Patent No. EP3225230 (titled "Octocrylene-Free Sunscreen Agent Comprising Diethylhexylbutamidotriazone") was filed by Beiersdorf on May 3, 2016. The application was issued on Jul 17, 2019.

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 |
|---|---|---|
| MIBELLE | Apr 17, 2020 | HEPP WENGER RYFFEL |
| L'OREAL | Apr 16, 2020 | CABINET NONY |
| L'OREAL | Apr 16, 2020 | IPSILON |
| SCHIWECK WEINZIERL KOCH PATENTANWALTE PARTNERSCHAFT MBB | Apr 16, 2020 | SCHIWECK WEINZIERL KOCH |
| SCHIWECK WEINZIERL KOCH PATENTANWALTE PARTNERSCHAFT MBB | Apr 16, 2020 | SCHIWECK WEINZIERL KOCH PATENTANWALTE PARTNERSCHAFT MBB |
| DSM NUTRITIONAL PRODUCTS | Apr 15, 2020 | KRAUS & LEDERER |
| DSM NUTRITIONAL PRODUCTS | Apr 15, 2020 | KRAUS & LEDERER PARTGMBB |
| EMIL KIESSLING | Apr 15, 2020 | HERZOG PATENTANWALTS |
| DALLI WERKE | Mar 19, 2020 | 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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