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The patent EP3168326 was granted to Okuno Chemical Industries on Sep 20, 2023. The application was filed on Apr 24, 2015 under application number EP15819437A. 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 |
|---|---|---|---|
| MACDERMID | Apr 28, 2021 | PAGE WHITE FARRER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JP2001059195 |
| INTERNATIONAL-SEARCH-REPORT | JP2005504178 |
| INTERNATIONAL-SEARCH-REPORT | JP2010138434 |
| INTERNATIONAL-SEARCH-REPORT | WO2008143190 |
| OPPOSITION | EP2149622 |
| OPPOSITION | JP2001059195 |
| OPPOSITION | JP2003013244 |
| OPPOSITION | JP4649817B |
| OPPOSITION | US2005109734 |
| OPPOSITION | US2009092757 |
| OPPOSITION | US2012305406 |
| OPPOSITION | US2013186862 |
| OPPOSITION | US2014091052 |
| OPPOSITION | US2185858 |
| OPPOSITION | US3891741 |
| OPPOSITION | US8603352 |
| OPPOSITION | WO2013083600 |
| OPPOSITION | WO2013112268 |
| OPPOSITION | WO2013135862 |
| OPPOSITION | WO2013135863 |
| OPPOSITION | WO2013135864 |
| OPPOSITION | WO8204072 |
| SEARCH | EP1959029 |
| SEARCH | EP2149622 |
| SEARCH | JP2002363761 |
| SEARCH | US3891741 |
| SEARCH | US4448811 |
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
Search/Exam
Jun 16, 2020
(Electronic) Receipt
Search/Exam
Jun 16, 2020
Filing of the translations of the claims
Search/Exam
Jun 16, 2020
French translation of claims
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German translation of the claims
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Letter accompanying subsequently filed items
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Intention to grant (signatures)
Search/Exam
Feb 19, 2020
Text intended for grant (clean copy)
Search/Exam
Feb 19, 2020
Oct 25, 2019
Amended description with annotations
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Oct 25, 2019
Description
Search/Exam
Oct 25, 2019
Sep 26, 2019
Annex to the communication
Search/Exam
Sep 26, 2019
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Amended claims with annotations
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May 9, 2019
Claims
Search/Exam
May 9, 2019
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Annex to the communication
Search/Exam
Jan 17, 2019
Communication from the Examining Division
Search/Exam
Jan 11, 2019
Examination started
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Sep 19, 2018
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Amended claims with annotations
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Sep 19, 2018
Amendments received before examination
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Mar 20, 2018
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European search opinion
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Mar 1, 2018
Information on Search Strategy
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Mar 1, 2018
Supplementary European search report
Search/Exam
Jan 18, 2018
Letter concerning fees and payments
Search/Exam
Jan 4, 2018
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Information on Search Strategy
Search/Exam
Jan 4, 2018
Partial European search report
Search/Exam
Jan 4, 2018
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Search started
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Jul 31, 2017
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Amended claims with annotations
Search/Exam
Jul 31, 2017
Amendments received before examination
Search/Exam
Jun 30, 2017
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Apr 20, 2017
Notification of forthcoming publication
Search/Exam
Feb 22, 2017
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Communication to designated inventor
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Feb 20, 2017
Communication to designated inventor
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Feb 20, 2017
Communication to designated inventor
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Feb 2, 2017
Payment of fees and costs
Search/Exam
Feb 1, 2017
Abstract
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Feb 1, 2017
Claims
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Feb 1, 2017
Description
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Feb 1, 2017
Request for entry into the European phase
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Feb 1, 2017
Request for grant of a European patent
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Nov 18, 2016
Information on entry into European phase
Search/Exam
Feb 1, 2016
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Copy of the international search report
Search/Exam
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International publication pamphlet
Search/Exam