- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 31/32 - Calcium carbide
Patent holdings for IPC class C01B 31/32
Total number of patents in this class: 18
10-year publication summary
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Beijing University of Chemical Technology | 326 |
3 |
| Denki Kagaku Kogyo Kabushiki Kaisha | 592 |
3 |
| LP Amina LLC | 8 |
2 |
| Siemens AG | 24189 |
1 |
| Alzchem Trostberg GmbH | 264 |
1 |
| Arkema France | 4188 |
1 |
| Bayer Technology Services GmbH | 159 |
1 |
| Chung-Hsin Electric and Machinery Manufacturing Corp. | 5 |
1 |
| Ecoloop GmbH | 22 |
1 |
| The George Washington University | 447 |
1 |
| West Virginia University Research Corporation | 17 |
1 |
| Alzchem Hart GmbH | 1 |
1 |
| Bayer Technology and Engineering (Shanghai) Co., Ltd. | 5 |
1 |
| Other owners | 0 |