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The patent EP3117724 was granted to Daicel on Apr 2, 2025. The application was filed on Mar 13, 2014 under application number EP14885125A. 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 |
|---|---|---|---|
| EASTMAN CHEMICAL | Feb 10, 2020 | WALLINGER RICKER SCHLOTTER TOSTMANN | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JP2008504456 |
| INTERNATIONAL-SEARCH-REPORT | JP2928340B |
| INTERNATIONAL-SEARCH-REPORT | JP3532689B |
| INTERNATIONAL-SEARCH-REPORT | JP5289954B |
| OPPOSITION | EP2932860 |
| OPPOSITION | US2013112214 |
| OPPOSITION | US3080611 |
| OPPOSITION | US5512230 |
| OPPOSITION | WO2013042609 |
| SEARCH | GB1042064 |
| SEARCH | US2011108044 |
| SEARCH | US2013115452 |
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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Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
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Appeal
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Notice of appeal
Appeal
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(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
Feb 14, 2019
(Electronic) Receipt
Search/Exam
Feb 14, 2019
French translation of claims
Search/Exam
Feb 14, 2019
German translation of the claims
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Feb 14, 2019
Letter accompanying subsequently filed items
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Oct 31, 2018
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Intention to grant (signatures)
Search/Exam
Oct 31, 2018
Text intended for grant (clean copy)
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Oct 5, 2018
Examination started
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Jul 18, 2018
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Amendments received before examination
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Jan 8, 2018
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European search opinion
Search/Exam
Dec 15, 2017
Information on Search Strategy
Search/Exam
Dec 15, 2017
Supplementary European search report
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Dec 5, 2017
Search started
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Dec 21, 2016
Notification of forthcoming publication
Search/Exam
Nov 11, 2016
Oct 31, 2016
Communication to designated inventor
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Oct 31, 2016
Communication to designated inventor
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Oct 12, 2016
(Electronic) Receipt
Search/Exam
Oct 12, 2016
Abstract
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Claims
Search/Exam
Oct 12, 2016
Description
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Oct 12, 2016
Drawings
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Oct 12, 2016
Matter concerning the application
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Oct 12, 2016
Request for entry into the European phase
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Sep 27, 2016
Comments on Written Opinion of ISA
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Information on entry into European phase
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Jan 4, 2016
Notification of the recording of a change
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Copy of the international search report
Search/Exam
Sep 17, 2015
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International publication pamphlet
Search/Exam