- All sections
- C - Chemistry; metallurgy
- C09K - Materials for applications not otherwise provided for; applications of materials not otherwise provided for
- C09K 8/48 - Density increasing or weighting additives
Patent holdings for IPC class C09K 8/48
Total number of patents in this class: 140
10-year publication summary
|
9
|
10
|
16
|
30
|
17
|
10
|
4
|
6
|
5
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 11322 |
41 |
| Halliburton Energy Services, Inc. | 20165 |
30 |
| Schlumberger Technology Corporation | 9690 |
6 |
| Schlumberger Canada Limited | 6913 |
5 |
| Schlumberger Technology B.v. | 4951 |
5 |
| Services Petroliers Schlumberger | 5426 |
5 |
| Aramco Services Company | 3504 |
4 |
| M-I L.L.C. | 893 |
4 |
| Baker Hughes Holdings LLC | 3060 |
4 |
| Schlumberger Holdings Limited | 2947 |
3 |
| Elkem AS | 66 |
3 |
| Prad Research and Development Limited | 2696 |
3 |
| Forta, LLC | 57 |
3 |
| TURNER, Craig, Robert | 152 |
2 |
| Baker Hughes Incorporated | 5689 |
1 |
| Bromine Compounds Ltd. | 196 |
1 |
| Chevron Phillips Chemical Company LP | 1779 |
1 |
| China National Petroleum Corporation | 245 |
1 |
| Elkem ASA | 205 |
1 |
| ENI S.p.A. | 1241 |
1 |
| Other owners | 16 |