- 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 21/30 - Luminescent or fluorescent substances, e.g. for optical bleaching
Patent holdings for IPC class D21H 21/30
Total number of patents in this class: 156
10-year publication summary
|
23
|
11
|
5
|
3
|
6
|
5
|
1
|
3
|
0
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Archroma IP GmbH | 462 |
15 |
| Blankophor GmbH & Co. KG | 18 |
12 |
| Giesecke+Devrient Currency Technology GmbH | 958 |
12 |
| Milliken & Company | 1145 |
9 |
| Clariant Finance (BVI) Limited | 358 |
8 |
| Nalco Company | 535 |
8 |
| Cobank, Acb, AS Administrative Agent | 35 |
5 |
| Hewlett-Packard Development Company, L.P. | 25175 |
4 |
| International Paper Company | 600 |
4 |
| 3V Sigma S.p.A. | 28 |
3 |
| Bundesdruckerei GmbH | 987 |
3 |
| Ecolab USA Inc. | 5807 |
3 |
| Thomas Swan & Co. Ltd. | 34 |
3 |
| Tianjin University of Science and Technology | 77 |
3 |
| Abo Akademi University | 26 |
2 |
| Akzo Nobel N.V. | 146 |
2 |
| CCL Label, Inc. | 503 |
2 |
| Clariant International Ltd. | 893 |
2 |
| Kemira Oyj | 1259 |
2 |
| Omya International AG | 779 |
2 |
| Other owners | 52 |