Patent No. EP3256100 (titled "Cosmetic Composition Containing Linear Olefin Sulfonates, Non-Oxyalkylated Anionic Surfactants, And Non-Ionic And/Or Amphoteric Surfactants, And Cosmetic Treatment Method") was filed by L'Oreal on Dec 7, 2015. The application was issued on Jun 29, 2022.

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.
| Company | Opposition Date | Representative |
|---|---|---|
| THE PROCTER & GAMBLE | Mar 29, 2023 | ARCH |
| KAO GERMANY | Mar 28, 2023 | MILLER |
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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