Last Updated: November 9, 2026

Details for Patent: 8,846,072

Name: Drug Patent Intelligence for US Patent 8846072
Creator: DrugPatentWatch
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Summary for Patent: 8,846,072

Title:	Controlled delivery system
Abstract:	The present invention relates to novel anesthetic compositions containing a non-polymeric carrier material and an anesthetic, where the compositions are suitable for providing a sustained local anesthesia without an initial burst and having a duration for about 24 hours or longer. Certain compositions are also provided that include a first anesthetic and a second anesthetic. In such compositions, the second anesthetic is a solvent for the first anesthetic and provides an initial anesthetic effect upon administration to a subject. The non-polymeric carrier may optionally be a high viscosity liquid carrier material such as a suitable sugar ester. The compositions can further include one or more additional ingredients including active and inactive materials. Methods of using the compositions of the invention to produce a sustained anesthetic effect at a site in a subject are also provided.
Inventor(s):	A. Neil Verity
Assignee:	Durect Corp
Application Number:	US13/789,416
Patent Claim Types: see list of patent claims	Use; Composition; Dosage form;

Drugs Protected by US Patent 8,846,072

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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

International Family Members for US Patent 8,846,072

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	E537844	⤷ Start Trial
Australia	2005287175	⤷ Start Trial
Brazil	PI0515372	⤷ Start Trial
Canada	2581287	⤷ Start Trial
China	101035562	⤷ Start Trial
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