Patent No. EP2981520 (titled "New Process For The Synthesis Of 1-(2-((2,4-Dimethylphenyl)Thio)Phenyl)Piperazine") was filed by LEK Pharmaceuticals DD on Apr 4, 2014. The application was issued on Mar 6, 2019.

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 |
|---|---|---|
| HGF | Dec 6, 2019 | HGF |
| DIPHARMA FRANCIS | Dec 5, 2019 | BIANCHETTI & MINOJA WITH TREVISAN & CUONZO IPS |
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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