Methods and devices for sustained release of substances
US9258988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2014 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Jul 16, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2209/131
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Devices that provide timed-release of target compounds absorbed by, or otherwise integrated into, an external housing. The external housing absorbs and facilitates volatilization of the released compound. A permeable cover can be employed as a regulating mechanism to control the rate volatilization from the external housing. One or more reservoirs containing target compound can be contained within one or more internal chambers of the external housing. The one or more reservoirs can release the target compound for absorption by the external housing and/or to make contact with one or more other reservoirs so as to compromise the other reservoirs and release target compound within. A wick can be employed in certain embodiments to transfer target compound from the internal chamber to the external housing to be volatilized. Continued or sequential release of target compound to recharged the external housing achieves a zero order release rate from the external housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.