Coated Membrane For Water Electrolysis

Patent No. EP4267781 (titled "Coated Membrane For Water Electrolysis") was filed by Greenerity on Dec 22, 2021. The application was issued on Oct 1, 2025.

Patent Summary

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Patent Family

Patent Oppositions (3)

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
JOHNSON MATTHEY HYDROGENJun 26, 2026JOHNSON MATTHEY PUBLIC
STRAWMANJun 24, 2026HOFFMANN EITLE
SIEMENS ENERGYJun 23, 2026-

Dossier Documents

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EP4267781

GREENERITY
Application Number
EP21835338A
Filing Date
Dec 22, 2021
Status
Granted And Under Opposition
Aug 29, 2025
Publication Date
Oct 1, 2025