- 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 43/29 - Obtaining a slurry of minerals, e.g. by using nozzles
Patent holdings for IPC class E21B 43/29
Total number of patents in this class: 68
10-year publication summary
|
3
|
4
|
8
|
8
|
6
|
5
|
3
|
5
|
4
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Solvay Chemicals, Inc. | 21 |
3 |
| Stantec Consulting Ltd. | 23 |
3 |
| Dig Energy, Inc. | 10 |
3 |
| Shell Internationale Research Maatschappij B.V. | 3548 |
2 |
| Areva Resources Canada Inc. | 2 |
2 |
| Cameron International Corporation | 1335 |
2 |
| China University of Mining and Technology | 1256 |
2 |
| China University of Mining and Technology, Beijing | 93 |
2 |
| Iluka Resources Limited | 37 |
2 |
| Islander, LLC. | 2 |
2 |
| Cameron Technologies Limited | 212 |
2 |
| Geodrilling Technologies, Inc. | 2 |
2 |
| Novamera Inc. | 13 |
2 |
| 102062448 Saskatchewan Ltd. | 7 |
2 |
| Canatech Management Services Inc. | 2 |
2 |
| Drift Resource Technologies Inc. | 2 |
2 |
| Halliburton Energy Services, Inc. | 20911 |
1 |
| Harris Corporation | 1428 |
1 |
| Mitsubishi Chemical Corporation | 4525 |
1 |
| Anhui University of Science and Technology | 189 |
1 |
| Other owners | 29 |