- 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 13/38 - Inorganic fibres or flakes siliceous
Patent holdings for IPC class D21H 13/38
Total number of patents in this class: 40
10-year publication summary
|
2
|
1
|
2
|
6
|
1
|
4
|
4
|
5
|
1
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nichias Corporation | 403 |
5 |
| Ibiden Co., Ltd. | 1661 |
3 |
| Denka Company Limited | 2712 |
2 |
| Fiberlean Technologies Limited | 98 |
2 |
| Paptic Oy | 31 |
2 |
| Thermal Ceramics Inc. | 23 |
2 |
| Paptic Ltd | 6 |
2 |
| Tomoegawa Corporation | 102 |
2 |
| 3m Innovative Properties Company | 17488 |
1 |
| Schaeffler Technologies AG & Co. KG | 10948 |
1 |
| Imae Industry Co., Ltd | 10 |
1 |
| Lydall, Inc. | 36 |
1 |
| MeadWestvaco Corporation | 272 |
1 |
| Morgan Advanced Materials plc | 117 |
1 |
| Pacon Ltd. & Co. KG | 4 |
1 |
| S & B Industrial Minerals GmbH | 10 |
1 |
| Sichuan University | 628 |
1 |
| Sud-chemie AG | 128 |
1 |
| Tomoegawa Co., Ltd. | 227 |
1 |
| Unifrax I LLC | 246 |
1 |
| Other owners | 8 |