- 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 43/295 - Gasification of minerals, e.g. for producing mixtures of combustible gases
Patent holdings for IPC class E21B 43/295
Total number of patents in this class: 142
10-year publication summary
|
5
|
9
|
5
|
3
|
6
|
11
|
13
|
11
|
15
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Linc Energy Ltd | 20 |
14 |
| ENN Coal Gasification Mining Co., Ltd. | 16 |
8 |
| ERGO Exergy Technologies Inc. | 11 |
8 |
| Zhongwei (Shanghai) Energy Technology Co. Ltd | 8 |
8 |
| Halliburton Energy Services, Inc. | 21098 |
5 |
| Chevron U.S.A. Inc. | 4048 |
5 |
| University of Wyoming | 375 |
4 |
| Koloma, Inc. | 43 |
4 |
| Board of Regents, The University of Texas System | 6010 |
3 |
| Nexen Energy ULC | 43 |
3 |
| Saudi Arabian Oil Company | 13857 |
3 |
| ProtonH2 Analytics, Limited | 5 |
3 |
| Schlumberger Technology Corporation | 11274 |
2 |
| Anhui University of Science and Technology | 190 |
2 |
| Aramco Services Company | 4157 |
2 |
| CGG Services SA | 431 |
2 |
| Dalian University of Technology | 1565 |
2 |
| Production Plus Energy Services Inc. | 4 |
2 |
| Shandong University of Science and Technology | 538 |
2 |
| Proton Technologies Inc. | 2 |
2 |
| Other owners | 58 |