- 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: 3424
10-year publication summary
|
261
|
266
|
260
|
253
|
268
|
207
|
200
|
159
|
160
|
20
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 13791 |
350 |
| Halliburton Energy Services, Inc. | 21110 |
203 |
| Schlumberger Technology Corporation | 11217 |
178 |
| Aramco Services Company | 4145 |
96 |
| ExxonMobil Research And Engineering Company | 2505 |
76 |
| Schlumberger Canada Limited | 7478 |
64 |
| Services Petroliers Schlumberger | 5912 |
59 |
| Schlumberger Technology B.v. | 5236 |
57 |
| Schlumberger Holdings Limited | 2759 |
40 |
| Caterpillar Inc. | 9950 |
39 |
| Prad Research and Development Limited | 2686 |
38 |
| Pratt & Whitney Canada Corp. | 5039 |
36 |
| Chevron U.S.A. Inc. | 4043 |
32 |
| Shell Internationale Research Maatschappij B.V. | 3514 |
25 |
| Aktiebolaget SKF | 3034 |
23 |
| King Abdullah University of Science and Technology | 1823 |
23 |
| Phillips 66 Company | 1059 |
22 |
| ExxonMobil Upstream Research Company | 2368 |
19 |
| Marathon Petroleum Company LP | 390 |
19 |
| Nabtesco Corporation | 877 |
19 |
| Other owners | 2006 |