- All sections
- G - Physics
- G01N - Investigating or analysing materials by determining their chemical or physical properties
- G01N 33/28 - Oils
Patent holdings for IPC class G01N 33/28
Total number of patents in this class: 3471
10-year publication summary
|
277
|
288
|
274
|
266
|
283
|
214
|
215
|
168
|
168
|
93
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 14235 |
356 |
| Halliburton Energy Services, Inc. | 21338 |
206 |
| Schlumberger Technology Corporation | 11818 |
185 |
| Aramco Services Company | 4195 |
93 |
| ExxonMobil Research And Engineering Company | 2422 |
74 |
| Schlumberger Canada Limited | 7606 |
63 |
| Services Petroliers Schlumberger | 6024 |
58 |
| Schlumberger Technology B.v. | 5298 |
56 |
| Schlumberger Holdings Limited | 2699 |
39 |
| Caterpillar Inc. | 10267 |
39 |
| Prad Research and Development Limited | 2661 |
38 |
| Pratt & Whitney Canada Corp. | 5479 |
36 |
| Chevron U.S.A. Inc. | 4140 |
33 |
| Shell Internationale Research Maatschappij B.V. | 3403 |
25 |
| Aktiebolaget SKF | 3128 |
25 |
| Marathon Petroleum Company LP | 413 |
22 |
| Phillips 66 Company | 1019 |
22 |
| King Abdullah University of Science and Technology | 1852 |
20 |
| ExxonMobil Upstream Research Company | 2305 |
19 |
| Nabtesco Corporation | 862 |
19 |
| Other owners | 2043 |