SE | 21039 |
6 |
| China National Petroleum Corporation | 461 |
6 |
| Energy Solutions (US) LLC | 36 |
6 |
| Dow Global Technologies LLC | 10448 |
5 |
| Kuraray Co., Ltd. | 3522 |
5 |
| Rhodia Operations | 1586 |
5 |
| Fritz Industries, Inc. | 10 |
4 |
| Other owners | 96 |