- All sections
- B - Performing operationstransporting
- B01J - Chemical or physical processes, e.g. catalysis or colloid chemistrytheir relevant apparatus
- B01J 37/28 - Phosphorising
Patent holdings for IPC class B01J 37/28
Total number of patents in this class: 323
10-year publication summary
|
30
|
20
|
19
|
20
|
14
|
12
|
13
|
5
|
19
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| IFP Energies Nouvelles | 2937 |
25 |
| Total Research & Technology Feluy | 446 |
20 |
| Shell Internationale Research Maatschappij B.V. | 3548 |
14 |
| Saudi Arabian Oil Company | 13224 |
12 |
| BASF Corporation | 1716 |
11 |
| Shell Oil Company | 2138 |
9 |
| Advanced Refining Technologies LLC | 59 |
9 |
| China Petroleum & Chemical Corporation | 1901 |
9 |
| ExxonMobil Research And Engineering Company | 2570 |
8 |
| Indian Oil Corporation Limited | 335 |
8 |
| Research Institute of Petroleum Processing, Sinopec | 374 |
8 |
| Shell USA, Inc. | 1225 |
8 |
| BASF SE | 20940 |
6 |
| PetroChina Company Limited | 709 |
6 |
| Hindustan Petroleum Corporation Limited | 214 |
5 |
| Johnson Matthey Public Limited Company | 1866 |
5 |
| Ketjen Limited Liability Company | 64 |
5 |
| ExxonMobil Chemical Patents Inc. | 3977 |
4 |
| Saudi Basic Industries Corporation | 554 |
4 |
| AMG Chemistry and Catalysis Consulting, LLC | 4 |
4 |
| Other owners | 143 |