Patent No. EP3003601 (titled "Feeder Sleeve, Forming Element For The Feeder Sleeve And Method For Casting Metal Using The Same") was filed by Chemex on May 27, 2014. The application was issued on Sep 27, 2023.

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 |
|---|---|---|
| ASK CHEMICALS | May 16, 2018 | SCHUPFNER |
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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