Patent No. EP3216992 (titled "Mixer") was filed by Eberspcher Exhaust Technology on Mar 6, 2017. The application was issued on Oct 31, 2018.
A mixer for exhaust gas and reactant in an internal combustion engine exhaust system, comprising a mixer body with a reactant receiving channel, exhaust gas inlet openings, and at least one discharge channel. The mixer body has a flow deflection region between the discharge channels to enhance mixing, and multiple outlet openings for exhaust gas and reactant mixture discharge. The exhaust gas inlet openings are arranged in multiple wall regions of the mixer body to allow for multi-point gas entry. The mixer body is constructed from two plate-like parts connected together.

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 |
|---|---|---|
| FAURECIA SYSTEMES DECHAPPEMENT | Jul 30, 2019 | LAVOIX |
| TENNECO | Jul 30, 2019 | WAGNER & GEYER |
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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