Patent No. EP2830447 (titled "Cleaning System For Drum Conveyor Of Apparatus For Feeding Filter Segments To Multi-Segment Filter Manufacturing Apparatus And Method Of Cleaning Of Drum Conveyor") was filed by Philip Morris on Mar 13, 2013. The application was issued on May 11, 2022.

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 |
|---|---|---|
| HAUNI MASCHINENBAU | Nov 24, 2016 | SEEMANN & PARTNER PATENTANWALTE MBB |
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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