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Last Updated: December 12, 2025

Claims for Patent: 6,156,331

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Summary for Patent: 6,156,331

Title:	Sustained delivery of an active agent using an implantable system
Abstract:	The invention is directed to a device for delivering an active agent formulation for a predetermined administration period. An impermeable reservoir is divided into a water-swellable agent chamber and an active agent formulation chamber. Fluid from the environment is imbibed through a semipermeable plug into the water-swellable agent chamber and the active agent formulation is released through a back-diffusion regulating outlet. Delivery periods of up to 2 years are achieved.
Inventor(s):	John R. Peery, Keith E. Dionne, James B. Eckenhoff, deceased, Felix A. Landrau, Scott D. Lautenbach, Judy A Magruder, Jeremy C. Wright
Assignee:	Intarcia Therapeutics Inc
Application Number:	US09/310,149
Patent Claims:

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