Patent No. EP3727287 (titled "Hair Dyeing Process Comprising A Step Of Dyeing With Henna And/Or Indigo And A Treatment Step Comprising The Application Of A Composition Comprising A Buffer System") was filed by L'Oreal on Dec 21, 2018. The application was issued on Dec 4, 2024.

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.
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.
Date
Description
Get instant alerts for new documents