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The patent EP3289627 was granted to Duesenfeld on May 20, 2020. The application was filed on Apr 28, 2016 under application number EP16719400A. 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 |
|---|---|---|---|
| EKATO SYSTEMS | Feb 16, 2023 | DAUB | INTERVENTION ADMISSIBLE |
| VOLKSWAGEN | Feb 15, 2021 | - | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | DE102011110083 |
| INTERNATIONAL-SEARCH-REPORT | WO2010102377 |
| OPPOSITION | CN103259062 |
| OPPOSITION | DE102011110083 |
| OPPOSITION | DE102012024876 |
| OPPOSITION | DE4424825 |
| OPPOSITION | KR100665626B |
| OPPOSITION | US2016049699 |
| OPPOSITION | WO2010102377 |
| OPPOSITION | WO2010149611 |
| OTHER | DE102011110083 |
| OTHER | DE102012024876 |
| OTHER | JP2013004299 |
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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Dec 18, 2025
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Dec 12, 2025
(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
Dec 9, 2025
(Electronic) Receipt
Appeal
Dec 9, 2025
Notice of appeal
Appeal
Dec 9, 2025
Notice of appeal
Appeal
Nov 5, 2025
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(Electronic) Receipt
Appeal
Oct 30, 2025
Notice of appeal
Appeal
Oct 30, 2025
Notice of appeal
Appeal
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OPPO
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Refund of fees
Appeal
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Refund of fees
Appeal
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Appeal
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Advice of delivery
Search/Exam
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Description
Appeal
Jun 26, 2023
Description
Appeal
Jun 26, 2023
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Reply to appeal
Appeal
Jun 26, 2023
Reply to appeal
Appeal
Jun 26, 2023
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Refund of fees
Appeal
Mar 23, 2023
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Mar 17, 2023
(Electronic) Receipt
Appeal
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Description
Appeal
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Authorisation
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OPPO
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Decision to grant a European patent
Search/Exam
Apr 9, 2020
(Electronic) Receipt
Search/Exam
Apr 9, 2020
English translation of the claims
Search/Exam
Apr 9, 2020
Filing of the translations of the claims
Search/Exam
Apr 9, 2020
French translation of claims
Search/Exam
Apr 9, 2020
Letter accompanying subsequently filed items
Search/Exam
Dec 6, 2019
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Text intended for grant (clean copy)
Search/Exam
Dec 6, 2019
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Intention to grant (signatures)
Search/Exam
Dec 2, 2019
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Examination started
Search/Exam
Aug 16, 2019
Dec 3, 2018
Nov 20, 2018
(Electronic) Receipt
Search/Exam
Nov 20, 2018
Letter accompanying subsequently filed items
Search/Exam
Nov 20, 2018
Feb 7, 2018
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(Electronic) Receipt
Search/Exam
Jan 29, 2018
Letter accompanying subsequently filed items
Search/Exam
Jan 22, 2018
Jan 16, 2018
Letter which had not been notified
Search/Exam
Dec 6, 2017
Dec 4, 2017
Communication to designated inventor
Search/Exam
Dec 4, 2017
Communication to designated inventor
Search/Exam
Dec 4, 2017
Communication to designated inventor
Search/Exam
Dec 4, 2017
Communication to designated inventor
Search/Exam
Nov 13, 2017
Oct 18, 2017
(Electronic) Receipt
Search/Exam
Oct 18, 2017
Oct 18, 2017
Amended claims with annotations
Search/Exam
Oct 18, 2017
Oct 18, 2017
Amended description with annotations
Search/Exam
Oct 18, 2017
Amendments received before examination
Search/Exam
Oct 18, 2017
Priority search results
Search/Exam
Oct 18, 2017
Request for entry into the European phase
Search/Exam
Oct 17, 2017
Oct 17, 2017
Oct 17, 2017
Notification of the recording of a change
Search/Exam
Sep 8, 2017
Information on entry into European phase
Search/Exam
Nov 21, 2016
Nov 3, 2016
Copy of the international search report
Search/Exam
Nov 3, 2016
Copy of the international search report
Search/Exam
Nov 3, 2016
Published international application - A1
Search/Exam
Aug 15, 2016
Jul 13, 2016
ISR: cited documents
PCTISA
Jul 13, 2016
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Apr 28, 2016
(Electronic) Receipt
PCTRO
Apr 28, 2016
Abstract
PCTRO
Apr 28, 2016
Claims
PCTRO
Apr 28, 2016
Description
PCTRO
Apr 28, 2016
Apr 28, 2016
Drawings
PCTRO
Apr 28, 2016