- 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 43/285 - Melting minerals, e.g. sulfur
Patent holdings for IPC class E21B 43/285
Total number of patents in this class: 19
10-year publication summary
|
1
|
0
|
2
|
2
|
1
|
3
|
1
|
2
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| China Petroleum & Chemical Corporation | 1783 |
2 |
| Lamrock Canada Incorporated | 8 |
2 |
| SunCor Energy Inc. | 765 |
2 |
| Steam Injection Technology Service Center of Shenglioilfield Sinopec | 3 |
2 |
| ExxonMobil Upstream Research Company | 2454 |
1 |
| Japan Agency for Marine-Earth Science and Technology | 178 |
1 |
| Northeastern University | 522 |
1 |
| Total SA | 504 |
1 |
| The University of Bristol | 240 |
1 |
| Debusschere, Sandy | 2 |
1 |
| Ferguson, Michael J. | 1 |
1 |
| Mcewan, John S. | 1 |
1 |
| Ramey, Max | 1 |
1 |
| Locus Oil IP Company, LLC | 23 |
1 |
| Baker Hughes Holdings LLC | 3009 |
1 |
| Other owners | 0 |