Patent No. EP2654989 (titled "Casting Device For A Piston For An Internal Combustion Engine And Method For Opening And/Or Closing A Casting Device") was filed by Federal Mogul Nrnberg on Nov 18, 2011. The application was issued on Mar 4, 2015.

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 |
|---|---|---|
| KS KOLBENSCHMIDT | Dec 4, 2015 | GREIF |
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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