Patent No. EP4326223 (titled "Anhydrous Agent For Dyeing Keratinous Material, In Particular Human Hair, Containing Amino Silicones, Pigments And Particular Alkylene Glycols") was filed by Henkel on Mar 28, 2022. The application was issued on Aug 6, 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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