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The patent EP3279621 was granted to Sonion Nederland on Apr 9, 2025. The application was filed on Apr 6, 2017 under application number EP17165245A. 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 |
|---|---|---|---|
| GOERTEK | Aug 19, 2021 | GRUNECKER PATENT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | CN2727712Y |
| DESCRIPTION | US2011179876 |
| EXAMINATION | JP2013175847 |
| OPPOSITION | CN105891878 |
| OPPOSITION | EP2536169 |
| OPPOSITION | JP2013175847 |
| OPPOSITION | US2009175477 |
| OPPOSITION | US2010183174 |
| OPPOSITION | US2010275675 |
| OPPOSITION | US2014264650 |
| OPPOSITION | US4516428 |
| OPPOSITION | US7449356 |
| OPPOSITION | US7825484 |
| OPPOSITION | US7885423 |
| OPPOSITION | US7961897 |
| SEARCH | EP2320678 |
| SEARCH | EP2536169 |
| SEARCH | GB2451909 |
| SEARCH | US2003076970 |
| SEARCH | US2010275675 |
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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Refund of fees
Search/Exam
Nov 18, 2024
Refund of fees
Search/Exam
Nov 12, 2024
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(Electronic) Receipt
Appeal
Nov 6, 2024
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Withdrawal of an appeal
Appeal
Nov 5, 2024
(Electronic) Receipt
Appeal
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Withdrawal of an appeal
Appeal
Aug 8, 2024
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(Electronic) Receipt
Appeal
Feb 27, 2024
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Reply to appeal
Appeal
Feb 26, 2024
(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
Oct 17, 2023
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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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Notice of appeal
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Means of redress
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Payment submission rejected
Search/Exam
Apr 9, 2021
Decision to grant a European patent
Search/Exam
Mar 15, 2021
Feb 26, 2021
(Electronic) Receipt
Search/Exam
Feb 26, 2021
Filing of the translations of the claims
Search/Exam
Feb 26, 2021
French translation of claims
Search/Exam
Feb 26, 2021
German translation of the claims
Search/Exam
Feb 26, 2021
Letter accompanying subsequently filed items
Search/Exam
Feb 26, 2021
Letter concerning the priority
Search/Exam
Feb 24, 2021
Feb 24, 2021
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Intention to grant (signatures)
Search/Exam
Feb 24, 2021
Text intended for grant (clean copy)
Search/Exam
Feb 24, 2021
Nov 30, 2020
(Electronic) Receipt
Search/Exam
Nov 30, 2020
Amended claims with annotations
Search/Exam
Nov 30, 2020
Amended description with annotations
Search/Exam
Nov 30, 2020
Claims
Search/Exam
Nov 30, 2020
Description
Search/Exam
Nov 30, 2020
Letter accompanying subsequently filed items
Search/Exam
Nov 30, 2020
Nov 17, 2020
Annex to the communication
Search/Exam
Nov 17, 2020
Communication from the Examining Division
Search/Exam
Nov 6, 2020
(Electronic) Receipt
Search/Exam
Nov 6, 2020
Amended claims with annotations
Search/Exam
Nov 6, 2020
Amended description with annotations
Search/Exam
Nov 6, 2020
Claims
Search/Exam
Nov 6, 2020
Description
Search/Exam
Nov 6, 2020
Letter accompanying subsequently filed items
Search/Exam
Nov 6, 2020
Matter concerning the application
Search/Exam
May 25, 2020
(Electronic) Receipt
Search/Exam
May 25, 2020
Amended claims with annotations
Search/Exam
May 25, 2020
Claims
Search/Exam
May 25, 2020
Letter accompanying subsequently filed items
Search/Exam
May 25, 2020
Feb 6, 2020
Annex to a communication
Search/Exam
Feb 6, 2020
Annex to the communication
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Feb 6, 2020
Communication from the Examining Division
Search/Exam
Jan 24, 2020
Examination started
Search/Exam
Jun 25, 2018
(Electronic) Receipt
Search/Exam
Jun 25, 2018
Letter accompanying subsequently filed items
Search/Exam
Jun 25, 2018
Reply to Written Opinion prepared by the EPO
Search/Exam
Feb 12, 2018
Jan 10, 2018
Notification of forthcoming publication
Search/Exam
Dec 15, 2017
Dec 15, 2017
European search opinion
Search/Exam
Dec 15, 2017
European search report
Search/Exam
Dec 15, 2017
Information on Search Strategy
Search/Exam
Dec 12, 2017
Priority search results copy provided by EPO
Search/Exam
Nov 27, 2017
Search started
Search/Exam
Jul 26, 2017
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Jul 10, 2017
(Electronic) Receipt
Search/Exam
Jul 10, 2017
Letter accompanying subsequently filed items
Search/Exam
Jul 10, 2017
Letter concerning the priority
Search/Exam
Jun 2, 2017
Communication to designated inventor
Search/Exam
Jun 2, 2017
Communication to designated inventor
Search/Exam
Apr 6, 2017
Abstract
Search/Exam
Apr 6, 2017
Apr 6, 2017
Claims
Search/Exam
Apr 6, 2017
Description
Search/Exam
Apr 6, 2017
Designation of inventor
Search/Exam
Apr 6, 2017
Drawings
Search/Exam
Apr 6, 2017
Request for grant of a European patent
Search/Exam