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The patent EP3562911 was granted to Ecochem on Sep 17, 2025. The application was filed on Jan 2, 2018 under application number EP18700135A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".
A fire retardant composition for wood composite panels that maintains compatibility with the resin used in production. The composition comprises a fire retardant agent, a pH regulating compound, and optionally a smoke suppressing agent, with a pH range of 3.5-8.5 in a 10% aqueous solution. The pH is specifically chosen based on the type of resin used, allowing for optimal performance without compromising the resin's functionality.

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 |
|---|---|---|---|
| BURNBLOCK HOLDING APS | Mar 8, 2023 | PATRADE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP2586849 |
| DESCRIPTION | US4725382 |
| DESCRIPTION | US8715540 |
| DESCRIPTION | WO02102926 |
| INTERNATIONAL-SEARCH-REPORT | US4725382 |
| INTERNATIONAL-SEARCH-REPORT | WO02102926 |
| OPPOSITION | US2002115774 |
| OPPOSITION | US2008265223 |
| OPPOSITION | WO2012143762 |
| OPPOSITION | WO2012143907 |
| OPPOSITION | WO2015061905 |
| OPPOSITION | WO2015155546 |
| OPPOSITION | WO2015187414 |
| OPPOSITION | WO8601457 |
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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Decision to grant a European patent
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(Electronic) Receipt
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May 2, 2022
Filing of the translations of the claims
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May 2, 2022
French translation of claims
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May 2, 2022
German translation of the claims
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May 2, 2022
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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(Electronic) Receipt
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Abstract
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Amended description with annotations
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Letter accompanying subsequently filed items
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Annex to the communication
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Communication from the Examining Division
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(Electronic) Receipt
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Amended claims with annotations
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Letter accompanying subsequently filed items
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Letter accompanying subsequently filed items
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Annex to the communication
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Communication from the Examining Division
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Examination started
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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Apr 6, 2020
Request for further processing
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Mar 30, 2020
Claim deemed abandoned
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Amended claims with annotations
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Amendments received before examination
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Letter accompanying subsequently filed items
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Priority search results copy provided by EPO
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(Electronic) Receipt
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Jul 30, 2019
Request for entry into the European phase
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Information on entry into European phase
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Copy of the international search report
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Jul 5, 2018
Published international application - A1
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