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High-Purity Quinoline Derivative And Method For Manufacturing Same

Patent No. EP3524595 (titled "High-Purity Quinoline Derivative And Method For Manufacturing Same") was filed by Eisai R&D Management on Aug 26, 2015. The application was issued on Aug 10, 2022.

Patent Summary

Quinline derivative that is easy to remove such impurities by a common purification method such as chromatography and crystallization. The derivative comprises a compound represented by formula (IV) or a salt thereof; an organometallic reagent such as butyllithium, methyllithium, lithium bistrimethylsilylamide, sodium bistrimethylsilylamide or potassium bistrimethylsilylamide; a hydride such as lithium hydride, sodium hydride or potassium hydride; a heterocyclic compound such as imidazole, pyridine, dimethylpyridine, trimethylpyridine or 4-dimethylaminopyridine; or an organic amine such as triethylamine, N,N-diisopropylethylamine or diazabicycloundecene.

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Patent Family

Patent Oppositions (9)

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.

CompanyOpposition DateRepresentative
ACCORD HEALTHCAREMay 10, 2023UEXKULL & STOLBERG
AECHTERMay 10, 2023TER MEER STEINMEISTER & PARTNER
GENERICS UKMay 10, 2023RUSSELL
MAIWALDMay 10, 2023MAIWALD
STADA ARZNEIMITTELMay 10, 2023HAMM & WITTKOPP
WELDINGMay 10, 2023HAMM & WITTKOPP
HANSENMay 9, 2023MAIWALD
TEVA PHARMACEUTICALSMay 9, 2023KRAUS & LEDERER PARTGMBB
ELKINGTON AND FIFEMay 4, 2023ELKINGTON AND FIFE

Dossier Documents

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EP3524595

EISAI R&D MANAGEMENT
Application Number
EP19151846A
Filing Date
Aug 26, 2015
Status
Granted And Under Opposition
Jul 8, 2022
Publication Date
Aug 10, 2022
External Links
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