- All sections
- B - Performing operationstransporting
- B01J - Chemical or physical processes, e.g. catalysis or colloid chemistrytheir relevant apparatus
- B01J 21/04 - Alumina
Patent holdings for IPC class B01J 21/04
Total number of patents in this class: 3170
10-year publication summary
|
172
|
196
|
235
|
254
|
217
|
255
|
252
|
289
|
240
|
181
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| IFP Energies Nouvelles | 2980 |
182 |
| Johnson Matthey Public Limited Company | 1771 |
138 |
| BASF Corporation | 1708 |
100 |
| BASF SE | 21087 |
88 |
| Umicore AG & Co. KG | 862 |
76 |
| BASF Mobile Emissions Catalysts LLC | 415 |
71 |
| China Petroleum & Chemical Corporation | 1950 |
63 |
| Saudi Arabian Oil Company | 13656 |
61 |
| Uop LLC | 4259 |
60 |
| Toyota Motor Corporation | 33440 |
42 |
| Dow Global Technologies LLC | 10555 |
40 |
| Cataler Corporation | 576 |
38 |
| SABIC Global Technologies B.V. | 4403 |
37 |
| Chevron U.S.A. Inc. | 4018 |
36 |
| Shell Internationale Research Maatschappij B.V. | 3545 |
34 |
| LG Chem, Ltd. | 17679 |
28 |
| Shell USA, Inc. | 1253 |
28 |
| Scientific Design Company, Inc. | 117 |
25 |
| Magema Technology, LLC | 39 |
25 |
| NGK Insulators, Ltd. | 5144 |
24 |
| Other owners | 1974 |