Patent No. EP3391890 (titled "Posaconazole Intravenous Solution Formulations Stabilized By Substituted Beta-Cyclodextrin") was filed by Merck Sharp & Dohme on Jun 24, 2011. The application was issued on Aug 25, 2021.

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 |
|---|---|---|
| ETHYPHARM | May 25, 2022 | LLR |
| FRESENIUS KABI DEUTSCHLAND | May 25, 2022 | FRESENIUS KABI DEUTSCHLAND |
| GENERICS UK | May 25, 2022 | ELKINGTON AND FIFE |
| AERA | May 25, 2022 | AERA |
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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