Device for administering active agent to biological environment
US5417682A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1994 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Jan 21, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/4808
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention is directed to a fluid-imbibing dispensing device for the immediate or almost immediate and extended delivery of an active agent over a prolonged period of time together with the initially delayed pulse delivery of an active agent to a fluid environment of use. The dispenser comprises a housing having a first wall section and a second wall section in slidably telescoping arrangement with each other, which housing maintains its integrity in the environment of use; an internal compartment surrounded and defined by the housing; a first active agent delivery chamber within a portion of the compartment defined by the first wall section, the first delivery chamber including at least one active agent formulation, an exit means for providing communication between the active agent formulation and the environment, and a first expansion means for dispensing the first active agent formulation through the exit means to the environment immediately and over a prolonged period of time; a second active agent delivery chamber within a portion of the compartment defined by the first wall section and adjacent the open end of the first wall section, the second delivery chamber inc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.