Automatic air freshener with dynamically variable dispensing interval
US6644507B2 · kind B2 · utility
68Cited by
34References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2002 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Mar 14, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus periodically dispenses an air freshening substance from a pressurized container into a room. A device is provided to sense when the room is occupied, such as by detecting the light level in the room. The air freshening substance is dispensed more frequently when the room is being used than at other times. However, the dispensing continues even when the room is unoccupied to treat odors arising from objects permanently located in the room.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.