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The patent EP3508545 was granted to Mitsubishi Hitec Paper Europe on May 5, 2021. The application was filed on Dec 18, 2018 under application number EP18213617A. 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.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| KOEHLER INNOVATION & TECHNOLOGY | Feb 4, 2022 | MEISSNER BOLTE PARTNERSCHAFT MBB | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE102014107567 |
| OPPOSITION | DE102018133168 |
| OPPOSITION | DE1077387 |
| OPPOSITION | DE112007002203T |
| OPPOSITION | DE112009003792 |
| OPPOSITION | DE4425737 |
| OPPOSITION | DE602004005746T |
| OPPOSITION | EP1098947 |
| OPPOSITION | EP1231073 |
| OPPOSITION | EP2993055 |
| OPPOSITION | EP3219506 |
| OPPOSITION | US2006063013 |
| OPPOSITION | US2008015107 |
| OPPOSITION | WO2004083310 |
| OPPOSITION | WO2007050964 |
| OPPOSITION | WO2009129908 |
| OPPOSITION | WO2017170462 |
| OPPOSITION | WO2018145874 |
| OPPOSITION | WO2019149805 |
| SEARCH | DE102007028497 |
| SEARCH | US2015037576 |
| SEARCH | US2219071 |
| SEARCH | US4021060 |
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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Sep 5, 2025
Sep 4, 2025
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(Electronic) Receipt
Appeal
Oct 7, 2024
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Refund of fees
Search/Exam
Mar 7, 2024
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(Electronic) Receipt
Appeal
Mar 6, 2024
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Feb 5, 2024
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Withdrawal of an appeal
Appeal
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(Electronic) Receipt
Appeal
Dec 14, 2023
(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
Dec 14, 2023
Notice of appeal
Appeal
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Means of redress
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May 19, 2021
Apr 9, 2021
Decision to grant a European patent
Search/Exam
Mar 23, 2021
(Electronic) Receipt
Search/Exam
Mar 23, 2021
English translation of the claims
Search/Exam
Mar 23, 2021
Filing of the translations of the claims
Search/Exam
Mar 23, 2021
French translation of claims
Search/Exam
Mar 23, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 16, 2020
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Intention to grant (signatures)
Search/Exam
Dec 16, 2020
Text intended for grant (clean copy)
Search/Exam
Dec 16, 2020
Nov 19, 2020
Examination started
Search/Exam
Jul 1, 2020
Jun 16, 2020
(Electronic) Receipt
Search/Exam
Jun 16, 2020
Enquiry as to the processing of the file
Search/Exam
Jun 16, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 28, 2019
(Electronic) Receipt
Search/Exam
Oct 28, 2019
Oct 28, 2019
Amended claims with annotations
Search/Exam
Oct 28, 2019
Amendments received before examination
Search/Exam
Oct 28, 2019
Letter accompanying subsequently filed items
Search/Exam
Jul 15, 2019
Jun 13, 2019
Notification of forthcoming publication
Search/Exam
Jun 6, 2019
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European search opinion
Search/Exam
Jun 6, 2019
European search report
Search/Exam
Jun 6, 2019
Information on Search Strategy
Search/Exam
May 16, 2019
Search started
Search/Exam
Mar 13, 2019
Communication to designated inventor
Search/Exam
Mar 13, 2019
Communication to designated inventor
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Mar 13, 2019
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Mar 13, 2019
Communication to designated inventor
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Jan 24, 2019
Jan 11, 2019
Letter concerning the priority
Search/Exam
Jan 11, 2019
Priority document
Search/Exam
Dec 18, 2018
Abstract
Search/Exam
Dec 18, 2018
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Claims
Search/Exam
Dec 18, 2018
Description
Search/Exam
Dec 18, 2018
Designation of inventor
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Dec 18, 2018
Drawings
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Dec 18, 2018
Priority search results
Search/Exam
Dec 18, 2018
Request for grant of a European patent
Search/Exam