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The patent EP3235991 was granted to VKR Holding on Aug 12, 2020. The application was filed on Apr 18, 2016 under application number EP16165754A. 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 |
|---|---|---|---|
| AUMULLER AUMATIC | May 12, 2021 | ERNICKE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1441100 |
| DESCRIPTION | EP2754820 |
| OPPOSITION | DE102011051336 |
| OPPOSITION | DE29802620U |
| OPPOSITION | EP1464786 |
| OPPOSITION | GB2026723 |
| OPPOSITION | US5449987 |
| OTHER | DE102011051336 |
| OTHER | DE29802620U |
| OTHER | EP1464786 |
| SEARCH | GB2026723 |
| SEARCH | US5449987 |
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 17, 2025
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Sep 9, 2025
(Electronic) Receipt
Appeal
Sep 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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(Electronic) Receipt
Appeal
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Appeal
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(Electronic) Receipt
Appeal
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Appeal
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(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
May 26, 2023
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(Electronic) Receipt
Appeal
May 15, 2023
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(Electronic) Receipt
Appeal
Mar 14, 2023
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Notice of appeal
Appeal
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Means of redress
OPPO
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Authorisation
OPPO
Jun 16, 2021
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Request concerning representative opponent
Search/Exam
Aug 24, 2020
Jul 16, 2020
Decision to grant a European patent
Search/Exam
Jul 3, 2020
(Electronic) Receipt
Search/Exam
Jul 3, 2020
Filing of the translations of the claims
Search/Exam
Jul 3, 2020
French translation of claims
Search/Exam
Jul 3, 2020
German translation of the claims
Search/Exam
Jul 3, 2020
Letter accompanying subsequently filed items
Search/Exam
May 28, 2020
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Intention to grant (signatures)
Search/Exam
May 28, 2020
Text intended for grant (clean copy)
Search/Exam
May 28, 2020
Feb 14, 2020
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Feb 10, 2020
(Electronic) Receipt
Search/Exam
Feb 10, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 10, 2020
Observations by third parties
Search/Exam
Feb 10, 2020
Patent document filed by a Third party
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Feb 10, 2020
Patent document filed by a Third party
Search/Exam
Feb 10, 2020
Patent document filed by a Third party
Search/Exam
Nov 27, 2019
(Electronic) Receipt
Search/Exam
Nov 27, 2019
Amended claims with annotations
Search/Exam
Nov 27, 2019
Claims
Search/Exam
Nov 27, 2019
Letter accompanying subsequently filed items
Search/Exam
Nov 27, 2019
Sep 6, 2019
Annex to the communication
Search/Exam
Sep 6, 2019
Communication from the Examining Division
Search/Exam
Sep 2, 2019
Examination started
Search/Exam
Mar 14, 2018
(Electronic) Receipt
Search/Exam
Mar 14, 2018
Mar 14, 2018
Amended claims with annotations
Search/Exam
Mar 14, 2018
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Amended description with annotations
Search/Exam
Mar 14, 2018
Amendments received before examination
Search/Exam
Mar 14, 2018
Letter accompanying subsequently filed items
Search/Exam
Mar 14, 2018
Oct 30, 2017
Sep 27, 2017
Notification of forthcoming publication
Search/Exam
Oct 17, 2016
Oct 17, 2016
European search opinion
Search/Exam
Oct 17, 2016
European search report
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Oct 17, 2016
Information on Search Strategy
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Oct 7, 2016
Search started
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Jun 10, 2016
Communication to designated inventor
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Jun 10, 2016
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Apr 25, 2016
(Electronic) Receipt
Search/Exam
Apr 25, 2016
Designation of inventor
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Apr 25, 2016
Letter accompanying subsequently filed items
Search/Exam
Apr 18, 2016
Abstract
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Apr 18, 2016
Apr 18, 2016
Claims
Search/Exam
Apr 18, 2016
Description
Search/Exam
Apr 18, 2016
Designation of inventor
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Apr 18, 2016
Drawings
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Apr 18, 2016
Request for grant of a European patent
Search/Exam