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The patent EP2833415 was granted to Mitsui Chemicals on May 2, 2018. The application was originally filed on Mar 13, 2013 under application number EP13767543A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2005314680 |
| DESCRIPTION | JP2006077261 |
| DESCRIPTION | JP2008231265 |
| DESCRIPTION | JP2008308619 |
| DESCRIPTION | JP2010258439 |
| DESCRIPTION | JPH01501950 |
| DESCRIPTION | JPH01502036 |
| DESCRIPTION | JPH03179005 |
| DESCRIPTION | JPH03179006 |
| DESCRIPTION | JPH03207703 |
| DESCRIPTION | JPH03207704 |
| DESCRIPTION | US5321106 |
| INTERNATIONAL-SEARCH-REPORT | JP2010258439 |
| INTERNATIONAL-SEARCH-REPORT | JP2012186247 |
| INTERNATIONAL-SEARCH-REPORT | JPH0726079 |
| INTERNATIONAL-SEARCH-REPORT | WO0024822 |
| OPPOSITION | EP2626911 |
| OPPOSITION | EP2637217 |
| OPPOSITION | JP2012038856 |
| OPPOSITION | US2005215737 |
| OPPOSITION | US2012000514 |
| OPPOSITION | US5986028 |
| OPPOSITION | WO2008036708 |
| OPPOSITION | WO2010140343 |
| SEARCH | EP2637217 |
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.
Date
Description
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Oct 21, 2025
Oct 21, 2025
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Oct 10, 2025
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(Electronic) Receipt
Appeal
Oct 9, 2025
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Appeal
Feb 10, 2025
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Aug 31, 2023
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
May 2, 2023
May 2, 2023
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Apr 5, 2022
Mar 31, 2022
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Appeal
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Reply to appeal
Appeal
Feb 14, 2022
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Feb 7, 2022
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Dec 6, 2021
Nov 30, 2021
(Electronic) Receipt
Appeal
Nov 30, 2021
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Oct 13, 2021
Oct 8, 2021
(Electronic) Receipt
Appeal
Oct 8, 2021
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(Electronic) Receipt
Appeal
Sep 30, 2021
Sep 30, 2021
Notice of appeal
Appeal
Jul 26, 2021
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Means of redress
OPPO
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May 14, 2018
Apr 6, 2018
Decision to grant a European patent
Search/Exam
Mar 28, 2018
Mar 28, 2018
Mar 28, 2018
Intention to grant (signatures)
Search/Exam
Mar 28, 2018
Mar 28, 2018
Text intended for grant (clean copy)
Search/Exam
Mar 28, 2018
Mar 26, 2018
Mar 19, 2018
(Electronic) Receipt
Search/Exam
Mar 19, 2018
Amended description with annotations
Search/Exam
Mar 19, 2018
Mar 19, 2018
Description
Search/Exam
Mar 19, 2018
French translation of claims
Search/Exam
Mar 19, 2018
German translation of the claims
Search/Exam
Mar 19, 2018
Letter accompanying subsequently filed items
Search/Exam
Mar 19, 2018
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Jan 4, 2018
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Intention to grant (signatures)
Search/Exam
Jan 4, 2018
Text intended for grant (clean copy)
Search/Exam
Jan 4, 2018
Nov 14, 2017
Examination started
Search/Exam
Aug 17, 2017
Dec 4, 2015
Dec 4, 2015
Amended claims with annotations
Search/Exam
Dec 4, 2015
Dec 4, 2015
Amended description with annotations
Search/Exam
Dec 4, 2015
Amendments received before examination
Search/Exam
Jul 31, 2015
Jul 14, 2015
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European search opinion
Search/Exam
Jul 14, 2015
Supplementary European search report
Search/Exam
Jul 6, 2015
Search started
Search/Exam
Jan 8, 2015
Notification of forthcoming publication
Search/Exam
Nov 4, 2014
Oct 31, 2014
Communication to designated inventor
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Oct 31, 2014
Communication to designated inventor
Search/Exam
Oct 31, 2014
Communication to designated inventor
Search/Exam
Oct 30, 2014
Oct 22, 2014
(Electronic) Receipt
Search/Exam
Oct 22, 2014
Abstract
Search/Exam
Oct 22, 2014
Claims
Search/Exam
Oct 22, 2014
Description
Search/Exam
Oct 22, 2014
Drawings
Search/Exam
Oct 22, 2014
Request for entry into the European phase
Search/Exam
Oct 15, 2014
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Aug 8, 2014
Information on entry into European phase
Search/Exam
Oct 22, 2013
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Oct 3, 2013
Copy of the international search report
Search/Exam
Oct 3, 2013
Oct 3, 2013
International publication pamphlet
Search/Exam