Last Updated: May 10, 2026

Details for Patent: 6,790,459

Name: Drug Patent Intelligence for US Patent 6790459
Creator: DrugPatentWatch
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Summary for Patent: 6,790,459

Title:	Methods for treating diabetes via administration of controlled release metformin
Abstract:	A method for treating patients having non-insulin-dependent diabetes mellitus (NIDDM) by administering a controlled release oral solid dosage form containing preferably a biguanide drug such as metformin, on a once-a-day basis. The dosage form provides a mean time to maximum plasma concentration (Tmax) of the drug which occurs at a 5.5 to 7.5 hours after oral administration on a once-a-day basis to human patients. Preferably, the dose of drug is administered at dinnertime to a patient in the fed state.
Inventor(s):	Xiu Xiu Cheng, Chih-Ming Chen, Steve Jan, Joseph Chou
Assignee:	Andrx Laboratories LLC
Application Number:	US09/705,625
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for patent 6,790,459
Patent Claim Types: see list of patent claims	Use; Composition; Dosage form;

Drugs Protected by US Patent 6,790,459

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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 6,790,459

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Australia	2005239716	⤷ Start Trial
Australia	3083002	⤷ Start Trial
Brazil	0115390	⤷ Start Trial
Canada	2427195	⤷ Start Trial
Canada	2564750	⤷ Start Trial
European Patent Office	1335708	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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