- 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: 3209
10-year publication summary
|
222
|
315
|
277
|
288
|
274
|
266
|
280
|
209
|
196
|
47
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 11322 |
297 |
| Halliburton Energy Services, Inc. | 20165 |
181 |
| Schlumberger Technology Corporation | 9690 |
152 |
| Aramco Services Company | 3504 |
83 |
| ExxonMobil Research And Engineering Company | 2830 |
79 |
| Schlumberger Canada Limited | 6913 |
68 |
| Services Petroliers Schlumberger | 5426 |
63 |
| Schlumberger Technology B.v. | 4951 |
59 |
| Schlumberger Holdings Limited | 2947 |
46 |
| Prad Research and Development Limited | 2696 |
38 |
| Caterpillar Inc. | 8877 |
33 |
| Pratt & Whitney Canada Corp. | 4215 |
32 |
| Chevron U.S.A. Inc. | 3774 |
29 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
27 |
| Aktiebolaget SKF | 2700 |
21 |
| Nabtesco Corporation | 871 |
20 |
| Phillips 66 Company | 1073 |
20 |
| ExxonMobil Upstream Research Company | 2525 |
19 |
| General Electric Company | 18133 |
18 |
| BP Corporation North America Inc. | 776 |
17 |
| Other owners | 1907 |