Last Updated: August 24, 2026

Details for Patent: 5,728,396

Name: Drug Patent Intelligence for US Patent 5728396
Creator: DrugPatentWatch
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Summary for Patent: 5,728,396

Title:	Sustained delivery of leuprolide 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, Felix A. Landrau, Scott D. Lautenbach, Judy A. Magruder, Jeremy C. Wright
Assignee:	Intarcia Therapeutics Inc
Application Number:	US08/791,699
Patent Claim Types: see list of patent claims	Use; Formulation; Delivery;

Drugs Protected by US Patent 5,728,396

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Submissiondate
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

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Argentina	006079	⤷ Start Trial
Argentina	010595	⤷ Start Trial
Austria	235224	⤷ Start Trial
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Austria	277595	⤷ Start Trial
Austria	281153	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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