Patent No. EP3322487 (titled "Magnolia Bark Extract As A Hydrophobic Ligand For Preferential Removal Of Gram Negative Bacteria From The Oral Cavity") was filed by WM Wrigley JR on Jul 14, 2016. The application was issued on Nov 5, 2025.

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 |
|---|---|---|
| PERFETTI VAN MELLE | Oct 6, 2021 | BIANCHETTI & MINOJA WITH TREVISAN & CUONZO IPS |
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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