Dispensing device
US6012643A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1998 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Oct 5, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for the controlled release of vapour and a method of dispensing a volatile medium into the air. The device includes a carrier impregnated with a volatile medium and a wrapper of flexible material surrounding said carrier for retaining the volatile medium on the carrier. Said wrapper has a plurality of contiguous tear strips arranged in longitudinal sequence disposed over the carrier that may be successively removed to expose a portion of the carrier of increasing size without any need to provide for relative movement of the wrapper and carrier. The method of dispensing a volatile medium into the air includes providing such a device, removing a first tear strip to expose a portion of the carrier, and subsequently removing an additional tear strip to expose a fresh area of carrier to maintain the concentration of volatile medium at a desired level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.