Patent No. EP2282978 (titled "Lithium Silicate Glass Ceramic And Method For Fabrication Of Dental Appliances") was filed by James R Glidewell Dental Ceramics on Apr 10, 2009. The application was issued on Sep 19, 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 |
|---|---|---|
| IVOCLAR VIVADENT | Jun 19, 2019 | UEXKULL & STOLBERG |
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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