- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 43/40 - Separation associated with re-injection of separated materials
Patent holdings for IPC class E21B 43/40
Total number of patents in this class: 529
10-year publication summary
|
74
|
56
|
57
|
45
|
45
|
40
|
35
|
36
|
31
|
11
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ExxonMobil Upstream Research Company | 2525 |
26 |
| Saudi Arabian Oil Company | 11322 |
25 |
| Halliburton Energy Services, Inc. | 20165 |
18 |
| SunCor Energy Inc. | 838 |
16 |
| Chevron U.S.A. Inc. | 3774 |
14 |
| Veolia Water Technologies, Inc. | 80 |
14 |
| Equinor Energy AS | 475 |
14 |
| Cenovus Energy Inc. | 321 |
9 |
| ConocoPhillips Company | 1657 |
9 |
| General Electric Company | 18133 |
8 |
| Pilot Energy Solutions, LLC | 22 |
7 |
| Statoil Petroleum AS | 555 |
7 |
| Schlumberger Technology Corporation | 9690 |
6 |
| BL Technologies, Inc. | 831 |
6 |
| Hydrozonix LLC | 31 |
6 |
| Imperial Oil Resources Limited | 182 |
6 |
| Linde Aktiengesellschaft | 1600 |
6 |
| M-I L.L.C. | 893 |
6 |
| XDI Holdings, LLC | 68 |
6 |
| Baker Hughes Incorporated | 5689 |
5 |
| Other owners | 315 |