Patent No. EP2852371 (titled "Cosmetic Compositions Comprising Magnetosomes And Uses Thereof") was filed by Natura Bisse on May 20, 2013. The application was issued on Dec 13, 2017.

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 |
|---|---|---|
| WITTOP KONING | Sep 12, 2018 | JORGET |
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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