Patent No. EP2438903 (titled "Preservative-Free Sunscreen") was filed by Beiersdorf on Sep 23, 2011. The application was issued on Mar 14, 2018.

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 |
|---|---|---|
| L'OREAL | Dec 14, 2018 | CABINET NONY |
| L'OREAL | Dec 14, 2018 | IPSILON |
| STADA ARZNEIMITTEL | Dec 11, 2018 | HAMM & WITTKOPP |
| DALLI WERKE | Dec 6, 2018 | F & E PATENT |
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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