Vacuum cleaner
US6361587B1 · kind B1 · utility
13Cited by
19References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Dec 22, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vacuum cleaner assembly comprising a main housing, a primary filter system, and a secondary filter system. The main housing includes an inlet and an outlet. The primary filter system filters the air prior to being exhausted outwardly through the outlet. The secondary filter system is placed in downstream airflow from the primary filter system and provides additional filtering of the air prior to being exhausted to atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.