- All sections
- B - Performing operationstransporting
- B01J - Chemical or physical processes, e.g. catalysis or colloid chemistrytheir relevant apparatus
- B01J 23/888 - Tungsten
Patent holdings for IPC class B01J 23/888
Total number of patents in this class: 580
10-year publication summary
|
45
|
42
|
45
|
29
|
27
|
39
|
26
|
27
|
24
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Chevron U.S.A. Inc. | 4155 |
42 |
| IFP Energies Nouvelles | 3099 |
40 |
| BASF SE | 21310 |
28 |
| Uop LLC | 4390 |
28 |
| China Petroleum & Chemical Corporation | 2160 |
24 |
| ExxonMobil Research And Engineering Company | 2402 |
20 |
| Dow Global Technologies LLC | 10981 |
14 |
| Shell Internationale Research Maatschappij B.V. | 3394 |
13 |
| Shell USA, Inc. | 1340 |
12 |
| Shell Oil Company | 2067 |
10 |
| ENI S.p.A. | 1310 |
10 |
| Research Institute of Petroleum Processing, Sinopec | 362 |
10 |
| Nippon Kayaku Kabushiki Kaisha | 1458 |
9 |
| Shin-Etsu Chemical Co., Ltd. | 6117 |
8 |
| Mitsubishi Chemical Corporation | 4724 |
7 |
| Nippon Shokubai Co., Ltd. | 1538 |
7 |
| Saudi Arabian Oil Company | 14296 |
7 |
| Toshiba Materials Co., Ltd. | 563 |
7 |
| Virent, Inc. | 145 |
7 |
| Albemarle Europe SPRL | 25 |
6 |
| Other owners | 271 |