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The patent EP3556228 was granted to GD on Oct 22, 2025. The application was originally filed on Apr 10, 2019 under application number EP19168335A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE102005028334 |
| OPPOSITION | DE102005063337 |
| OPPOSITION | EP0254006 |
| OPPOSITION | EP0471133 |
| OPPOSITION | US4646986 |
| OPPOSITION | WO2007033848 |
| SEARCH | DE3344929 |
| SEARCH | EP0254006 |
| SEARCH | US4646986 |
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 25, 2025
Sep 25, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
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Jun 18, 2025
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Jun 13, 2025
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Jun 12, 2025
Refund of fees
Appeal
Jun 10, 2025
Jun 10, 2025
Jun 4, 2025
(Electronic) Receipt
Appeal
Jun 4, 2025
Jun 4, 2025
Jun 4, 2025
Withdrawal of an appeal
Appeal
May 12, 2025
May 12, 2025
May 6, 2025
(Electronic) Receipt
Appeal
May 6, 2025
Notice of appeal
Appeal
Mar 6, 2025
Mar 6, 2025
Mar 6, 2025
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Means of redress
OPPO
Mar 6, 2025
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Information concerning oral proceedings
Search/Exam
Apr 5, 2024
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Nov 3, 2023
Oct 30, 2023
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Sep 20, 2022
Aug 11, 2022
Decision to grant a European patent
Search/Exam
Jul 28, 2022
(Electronic) Receipt
Search/Exam
Jul 28, 2022
Filing of the translations of the claims
Search/Exam
Jul 28, 2022
French translation of claims
Search/Exam
Jul 28, 2022
German translation of the claims
Search/Exam
Jun 9, 2022
Jun 9, 2022
Jun 9, 2022
Intention to grant (signatures)
Search/Exam
Jun 9, 2022
Text intended for grant (clean copy)
Search/Exam
Jun 9, 2022
May 20, 2022
Examination started
Search/Exam
Apr 21, 2020
(Electronic) Receipt
Search/Exam
Apr 21, 2020
Apr 21, 2020
Amended claims with annotations
Search/Exam
Apr 21, 2020
Apr 21, 2020
Amended description with annotations
Search/Exam
Apr 21, 2020
Amendments received before examination
Search/Exam
Apr 21, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 28, 2019
Sep 25, 2019
Notification of forthcoming publication
Search/Exam
Sep 10, 2019
Refund of fees
Search/Exam
Sep 5, 2019
Sep 5, 2019
European search opinion
Search/Exam
Sep 5, 2019
European search report
Search/Exam
Sep 5, 2019
Information on Search Strategy
Search/Exam
Aug 28, 2019
Search started
Search/Exam
Jun 11, 2019
Authorisation
Search/Exam
Jun 11, 2019
Designation of inventor
Search/Exam
Jun 11, 2019
Letter concerning the priority
Search/Exam
Jun 11, 2019
Priority document
Search/Exam
Jun 4, 2019
Communication to designated inventor
Search/Exam
Jun 4, 2019
Communication to designated inventor
Search/Exam
Jun 4, 2019
Communication to designated inventor
Search/Exam
Jun 4, 2019
Communication to designated inventor
Search/Exam
Jun 4, 2019
Communication to designated inventor
Search/Exam
Apr 10, 2019
Abstract
Search/Exam
Apr 10, 2019
Apr 10, 2019
Claims
Search/Exam
Apr 10, 2019
Description
Search/Exam
Apr 10, 2019
Designation of inventor
Search/Exam
Apr 10, 2019
Drawings
Search/Exam
Apr 10, 2019
Request for grant of a European patent
Search/Exam
Apr 10, 2019