Last Updated: September 24, 2026

Details for Patent: 7,056,500

Name: Drug Patent Intelligence for US Patent 7056500
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Summary for Patent: 7,056,500

Title:	Polymer conjugates of opioid antagonists
Abstract:	The invention provides polymer conjugates of opioid antagonists comprising a polymer, such as poly(ethylene glycol), covalently attached to an opioid antagonist. The linkage between the polymer and the opioid antagonist is preferably hydrolytically stable. The invention also includes a method of treating one or more side effects associated with the use of opioid analgesics, such as constipation, nausea, or pruritus, by administering a polymer conjugate of the invention.
Inventor(s):	Michael David Bentley, Michael James Roberts, Xiaoming Shen, Lin Cheng
Assignee:	Nektar Therapeutics
Application Number:	US10/274,296
Patent Claim Types: see list of patent claims	Use; Composition; Delivery;

Drugs Protected by US Patent 7,056,500

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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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Australia	2002360284	⤷ Start Trial
Canada	2463938	⤷ Start Trial
Cyprus	1117608	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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