Last Updated: September 24, 2026

Details for Patent: 4,851,229

Name: Drug Patent Intelligence for US Patent 4851229
Creator: DrugPatentWatch
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Summary for Patent: 4,851,229

Title:	Composition comprising a therapeutic agent and a modulating agent
Abstract:	An osmotic delivery system is disclosed for delivering a useful agent at a controlled and constant rate modulated by a pulsed delivery of the useful agent to an environment of use.
Inventor(s):	Paul R. Magruder, Brian Barclay, Patrick S. L. Wong, Felix Theeuwes
Assignee:	Alza Corp
Application Number:	US07/150,124
Patent Claim Types: see list of patent claims	Composition; Formulation; Delivery; Device;

Drugs Protected by US Patent 4,851,229

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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

International Family Members for US Patent 4,851,229

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Canada	1251708	⤷ Start Trial
Germany	3443586	⤷ Start Trial
Spain	293000	⤷ Start Trial
Spain	295960	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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