Patent No. EP2323617 (titled "Hyaluronic Acid-Based Gels Including Anesthetic Agents") was filed by Allergan Industrie on Mar 2, 2009. The application was issued on Jan 18, 2017.

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 |
|---|---|---|
| NESTLE SKIN HEALTH | Oct 18, 2017 | AERA |
| LABORATOIRES VIVACY | Oct 17, 2017 | TRIPOZ |
| TEOXANE | Oct 17, 2017 | CABINET NUSS |
| MERZ PHARMA | Oct 13, 2017 | WALLINGER RICKER SCHLOTTER TOSTMANN |
| HEINEKING, NILS | Oct 2, 2017 | DIEHL & PARTNER |
| FARCO-PHARMA GMBH | Sep 27, 2017 | VON ROHR PATENTANWALTE PARTNERSCHAFT MBB |
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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