- 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 17/28 - Starch
Patent holdings for IPC class D21H 17/28
Total number of patents in this class: 509
10-year publication summary
35
|
32
|
39
|
39
|
46
|
45
|
32
|
37
|
43
|
15
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Kemira Oyj | 1167 |
46 |
Stora Enso Oyj | 1504 |
32 |
Ecolab USA Inc. | 5190 |
14 |
Philip Morris USA Inc. | 744 |
12 |
Solenis Technologies, L.P. | 306 |
12 |
First Quality Tissue, LLC | 143 |
11 |
Roquette Freres | 1002 |
11 |
Essity Operations France | 51 |
10 |
Seiko Epson Corporation | 18724 |
9 |
Fiberlean Technologies Limited | 116 |
9 |
BASF SE | 19740 |
8 |
International Paper Company | 857 |
8 |
Mondi AG | 129 |
8 |
Omya International AG | 816 |
8 |
University of Maine System Board of Trustees | 261 |
8 |
Global Holdings II, Inc. | 159 |
8 |
Corn Products Development, Inc. | 609 |
7 |
delfortgroup AG | 147 |
7 |
The Procter & Gamble Company | 22178 |
6 |
Kimberly-clark Worldwide, Inc. | 5854 |
6 |
Other owners | 269 |