Last Updated: August 10, 2026

Details for Patent: 8,236,766


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Which drugs does patent 8,236,766 protect, and when does it expire?

Patent 8,236,766 protects KORSUVA and is included in one NDA.

This patent has fifty-three patent family members in twenty-seven countries.

Summary for Patent: 8,236,766
Title:Uses of synthetic peptide amides
Abstract:The invention relates to synthetic peptide amides that are ligands of the kappa opioid receptor and particularly to agonists of the kappa opioid receptor that exhibit low P450 CYP inhibition and low penetration into the brain. The synthetic peptide amides of the invention conform to the structure: wherein Xaa is a D-amino acid and G is selected from the following three groups: The compounds are useful in the prophylaxis and treatment of pain, pruritus and inflammation associated with a variety of diseases and conditions.
Inventor(s):Claudio D. Schteingart, Frederique Menzaghi, Guangcheng Jiang, Roberta Vezza Alexander, Javier Sueiras-Diaz, Robert H. Spencer, Derek T. Chalmers, Zhiyong Luo
Assignee: Vifor Fresenius Medical Care Renal Pharma Ltd
Application Number:US12/480,059
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,236,766
Patent Claim Types:
see list of patent claims
Use; Composition;
Patent landscape, scope, and claims:

error: insufficient information

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Drugs Protected by US Patent 8,236,766

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Vifor Intl KORSUVA difelikefalin acetate SOLUTION;INTRAVENOUS 214916-001 Aug 23, 2021 RX Yes Yes ⤷  Start Trial ⤷  Start Trial TREATMENT OF MODERATE-TO-SEVERE PRURITUS ASSOCIATED WITH CHRONIC KIDNEY DISEASE (CKD-AP) IN ADULTS UNDERGOING HEMODIALYSIS (HD) ⤷  Start Trial
>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 8,236,766

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 2064228 ⤷  Start Trial 301199 Netherlands ⤷  Start Trial
European Patent Office 2064228 ⤷  Start Trial CA 2022 00045 Denmark ⤷  Start Trial
European Patent Office 2064228 ⤷  Start Trial PA2022522 Lithuania ⤷  Start Trial
European Patent Office 2064228 ⤷  Start Trial LUC00282 Luxembourg ⤷  Start Trial
European Patent Office 2064228 ⤷  Start Trial 2022C/546 Belgium ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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