Details for Patent: 6,113,938
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Summary for Patent: 6,113,938
Title: | Beneficial agent delivery system with membrane plug and method for controlling delivery of beneficial agents |
Abstract: | An osmotic delivery system for controlled delivery of a beneficial agent includes an implant capsule containing a beneficial agent and an osmotic agent which swells on contact with water causing the release of the beneficial agent over time. The osmotic delivery system has a membrane plug which allows water to pass through the plug from an exterior of the capsule while preventing the compositions within the capsule from passing out of the capsule. A delivery rate for delivery of the beneficial agent from the implant capsule is controlled by varying a core diameter of the membrane plug within a constant diameter capsule. The membrane plug has a variable water permeation rate depending on an extent to which the membrane plug is constrained by the capsule walls. |
Inventor(s): | Chen; Guohua (Sunnyvale, CA), Lautenbach; Scott (San Mateo, CA), Dionne; Keith (Cambridge, MA), Hom; Lawton (San Francisco, CA) |
Assignee: | ALZA Corporation (Mountain View, CA) |
Application Number: | 09/121,835 |
Patent Claim Types: see list of patent claims | Delivery; Dosage form; Device; Use; |
Drugs Protected by US Patent 6,113,938
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