Patent No. EP4458456 (titled "Ceramic Membrane Filtration Assembly With Sealing Device And Related Methods") was filed by Nanostone Water on Jul 21, 2017. The application was issued on Jun 18, 2025.

The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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