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The patent EP3294285 was granted to Aventis Pharma on Dec 18, 2019. The application was filed on May 12, 2016 under application number EP16721844A. The patent is currently recorded with a legal status of "Revoked".

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 | Opposition Status |
|---|---|---|---|
| MEDAC GESELLSCHAFT FUR KLINISCHE SPEZIALPRAPARATE | Sep 18, 2020 | UEXKULL & STOLBERG | ADMISSIBLE |
| ZENTIVA | Sep 18, 2020 | GREINER | ADMISSIBLE |
| STADA ARZNEIMITTEL | Sep 17, 2020 | HAMM & WITTKOPP | ADMISSIBLE |
| GENERICS UK | Sep 16, 2020 | TER MEER STEINMEISTER & PARTNER | ADMISSIBLE |
| DR REDDYS LABORATORIES BETAPHARM ARZNEIMITTEL | Aug 26, 2020 | WUNSCHE | ADMISSIBLE |
| FRESENIUS KABI DEUTSCHLAND | Jul 9, 2020 | - | ADMISSIBLE |
| HEXAL | Jul 1, 2020 | MAIWALD | ADMISSIBLE |
| TEVA PHARMACEUTICALS | Jun 9, 2020 | LEDERER & KELLER PATENTANWALTE PARTNERSCHAFT MBB | WITHDRAWN |
| ACCORD HEALTHCARE | Jun 3, 2020 | AERA | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0817779 |
| DESCRIPTION | US5847170 |
| DESCRIPTION | WO2005028462 |
| DESCRIPTION | WO9630355 |
| OPPOSITION | WO2011051894 |
| OPPOSITION | WO2016180943 |
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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Dec 16, 2017
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Description
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