Patent No. EP1591105 (titled "Use Of Antioxidants For The Preparation Of Pharmaceutical Or Cosmetic Compositions For Protecting The Skin From Damages By Infrared-Radiations") was filed by Stada Arzneimittel on Mar 15, 2005. The application was issued on May 27, 2020.

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 |
|---|---|---|
| MERCK PATENT | Feb 26, 2021 | - |
| DM DROGERIE MARKT | Feb 24, 2021 | LBP LEMCKE |
| MIBELLE | Feb 5, 2021 | BREMI |
| EMIL KIESSLING | Aug 6, 2020 | HERZOG PATENTANWALTS |
| DALLI WERKE | Jul 9, 2020 | F & E PATENT |
| SYMRISE | Jul 7, 2020 | EISENFUHR SPEISER |
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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