- 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: 3166
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 | 3794 |
79 |
| Hon Hai Precision Industry Co., Ltd. | 4009 |
58 |
| Tsinghua University | 6091 |
58 |
| Zeon Corporation | 4129 |
49 |
| NEC Corporation | 36472 |
40 |
| LG Chem, Ltd. | 17778 |
39 |
| Toray Industries, Inc. | 7023 |
36 |
| Massachusetts Institute of Technology | 10195 |
30 |
| William Marsh Rice University | 1058 |
27 |
| The Regents of the University of California | 20473 |
24 |
| Fujitsu Limited | 17247 |
22 |
| Honda Motor Co., Ltd. | 25802 |
21 |
| Nitto Denko Corporation | 8422 |
21 |
| Showa Denko K.K. | 2121 |
21 |
| Seerstone LLC | 47 |
20 |
| The University of Tokyo | 4304 |
20 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10983 |
19 |
| Korea Advanced Institute of Science and Technology | 4537 |
19 |
| Kuraray Co., Ltd. | 3563 |
19 |
| Toyo Tanso Co., Ltd. | 218 |
19 |
| Other owners | 2525 |