Patent No. EP1996166 (titled "Crush-Resistant Tablets Intended To Prevent Accidental Misuse And Unlawful Diversion") was filed by Ethypharm on Mar 1, 2007. The application was issued on Oct 5, 2016.

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 |
|---|---|---|
| HERTIN UND PARTNER RECHTS | Jul 4, 2017 | HERTIN UND PARTNER RECHTS UND PATENTANWALTE PARTG MBB |
| GREINER | Jul 3, 2017 | ELKINGTON AND FIFE |
| G L PHARMA | Jun 19, 2017 | KESCHMANN |
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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