- 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 23/78 - Controlling or regulating not limited to any particular process or apparatus
Patent holdings for IPC class D21H 23/78
Total number of patents in this class: 74
10-year publication summary
|
2
|
2
|
10
|
3
|
6
|
1
|
9
|
3
|
11
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1261 |
17 |
| Kimberly-clark Worldwide, Inc. | 5295 |
7 |
| Voith Patent GmbH | 2743 |
6 |
| Brown LLC | 82 |
5 |
| International Paper Company | 599 |
4 |
| Nalco Company | 535 |
4 |
| Stora Enso Oyj | 1654 |
4 |
| Seiko Epson Corporation | 20327 |
2 |
| Ecolab USA Inc. | 5810 |
2 |
| Eldorado Brasil Celulose S.A. | 4 |
2 |
| Metso Paper, Inc. | 335 |
2 |
| Adpap Oy | 2 |
2 |
| Cobank, Acb, AS Administrative Agent | 35 |
2 |
| 3m Innovative Properties Company | 17484 |
1 |
| ABB Research Ltd. | 788 |
1 |
| BTG Instruments AB | 9 |
1 |
| Buckman Laboratories International, Inc. | 240 |
1 |
| Domtar Paper Company, LLC | 123 |
1 |
| Dubois Chemicals, Inc. | 172 |
1 |
| Hercules Incorporated | 113 |
1 |
| Other owners | 8 |