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Composition Made From Poly(Arylene-Ether-Ketone) (Paek) Stable In A Molten State

Patent No. EP3325535 (titled "Composition Made From Poly(Arylene-Ether-Ketone) (Paek) Stable In A Molten State") was filed by Arkema France on Jul 21, 2016. The application was issued on Oct 14, 2020.

Patent Summary

A composition based on polyarylene ether-ketone (PAEK) stable in the molten state, comprising a PAEK polymer and an organometallic phosphate salt as a stabilizer. The phosphate salt, such as sodium phosphate 2,2'-methylene-bis-(4,6-di-tert-butylphenyl), prevents degradation of the PAEK polymer during processing at high temperatures, particularly in air, by inhibiting thermo-oxidation reactions.

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Patent Oppositions (5)

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
EVONIK OPERATIONSJul 14, 2021GODEMEYER BLUM LENZE PATENTANWALTE PARTNERSCHAFT MBB WERKPATENT
SOLVAY SPECIALTY POLYMERS USAJul 13, 2021FERRI
SYENSQO SPECIALTY POLYMERS USAJul 13, 2021FERRI
VICTREX MANUFACTURINGJul 9, 2021GURUN
VICTREX MANUFACTURINGJul 9, 2021SLINGSBY PARTNERS

Dossier Documents

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EP3325535

ARKEMA FRANCE
Application Number
EP16757296A
Filing Date
Jul 21, 2016
Status
Granted And Under Opposition
Sep 11, 2020
Publication Date
Oct 14, 2020
External Links
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