Patent No. EP3132217 (titled "Sintering Furnace For Components Made Of Sintered Material, In Particular Dental Components") was filed by Sirona Dental Systems on Feb 12, 2015. The application was issued on Apr 4, 2018.

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 |
|---|---|---|
| DEKEMA DENTAL KERAMIKOFEN | Jan 3, 2019 | MANITZ FINSTERWALD PATENT UND RECHTSANWALTSPARTNERSCHAFT MBB |
| IVOCLAR VIVADENT | Jan 2, 2019 | SPLANEMANN |
| AMANN GIRRBACH | Dec 7, 2018 | TORGGLER & HOFMANN PATENTANWALTE RANKWEIL |
| AMANN GIRRBACH | Dec 7, 2018 | TORGGLER & HOFMANN RANKWEIL |
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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