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The patent EP3231605 was granted to Nitto Denko on Mar 5, 2025. The application was filed on Dec 10, 2015 under application number EP15867891A. 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 |
|---|---|---|---|
| FITESA GERMANY | Feb 9, 2022 | VAN WIJK | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JP2003311884 |
| INTERNATIONAL-SEARCH-REPORT | JP2008001104 |
| INTERNATIONAL-SEARCH-REPORT | JP2009519844 |
| INTERNATIONAL-SEARCH-REPORT | JPH03128234 |
| INTERNATIONAL-SEARCH-REPORT | JPH0694188B |
| OPPOSITION | JP2003311884 |
| OPPOSITION | US2006062980 |
| OPPOSITION | US2007254176 |
| OPPOSITION | US2008045917 |
| OPPOSITION | US2014330236 |
| OPPOSITION | US4880682 |
| OPPOSITION | US5057097 |
| OPPOSITION | US5501679 |
| SEARCH | US2008045917 |
| SEARCH | US2011203728 |
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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Mar 30, 2021
Filing of the translations of the claims
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Mar 30, 2021
French translation of claims
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Mar 30, 2021
German translation of the claims
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Mar 30, 2021
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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Jul 22, 2020
Amended claims with annotations
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Jul 22, 2020
Amended description with annotations
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Jul 22, 2020
Claims
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Description
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Letter accompanying subsequently filed items
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Annex to the communication
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Mar 27, 2020
Communication from the Examining Division
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Mar 24, 2020
Examination started
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Oct 30, 2018
(Electronic) Receipt
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Amended claims with annotations
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Oct 30, 2018
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Oct 30, 2018
Letter accompanying subsequently filed items
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Apr 30, 2018
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European search opinion
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Apr 11, 2018
Information on Search Strategy
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Apr 11, 2018
Supplementary European search report
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Apr 3, 2018
Search started
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Sep 20, 2017
Notification of forthcoming publication
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Sep 6, 2017
Refund of fees
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Amended claims with annotations
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Aug 25, 2017
Amendments received before examination
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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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Jun 27, 2017
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Payment of fees and costs
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Jun 13, 2017
Abstract
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Jun 13, 2017
Claims
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Jun 13, 2017
Description
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Jun 13, 2017
Drawings
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Jun 13, 2017
Request for entry into the European phase
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Jun 13, 2017
Request for grant of a European patent
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Apr 21, 2017
Information on entry into European phase
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Copy of the international search report
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International publication pamphlet
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