Patent No. EP2121219 (titled "Method For Processing, In Particular Casting, A Material, Casting Mould For Carrying Out The Method And Articles Produced By The Method Or In The Casting Mould") was filed by KSM Castings on Dec 4, 2007. The application was issued on May 29, 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 |
|---|---|---|
| NEMAK EUROPE | Jun 2, 2016 | COHAUSZ & FLORACK |
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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