Patent No. EP3319543 (titled "Dental Materials Using Thermoset Polymers") was filed by Align Technology on Jul 7, 2016. The application was issued on Aug 21, 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 |
|---|---|---|
| VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB | May 22, 2020 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
| HENKEL | May 19, 2020 | - |
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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