Patent No. EP1574215 (titled "Solid Drug For Oral Use") was filed by Kissei Pharmaceutical on Dec 11, 2003. The application was issued on Jul 15, 2015.

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 |
|---|---|---|
| ALFRED E TIEFENBACHER | Apr 14, 2016 | HERTIN UND PARTNER RECHTS UND PATENTANWALTE PARTG MBB |
| GENERICS UK | Apr 14, 2016 | TER MEER UND PARTNER |
| TEVA PHARMACEUTICAL INDUSTRIES LTD | Apr 14, 2016 | SCHIENER |
| OSER | Apr 13, 2016 | PRUFER & PARTNER MBB PATENTANWALTE RECHTSANWALTE |
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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