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Crystalline Solid Forms Of 6-Carboxy-2-(3,5-Dichlorophenyl)-Benzoxazole

Patent No. EP3191461 (titled "Crystalline Solid Forms Of 6-Carboxy-2-(3,5-Dichlorophenyl)-Benzoxazole") was filed by Pfizer on Aug 31, 2015. The application was issued on Nov 3, 2021.

Patent Summary

Identification and characterization of crystalline forms of the compound 6-carboxy-2-(3,5-dichlorophenyl)-benzoxazole. The forms are distinguished by their powder X-ray diffraction patterns, Raman spectra, IR spectra, and solid state NMR spectra. Form 1 is non-hygroscopic and anhydrous, with a unique combination of peaks in these analytical techniques. The disclosure also provides methods for preparing and using these forms.

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Patent Family

Patent Oppositions (7)

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
ALFRED E TIEFENBACHERAug 3, 2022AERA
ALFRED E TIEFENBACHERAug 3, 2022BARDEHLE PAGENBERG SL
GALENICUM HEALTH SLUAug 3, 2022GALENICUM HEALTH SLU
HOLLATZAug 3, 2022TER MEER STEINMEISTER & PARTNER
KELTIEAug 3, 2022MOORE
QUIMICA SINTETICAAug 3, 2022AERA
QUIMICA SINTETICAAug 3, 2022BARDEHLE PAGENBERG SL

Dossier Documents

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EP3191461

PFIZER
Application Number
EP15771276A
Filing Date
Aug 31, 2015
Status
Granted And Under Opposition
Oct 1, 2021
Publication Date
Nov 3, 2021
External Links
Slate, Register , Google Patents