- 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 23/70 - Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
Patent holdings for IPC class D21H 23/70
Total number of patents in this class: 40
10-year publication summary
|
3
|
6
|
1
|
4
|
2
|
2
|
2
|
1
|
1
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Stora Enso Oyj | 1504 |
5 |
| Vits Technology GmbH | 19 |
3 |
| Kimberly-clark Worldwide, Inc. | 5854 |
2 |
| Knu-industry Cooperation Foundation | 122 |
2 |
| Mondi AG | 129 |
2 |
| Topchim N.V. | 13 |
2 |
| Voith Patent GmbH | 2727 |
2 |
| Daehan Paper Co.,Ltd. | 5 |
2 |
| Taekyung Polymer Co., Ltd. | 5 |
2 |
| The Procter & Gamble Company | 22178 |
1 |
| BASF SE | 19740 |
1 |
| Arclin USA, LLC. | 75 |
1 |
| Arjo Wiggins Fine Papers Limited | 28 |
1 |
| Centre Technique de l'industrie des Papiers, Cartons et Celluloses | 21 |
1 |
| Ciba Holding Inc. | 177 |
1 |
| Daio Paper Corporation | 1407 |
1 |
| EXCOR Korrosionsforschung GmbH | 3 |
1 |
| Fedrigoni S.p.A. | 243 |
1 |
| Kemira Oyj | 1167 |
1 |
| M-real Oyj | 46 |
1 |
| Other owners | 7 |