Patent No. EP4392141 (titled "Method For Dyeing Keratinous Material, In Particular Human Hair") was filed by Henkel on Jul 12, 2022. The application was issued on Sep 3, 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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