- All sections
- B - Performing operations; transporting
- B01D - Separation
- B01D 71/36 - Polytetrafluoroethene
Patent holdings for IPC class B01D 71/36
Total number of patents in this class: 719
10-year publication summary
|
63
|
67
|
69
|
58
|
62
|
80
|
56
|
66
|
55
|
16
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nitto Denko Corporation | 7879 |
90 |
| W. L. Gore & Associates, Inc. | 2600 |
63 |
| Sumitomo Electric Industries, Ltd. | 14131 |
36 |
| Sumitomo Electric Fine Polymer, Inc. | 202 |
33 |
| FUJIFILM Corporation | 27102 |
30 |
| Daikin Industries, Ltd. | 9495 |
24 |
| Chongqing Runze Pharmaceutical Co., Ltd. | 81 |
24 |
| Entegris, Inc. | 1736 |
23 |
| Donaldson Company, Inc. | 1513 |
17 |
| Asahi Kasei Kabushiki Kaisha | 2429 |
16 |
| Sumitomo Chemical Company, Limited | 8808 |
7 |
| Compact Membrane Systems, Inc. | 43 |
6 |
| FUJIFILM Electronic Materials U.S.A., Inc. | 270 |
6 |
| Pall Corporation | 392 |
6 |
| W. L. Gore & Associates G.K. | 68 |
6 |
| LG Chem, Ltd. | 17205 |
5 |
| Gore Enterprise Holdings, Inc. | 217 |
5 |
| Markel Corporation | 37 |
5 |
| Renaissance Energy Research Corporation | 60 |
5 |
| Sartorius Stedim Biotech GmbH | 774 |
5 |
| Other owners | 307 |