Vacuum cleaner
US11744422B2 · kind B2 · utility
0Cited by
49References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2020 |
| Grant date | Sep 5, 2023 |
| Priority date | — |
| Expiry date | Oct 27, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/244
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A vacuum cleaner includes an air treatment or debris removable assembly with a multi-layer filtration stage. The multi-layer filtration stage can include an outer mesh screen, a louvered exhaust grill, and a multi-layer filter. Optionally, an inner perforated exhaust grill is also provided. The debris removable assembly can further include a cyclonic filtration stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.