- All sections
- B - Performing operations; transporting
- B01J - Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J 21/04 - Alumina
Patent holdings for IPC class B01J 21/04
Total number of patents in this class: 2839
10-year publication summary
|
209
|
181
|
203
|
243
|
261
|
221
|
260
|
257
|
276
|
86
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| IFP Energies Nouvelles | 2717 |
160 |
| BASF Corporation | 2039 |
155 |
| Johnson Matthey Public Limited Company | 1852 |
133 |
| BASF SE | 19740 |
82 |
| Umicore AG & Co. KG | 867 |
72 |
| Uop LLC | 4083 |
57 |
| China Petroleum & Chemical Corporation | 1623 |
50 |
| Saudi Arabian Oil Company | 11322 |
46 |
| Toyota Motor Corporation | 28582 |
40 |
| SABIC Global Technologies B.V. | 4044 |
35 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
33 |
| Dow Global Technologies LLC | 10147 |
32 |
| Cataler Corporation | 533 |
32 |
| Chevron U.S.A. Inc. | 3774 |
30 |
| Shell USA, Inc. | 1074 |
27 |
| Scientific Design Company, Inc. | 131 |
26 |
| Sasol Germany GmbH | 211 |
25 |
| NGK Insulators, Ltd. | 4589 |
24 |
| LG Chem, Ltd. | 17205 |
23 |
| Clariant International Ltd. | 978 |
23 |
| Other owners | 1734 |