- 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 23/00 - Processes or apparatus for adding material to the pulp or to the paper
Patent holdings for IPC class D21H 23/00
Total number of patents in this class: 46
10-year publication summary
|
1
|
4
|
1
|
2
|
0
|
2
|
2
|
0
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nalco Company | 536 |
3 |
| Voith Patent GmbH | 2752 |
3 |
| Philip Morris USA Inc. | 656 |
2 |
| Ecolab USA Inc. | 5792 |
2 |
| Kemira Oyj | 1258 |
2 |
| Schweitzer-Mauduit International, Inc. | 41 |
2 |
| Stora Enso Oyj | 1648 |
2 |
| Topchim N.V. | 10 |
2 |
| The Procter & Gamble Company | 21861 |
1 |
| The Boeing Company | 20160 |
1 |
| Kao Corporation | 5073 |
1 |
| Altria Client Services LLC | 2435 |
1 |
| Beijing Beishute Maternity & Child Articles., LTD | 4 |
1 |
| Billerudkorsnas AB | 88 |
1 |
| BVG Bauer Verfahrenstechnik GmbH | 5 |
1 |
| Centro Nacional de Pesquisa em Energia e Materiais CNPEM | 41 |
1 |
| The Chemours Company Fc, LLC | 1341 |
1 |
| Dolki Korea Ltd. | 8 |
1 |
| Ganeden Biotech, Inc. | 54 |
1 |
| Japan Tobacco Inc. | 3555 |
1 |
| Other owners | 16 |