Patent No. EP3656530 (titled "Connecting Device For Connecting A Screw-Type Machine With A Gear Box And A Method For Cleaning Such A Connecting Device") was filed by Coperion on Nov 21, 2018. The application was issued on Aug 3, 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 |
|---|---|---|
| LEISTRITZ EXTRUSIONSTECHNIK | Apr 19, 2023 | LINDNER BLAUMEIER PATENT UND RECHTSANWALTE |
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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