- All sections
- D - Textiles; paper
- D21H - Pulp compositions; preparation thereof not covered by subclasses , ; impregnating or coating of paper; treatment of finished paper not covered by class or subclass ; paper not otherwise provided for
- D21H 23/24 - Addition to the formed paper during paper manufacture
Patent holdings for IPC class D21H 23/24
Total number of patents in this class: 101
10-year publication summary
|
10
|
6
|
5
|
5
|
6
|
3
|
8
|
4
|
9
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Ecolab USA Inc. | 5341 |
9 |
| Voith Patent GmbH | 2736 |
8 |
| Kimberly-clark Worldwide, Inc. | 5515 |
6 |
| Nalco Company | 596 |
6 |
| Kemira Oyj | 1210 |
5 |
| Stora Enso Oyj | 1605 |
4 |
| Seiko Epson Corporation | 18989 |
3 |
| Metsa Board Oyj | 51 |
3 |
| Hewlett-Packard Development Company, L.P. | 27461 |
2 |
| The Regents of the University of Michigan | 4578 |
2 |
| Buckman Laboratories International, Inc. | 239 |
2 |
| Georgia-Pacific Consumer Products LP | 115 |
2 |
| Metso Paper, Inc. | 475 |
2 |
| Solenis Technologies, L.P. | 321 |
2 |
| Tagit - Eas LTD | 2 |
2 |
| Cobank, Acb, AS Administrative Agent | 37 |
2 |
| BASF SE | 20432 |
1 |
| Toray Industries, Inc. | 6855 |
1 |
| Mitsubishi Chemical Corporation | 4447 |
1 |
| Ahlstrom Corporation | 76 |
1 |
| Other owners | 37 |