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The patent EP3098267 was granted to Kaneka on May 25, 2022. The application was filed on Jan 20, 2015 under application number EP15740491A. 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 |
|---|---|---|---|
| WACKER CHEMIE | May 28, 2019 | MIESKES | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0831108 |
| DESCRIPTION | JP2000169544 |
| DESCRIPTION | JP2000169545 |
| DESCRIPTION | JP2001072854 |
| DESCRIPTION | JP2001181532 |
| DESCRIPTION | JP2001207157 |
| DESCRIPTION | JP2003155389 |
| DESCRIPTION | JPH0314068B |
| DESCRIPTION | JPH03160053 |
| DESCRIPTION | JPH04283259 |
| DESCRIPTION | JPH0455444B |
| DESCRIPTION | JPH0469659B |
| DESCRIPTION | JPH05117521 |
| DESCRIPTION | JPH0570531 |
| DESCRIPTION | JPH06172631 |
| DESCRIPTION | JPH06211879 |
| DESCRIPTION | JPH06211922 |
| DESCRIPTION | JPH0627250B |
| DESCRIPTION | JPH06279693 |
| DESCRIPTION | JPH07108928B |
| DESCRIPTION | JPH07258534 |
| DESCRIPTION | JPH09194731 |
| DESCRIPTION | JPH09272714 |
| DESCRIPTION | JPH10204144 |
| DESCRIPTION | JPH10273512 |
| DESCRIPTION | JPH1053637 |
| DESCRIPTION | JPH11116763 |
| DESCRIPTION | JPH11241029 |
| DESCRIPTION | JPH11349916 |
| DESCRIPTION | JPH1160722 |
| DESCRIPTION | JPS59122541 |
| DESCRIPTION | JPS5915336B |
| DESCRIPTION | JPS59168014 |
| DESCRIPTION | JPS5978223 |
| DESCRIPTION | JPS60228516 |
| DESCRIPTION | JPS60228517 |
| DESCRIPTION | JPS61215623 |
| DESCRIPTION | JPS63112642 |
| DESCRIPTION | JPS63254149 |
| DESCRIPTION | JPS6422904 |
| DESCRIPTION | US3278457 |
| DESCRIPTION | US3278458 |
| DESCRIPTION | US3278459 |
| DESCRIPTION | US3427256 |
| DESCRIPTION | US3427334 |
| DESCRIPTION | US3427335 |
| DESCRIPTION | US5364955 |
| DESCRIPTION | US5756751 |
| DESCRIPTION | WO2012121288 |
| INTERNATIONAL-SEARCH-REPORT | EP0120833 |
| INTERNATIONAL-SEARCH-REPORT | JP2000109732 |
| INTERNATIONAL-SEARCH-REPORT | JP2002020548 |
| INTERNATIONAL-SEARCH-REPORT | JP2003105307 |
| INTERNATIONAL-SEARCH-REPORT | JP2005206654 |
| INTERNATIONAL-SEARCH-REPORT | JP2006264126 |
| INTERNATIONAL-SEARCH-REPORT | JPH0627666 |
| INTERNATIONAL-SEARCH-REPORT | US5705541 |
| INTERNATIONAL-SEARCH-REPORT | WO2011096206 |
| OPPOSITION | WO2005059005 |
| OPPOSITION | WO2005108520 |
| SEARCH | EP2684690 |
| SEARCH | US5705541 |
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
Search/Exam
Jul 12, 2018
(Electronic) Receipt
Search/Exam
Jul 12, 2018
Filing of the translations of the claims
Search/Exam
Jul 12, 2018
French translation of claims
Search/Exam
Jul 12, 2018
German translation of the claims
Search/Exam
Jul 12, 2018
Letter accompanying subsequently filed items
Search/Exam
Mar 2, 2018
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Intention to grant (signatures)
Search/Exam
Mar 2, 2018
Text intended for grant (clean copy)
Search/Exam
Mar 2, 2018
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Examination started
Search/Exam
Jan 23, 2018
Maintenance of the application
Search/Exam
Nov 2, 2017
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European search opinion
Search/Exam
Oct 13, 2017
Information on Search Strategy
Search/Exam
Oct 13, 2017
Supplementary European search report
Search/Exam
Nov 3, 2016
Notification of forthcoming publication
Search/Exam
Oct 6, 2016
Sep 14, 2016
Communication to designated inventor
Search/Exam
Sep 14, 2016
Communication to designated inventor
Search/Exam
Aug 23, 2016
(Electronic) Receipt
Search/Exam
Aug 23, 2016
Abstract
Search/Exam
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Amended claims with annotations
Search/Exam
Aug 23, 2016
Claims
Search/Exam
Aug 23, 2016
Description
Search/Exam
Aug 23, 2016
Request for entry into the European phase
Search/Exam
Jun 3, 2016
Information on entry into European phase
Search/Exam
Aug 17, 2015
Jul 30, 2015
Copy of the international search report
Search/Exam
Jul 30, 2015
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International publication pamphlet
Search/Exam