- 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 13/36 - Inorganic fibres or flakes
Patent holdings for IPC class D21H 13/36
Total number of patents in this class: 69
10-year publication summary
|
5
|
3
|
1
|
7
|
3
|
5
|
2
|
9
|
5
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Ibiden Co., Ltd. | 1680 |
11 |
| Nichias Corporation | 405 |
6 |
| 3m Innovative Properties Company | 17455 |
5 |
| Tomoegawa Corporation | 111 |
5 |
| REEP Technologies Ltd | 7 |
3 |
| Paptic Ltd | 6 |
3 |
| Kuraray Co., Ltd. | 3606 |
2 |
| Lydall, Inc. | 36 |
2 |
| Thermal Ceramics Inc. | 23 |
2 |
| Unifrax I LLC | 247 |
2 |
| Howicken Management Limited | 11 |
2 |
| Siemens AG | 23956 |
1 |
| E. I. du Pont de Nemours and Company | 3460 |
1 |
| Philip Morris Products S.A. | 8291 |
1 |
| Kao Corporation | 5100 |
1 |
| Schaeffler Technologies AG & Co. KG | 11182 |
1 |
| Northwestern University | 3570 |
1 |
| DBW Holding GmbH | 5 |
1 |
| DuPont Teijin Advanced Papers, Ltd. | 6 |
1 |
| Eastman Chemical Company | 2114 |
1 |
| Other owners | 17 |