- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 31/02 - Preparation of carbon; Purification
Patent holdings for IPC class C01B 31/02
Total number of patents in this class: 3063
10-year publication summary
|
114
|
25
|
7
|
11
|
2
|
3
|
0
|
0
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| National Institute of Advanced Industrial Science and Technology | 3791 |
78 |
| Hon Hai Precision Industry Co., Ltd. | 4019 |
56 |
| Tsinghua University | 6260 |
56 |
| Zeon Corporation | 4183 |
49 |
| LG Chem, Ltd. | 17986 |
39 |
| NEC Corporation | 37532 |
37 |
| Toray Industries, Inc. | 7161 |
36 |
| Massachusetts Institute of Technology | 10322 |
28 |
| The Regents of the University of California | 20960 |
24 |
| Nitto Denko Corporation | 8640 |
21 |
| Showa Denko K.K. | 2050 |
21 |
| Seerstone LLC | 48 |
20 |
| The University of Tokyo | 4403 |
20 |
| William Marsh Rice University | 1082 |
20 |
| Honda Motor Co., Ltd. | 26657 |
19 |
| Commissariat à l'énergie atomique et aux energies alternatives | 11137 |
19 |
| Korea Advanced Institute of Science and Technology | 4725 |
19 |
| Toyo Tanso Co., Ltd. | 217 |
19 |
| Tokyo Electron Limited | 13987 |
18 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12301 |
18 |
| Other owners | 2446 |