- All sections
- C - Chemistry; metallurgy
- C09K - Materials for applications not otherwise provided for; applications of materials not otherwise provided for
- C09K 8/493 - Additives for reducing or preventing gas migration
Patent holdings for IPC class C09K 8/493
Total number of patents in this class: 72
10-year publication summary
6
|
2
|
4
|
8
|
7
|
8
|
6
|
5
|
1
|
2
|
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 |
17 |
Halliburton Energy Services, Inc. | 20165 |
11 |
Schlumberger Technology Corporation | 9690 |
6 |
Schlumberger Canada Limited | 6913 |
4 |
Schlumberger Technology B.v. | 4951 |
4 |
Aramco Services Company | 3504 |
4 |
Services Petroliers Schlumberger | 5426 |
4 |
China Petroleum & Chemical Corporation | 1623 |
2 |
CURTIS, Philip, Anthony | 497 |
2 |
ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company | 211 |
2 |
Schlumberger Holdings Limited | 2947 |
1 |
Baker Hughes Incorporated | 5689 |
1 |
Shell Internationale Research Maatschappij B.V. | 3792 |
1 |
Shell Oil Company | 2196 |
1 |
Dow Global Technologies LLC | 10147 |
1 |
Chevron U.S.A. Inc. | 3774 |
1 |
Petroleo Brasileiro S. A. - Petrobras | 2 |
1 |
Prad Research and Development Limited | 2696 |
1 |
Research Institute of Petroleum Industry (RIPI) | 4 |
1 |
Rhodia Operations | 1645 |
1 |
Other owners | 6 |