- All sections
- C - Chemistrymetallurgy
- C09B - Organic dyes or closely-related compounds for producing dyesmordantslakes
- C09B 43/04 - Preparation of azo dyes from other azo compounds by nitration
Patent holdings for IPC class C09B 43/04
Total number of patents in this class: 5
10-year publication summary
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Schlumberger Canada Limited | 7332 |
1 |
| Schlumberger Technology B.v. | 5176 |
1 |
| Schlumberger Holdings Limited | 2817 |
1 |
| Prad Research and Development Limited | 2693 |
1 |
| Services Petroliers Schlumberger | 5803 |
1 |
| Other owners | 0 |