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The patent EP3838369 was granted to Metso Outotec Finland on Oct 22, 2025. The application was filed on Dec 19, 2019 under application number EP19218274A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 | Opposition Status |
|---|---|---|---|
| DIEMME FILTRATION | Sep 27, 2023 | CORRADINI | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| SEARCH | CN105413268 |
| SEARCH | DE2715781 |
| SEARCH | JPS54105370 |
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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Description
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Decision to grant a European patent
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Nov 25, 2022
(Electronic) Receipt
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Nov 25, 2022
French translation of claims
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Nov 25, 2022
German translation of the claims
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Nov 25, 2022
Letter accompanying subsequently filed items
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(Electronic) Receipt
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Oct 18, 2022
Annexes in respect of a client data request
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Annexes in respect of a client data request
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Annexes in respect of a client data request
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Letter accompanying subsequently filed items
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Oct 18, 2022
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Intention to grant (signatures)
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Sep 1, 2022
Text intended for grant (clean copy)
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Examination started
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Document concerning representation
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Document concerning representation
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Nov 29, 2021
(Electronic) Receipt
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Amended claims with annotations
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Amended description with annotations
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Nov 29, 2021
Amendments received before examination
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Nov 29, 2021
Letter accompanying subsequently filed items
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Jun 28, 2021
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Notification of forthcoming publication
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European search opinion
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European search report
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Apr 22, 2020
Information on Search Strategy
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Search started
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Feb 11, 2020
Communication to designated inventor
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Communication to designated inventor
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Dec 19, 2019
Abstract
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Dec 19, 2019
Dec 19, 2019
Claims
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Dec 19, 2019
Description
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Dec 19, 2019
Designation of inventor
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Dec 19, 2019
Drawings
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Dec 19, 2019
Request for grant of a European patent
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