- All sections
- C - Chemistrymetallurgy
- C09K - Materials for applications not otherwise provided forapplications of materials not otherwise provided for
- C09K 8/72 - Eroding chemicals, e.g. acids
Patent holdings for IPC class C09K 8/72
Total number of patents in this class: 810
10-year publication summary
|
102
|
86
|
70
|
79
|
54
|
50
|
31
|
31
|
13
|
16
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20891 |
162 |
| Saudi Arabian Oil Company | 13155 |
89 |
| Schlumberger Canada Limited | 7296 |
34 |
| Schlumberger Technology B.v. | 5168 |
34 |
| Services Petroliers Schlumberger | 5788 |
34 |
| Schlumberger Holdings Limited | 2828 |
29 |
| Schlumberger Technology Corporation | 10717 |
28 |
| Aramco Services Company | 3969 |
26 |
| Prad Research and Development Limited | 2693 |
25 |
| CURTIS, Philip, Anthony | 428 |
24 |
| Baker Hughes Holdings LLC | 3007 |
17 |
| Akzo Nobel Chemicals International B.V. | 432 |
12 |
| Dorf Ketal Chemicals FZE | 52 |
12 |
| Baker Hughes Incorporated | 5247 |
11 |
| Fluid Energy Group Ltd. | 57 |
11 |
| Nissan Chemical America Corporation | 63 |
10 |
| Dorf Ketal Chemicals FZE | 197 |
10 |
| Cleansorb Limited | 32 |
8 |
| Nouryon Chemicals International B.V. | 608 |
8 |
| ENERGY SOLUTIONS (US) LLC, a Delaware limited liability company | 183 |
8 |
| Other owners | 218 |