Patent No. EP1797886 (titled "Immune Stimulation Using Chemically Modified Rna") was filed by Curevac on Jul 3, 2003. The application was issued on Jul 10, 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 |
|---|---|---|
| KONIG SZYNKA TILMANN VON RENESSE | Apr 14, 2020 | HOFFMANN EITLE |
| WEINZIERL, GERHARD | Apr 9, 2020 | SCHIWECK WEINZIERL KOCH PATENTANWALTE PARTNERSCHAFT MBB |
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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