- All sections
- B - Performing operations; transporting
- B01J - Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J 23/888 - Tungsten
Patent holdings for IPC class B01J 23/888
Total number of patents in this class: 560
10-year publication summary
|
47
|
32
|
45
|
42
|
45
|
30
|
26
|
38
|
24
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Chevron U.S.A. Inc. | 3774 |
39 |
| IFP Energies Nouvelles | 2717 |
37 |
| ExxonMobil Research And Engineering Company | 2830 |
30 |
| Uop LLC | 4083 |
27 |
| BASF SE | 19740 |
25 |
| China Petroleum & Chemical Corporation | 1623 |
23 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
13 |
| Research Institute of Petroleum Processing, Sinopec | 387 |
12 |
| Albemarle Netherlands B.V. | 93 |
11 |
| Shell USA, Inc. | 1074 |
11 |
| Shell Oil Company | 2196 |
10 |
| ENI S.p.A. | 1241 |
10 |
| Albemarle Europe SPRL | 38 |
9 |
| Shin-Etsu Chemical Co., Ltd. | 5132 |
8 |
| Mitsubishi Chemical Corporation | 4313 |
8 |
| Toshiba Corporation | 12017 |
7 |
| Nippon Shokubai Co., Ltd. | 1487 |
7 |
| Toshiba Materials Co., Ltd. | 600 |
7 |
| Virent, Inc. | 107 |
7 |
| Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 614 |
6 |
| Other owners | 253 |