- 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 43/243 - Combustion in situ
Patent holdings for IPC class E21B 43/243
Total number of patents in this class: 234
10-year publication summary
|
23
|
12
|
6
|
13
|
4
|
8
|
20
|
8
|
9
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ConocoPhillips Company | 1677 |
18 |
| Linc Energy Ltd | 20 |
10 |
| SunCor Energy Inc. | 738 |
8 |
| Archon Technologies Ltd. | 9 |
7 |
| General Energy Recovery Inc. | 19 |
7 |
| World Energy Systems Incorporated | 26 |
6 |
| Carbon Energy Limited | 6 |
5 |
| ERGO Exergy Technologies Inc. | 10 |
5 |
| Precision Combustion, Inc. | 104 |
5 |
| Saudi Arabian Oil Company | 12947 |
5 |
| Aptiv Technologies AG | 2341 |
5 |
| Halliburton Energy Services, Inc. | 20835 |
4 |
| Northrop Grumman Systems Corporation | 2951 |
4 |
| Cenovus Energy Inc. | 420 |
4 |
| Foret Plasma Labs, LLC | 66 |
4 |
| Nexen Energy ULC | 43 |
4 |
| Schlumberger Technology Corporation | 10662 |
3 |
| Shell Internationale Research Maatschappij B.V. | 3551 |
3 |
| Shell Oil Company | 2141 |
3 |
| China Petroleum & Chemical Corporation | 1882 |
3 |
| Other owners | 121 |