- All sections
- E - Fixed constructions
- E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 43/241 - Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection combined with solution mining of non-hydrocarbon minerals, e.g. solvent pyrolysis of oil shale
Patent holdings for IPC class E21B 43/241
Total number of patents in this class: 137
10-year publication summary
|
15
|
24
|
9
|
14
|
18
|
13
|
5
|
3
|
4
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cenovus Energy Inc. | 422 |
26 |
| SunCor Energy Inc. | 736 |
17 |
| Imperial Oil Resources Limited | 169 |
16 |
| ConocoPhillips Company | 1675 |
11 |
| ExxonMobil Upstream Research Company | 2408 |
8 |
| Harris Corporation | 1437 |
5 |
| Halliburton Energy Services, Inc. | 20788 |
3 |
| Shell Internationale Research Maatschappij B.V. | 3553 |
3 |
| 101061615 Saskatchewan Ltd. | 5 |
3 |
| Flotek Chemistry, LLC | 116 |
3 |
| Hatch Ltd. | 213 |
3 |
| N-solv Corporation | 7 |
3 |
| Saudi Arabian Oil Company | 12911 |
3 |
| Shell Oil Company | 2141 |
2 |
| Canadian Natural Resources Limited | 42 |
2 |
| ExxonMobil Upstream Research Company | 5 |
2 |
| MEG Energy Corp. | 16 |
2 |
| Petrospec Engineering Inc. | 16 |
2 |
| Schlumberger Technology Corporation | 10652 |
1 |
| Dow Global Technologies LLC | 10385 |
1 |
| Other owners | 21 |