Patent No. EP3838369 (titled "Lifting System For A Filter Press And A Method Of Automatically Lifting One Or More Filter Support Members From A Filter Press") was filed by Metso Outotec Finland on Dec 19, 2019. The application was issued on Oct 22, 2025.

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 |
|---|---|---|
| DIEMME FILTRATION | Sep 27, 2023 | CORRADINI |
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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