- 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: 143
10-year publication summary
|
6
|
1
|
2
|
2
|
5
|
2
|
3
|
3
|
2
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cenovus Energy Inc. | 428 |
30 |
| SunCor Energy Inc. | 739 |
17 |
| Imperial Oil Resources Limited | 170 |
16 |
| ConocoPhillips Company | 1698 |
11 |
| ExxonMobil Upstream Research Company | 2358 |
8 |
| Harris Corporation | 1364 |
5 |
| Saudi Arabian Oil Company | 13857 |
4 |
| Halliburton Energy Services, Inc. | 21098 |
3 |
| 101061615 Saskatchewan Ltd. | 5 |
3 |
| Flotek Chemistry, LLC | 116 |
3 |
| Hatch Ltd. | 215 |
3 |
| N-solv Corporation | 7 |
3 |
| Shell Internationale Research Maatschappij B.V. | 3504 |
2 |
| Shell Oil Company | 2114 |
2 |
| Canadian Natural Resources Limited | 44 |
2 |
| ExxonMobil Upstream Research Company | 6 |
2 |
| MEG Energy Corp. | 16 |
2 |
| Petrospec Engineering Inc. | 16 |
2 |
| 102062448 Saskatchewan Ltd. | 7 |
2 |
| Schlumberger Technology Corporation | 11274 |
1 |
| Other owners | 22 |