Patent No. EP1989182 (titled "Crystalline Form Of The Arginine Salt Of Perindopril, Process For Preparing It, And Pharmaceutical Compositions Comprising It") was filed by LES LABORATOIRES SERVIER on Feb 26, 2007. The application was issued on Apr 13, 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 |
|---|---|---|
| STRAWMAN | Jan 13, 2017 | D YOUNG |
| LEK PHARMACEUTICALS DD | Jan 12, 2017 | 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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