- 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 13/06 - Cellulose esters
Patent holdings for IPC class D21H 13/06
Total number of patents in this class: 49
10-year publication summary
|
3
|
3
|
4
|
26
|
2
|
2
|
1
|
0
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Eastman Chemical Company | 2096 |
26 |
| Oji Holdings Corporation | 797 |
4 |
| GCF US Holdings LLC | 140 |
4 |
| Nippon Paper Industries Co., Ltd. | 851 |
3 |
| Nippon Paper Papylia Co., Ltd. | 38 |
2 |
| Hewlett-Packard Development Company, L.P. | 25175 |
1 |
| Andritz Oy | 294 |
1 |
| Celanese International Corporation | 910 |
1 |
| Daicel Corporation | 2544 |
1 |
| Daio Paper Corporation | 1410 |
1 |
| KT & G Corporation | 3132 |
1 |
| Primaloft, Inc. | 129 |
1 |
| Stora Enso Oyj | 1650 |
1 |
| Teijin Frontier Co., Ltd. | 251 |
1 |
| Metsä Spring Oy | 42 |
1 |
| Other owners | 0 |