- All sections
- D - Textilespaper
- D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
- D21H 13/50 - Carbon fibres
Patent holdings for IPC class D21H 13/50
Total number of patents in this class: 134
10-year publication summary
|
7
|
9
|
13
|
11
|
10
|
10
|
4
|
8
|
8
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Chemical Corporation | 4671 |
8 |
| E. I. du Pont de Nemours and Company | 3762 |
7 |
| Toray Industries, Inc. | 7016 |
7 |
| Mitsubishi Rayon Co., Ltd. | 880 |
5 |
| DuPont Teijin Advanced Papers (Japan), Ltd. | 32 |
4 |
| Kuraray Co., Ltd. | 3559 |
3 |
| SABIC Global Technologies B.V. | 4460 |
3 |
| SGL Carbon SE | 396 |
3 |
| Teijin Aramid GmbH | 45 |
3 |
| United States Gypsum Company | 899 |
3 |
| AWA PAPER & TECHNOLOGICAL COMPANY, Inc. | 35 |
3 |
| Shanghai Jazz New Material Technology Co., Ltd | 5 |
3 |
| Dow Global Technologies LLC | 10707 |
2 |
| Kolon Industries, Inc. | 1744 |
2 |
| Nippon Paper Industries Co., Ltd. | 833 |
2 |
| Sumitomo Bakelite Co., Ltd. | 1519 |
2 |
| United Arab Emirates University | 363 |
2 |
| University of Rochester | 1333 |
2 |
| UT-Battelle, LLC | 1492 |
2 |
| Zeon Corporation | 4125 |
2 |
| Other owners | 66 |