Patent No. EP2796189 (titled "Two-Shaft Reactor/Mixer And System That Consists Of An End Plate For A Reactor/Mixer And A Discharge Screws Connection Block") was filed by Buss SMS Canzler on Apr 26, 2013. The application was issued on Dec 25, 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 |
|---|---|---|
| LIST TECHNOLOGY | Aug 30, 2017 | PATENTANWALTE UND RECHTSANWALT WEISS |
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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