- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16K - Valvestapscocksactuating-floatsdevices for venting or aerating
- F16K 21/20 - Self-closing valves, i.e. closing automatically after operation closed when a rising liquid reaches a predetermined level by means making use of air-suction through an opening closed by the rising liquid
Patent holdings for IPC class F16K 21/20
Total number of patents in this class: 23
10-year publication summary
|
1
|
1
|
4
|
2
|
0
|
7
|
0
|
1
|
2
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Boston Scientific Scimed, Inc. | 10293 |
12 |
| Fluidmaster, Inc. | 142 |
6 |
| Adel Wiggins Group | 13 |
1 |
| Fuel Transfer Technologies Inc. | 29 |
1 |
| Product4 Limited | 2 |
1 |
| LUCIO, Gigliotti | 1 |
1 |
| Standard BioTools Inc. | 49 |
1 |
| Other owners | 0 |