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The patent EP3242008 was granted to Dong Yang Piston on Apr 19, 2023. The application was filed on May 31, 2016 under application number EP16172312A. 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 |
|---|---|---|---|
| FEDERAL MOGUL NURNBERG | Mar 24, 2021 | HOFFMANN EITLE | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE102008002571 |
| OPPOSITION | DE102008031863 |
| OPPOSITION | US2006037471 |
| OPPOSITION | US2011107997 |
| OPPOSITION | US2014305401 |
| OPPOSITION | US2015247474 |
| OPPOSITION | US5595145 |
| SEARCH | DE10113639 |
| SEARCH | DE102004060546 |
| SEARCH | DE102008002571 |
| SEARCH | JP2009215978 |
| SEARCH | JPH02118151U |
| SEARCH | US5595145 |
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.
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Decision to grant a European patent
Search/Exam
May 4, 2020
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Intention to grant (signatures)
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May 4, 2020
Text intended for grant (clean copy)
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May 4, 2020
Mar 23, 2020
(Electronic) Receipt
Search/Exam
Mar 23, 2020
Amended claims with annotations
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Mar 23, 2020
Claims
Search/Exam
Mar 23, 2020
French translation of claims
Search/Exam
Mar 23, 2020
German translation of the claims
Search/Exam
Mar 23, 2020
Letter accompanying subsequently filed items
Search/Exam
Mar 23, 2020
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Intention to grant (signatures)
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Nov 12, 2019
Text intended for grant (clean copy)
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Nov 12, 2019
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Examination started
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Jun 14, 2019
May 8, 2018
(Electronic) Receipt
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May 8, 2018
(Electronic) Receipt
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May 8, 2018
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Amended claims with annotations
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Amended description with annotations
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Amendments received before examination
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May 8, 2018
Letter accompanying subsequently filed items
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May 8, 2018
Letter accompanying subsequently filed items
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Nov 13, 2017
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Notification of forthcoming publication
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Oct 4, 2017
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European search opinion
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Oct 4, 2017
European search report
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Oct 4, 2017
Information on Search Strategy
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Sep 21, 2017
Search started
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Aug 24, 2016
Communication to designated inventor
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Aug 24, 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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Communication to designated inventor
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Aug 16, 2016
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(Electronic) Receipt
Search/Exam
Jul 29, 2016
Designation of inventor
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Jul 29, 2016
Letter accompanying subsequently filed items
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Jul 20, 2016
(Electronic) Receipt
Search/Exam
Jul 20, 2016
Letter accompanying subsequently filed items
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Jul 18, 2016
Deficiency in designation of inventor
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Jul 18, 2016
Invitation to pay claims fees
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May 31, 2016
Abstract
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May 31, 2016
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Claims
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May 31, 2016
Description
Search/Exam
May 31, 2016
Drawings
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May 31, 2016
Request for grant of a European patent
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