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The patent EP3142238 was granted to Huawei on Apr 23, 2025. The application was filed on Jun 16, 2015 under application number EP15810078A. 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 |
|---|---|---|---|
| SMA SOLAR TECHNOLOGY | Oct 23, 2019 | SPECHT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | CN101931215 |
| INTERNATIONAL-SEARCH-REPORT | CN102171906 |
| INTERNATIONAL-SEARCH-REPORT | CN103780071 |
| INTERNATIONAL-SEARCH-REPORT | US2010327659 |
| OPPOSITION | CN101931215 |
| OPPOSITION | CN103312140 |
| OPPOSITION | CN103780071 |
| OPPOSITION | DE102008050543 |
| OPPOSITION | DE2349161 |
| OPPOSITION | EP1914857 |
| OPPOSITION | EP2259419 |
| OPPOSITION | EP2363947 |
| OPPOSITION | US2010327659 |
| SEARCH | CN103312140 |
| SEARCH | EP2259419 |
| SEARCH | US2011194216 |
| SEARCH | US4005350 |
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
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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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Letter accompanying subsequently filed items
Search/Exam
Jul 12, 2024
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(Electronic) Receipt
Appeal
Feb 9, 2024
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Jul 25, 2022
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Jun 23, 2022
(Electronic) Receipt
Appeal
Jun 23, 2022
Jun 23, 2022
Reply to appeal
Appeal
Jun 23, 2022
Feb 14, 2022
Feb 8, 2022
(Electronic) Receipt
Appeal
Feb 8, 2022
Feb 8, 2022
Claims
Appeal
Feb 8, 2022
Claims
Appeal
Feb 8, 2022
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Dec 23, 2021
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Dec 15, 2021
(Electronic) Receipt
Appeal
Dec 15, 2021
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Dec 8, 2021
(Electronic) Receipt
Appeal
Dec 8, 2021
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Nov 29, 2021
(Electronic) Receipt
Appeal
Nov 29, 2021
Nov 29, 2021
Notice of appeal
Appeal
Oct 4, 2021
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Means of redress
OPPO
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Feb 4, 2019
Jan 7, 2019
Decision to grant a European patent
Search/Exam
Dec 7, 2018
(Electronic) Receipt
Search/Exam
Dec 7, 2018
French translation of claims
Search/Exam
Dec 7, 2018
German translation of the claims
Search/Exam
Dec 7, 2018
Letter accompanying subsequently filed items
Search/Exam
Aug 3, 2018
Aug 3, 2018
Aug 3, 2018
Intention to grant (signatures)
Search/Exam
Aug 3, 2018
Text intended for grant (clean copy)
Search/Exam
Aug 3, 2018
Jul 17, 2018
Examination started
Search/Exam
Feb 13, 2018
Feb 7, 2018
Observations by third parties
Search/Exam
Dec 27, 2017
(Electronic) Receipt
Search/Exam
Dec 27, 2017
Priority search results
Search/Exam
Dec 27, 2017
Dec 15, 2017
Dec 1, 2017
(Electronic) Receipt
Search/Exam
Dec 1, 2017
Maintenance of the application
Search/Exam
Jun 16, 2017
May 29, 2017
May 29, 2017
European search opinion
Search/Exam
May 29, 2017
Information on Search Strategy
Search/Exam
May 29, 2017
Supplementary European search report
Search/Exam
May 11, 2017
Search started
Search/Exam
Feb 15, 2017
Notification of forthcoming publication
Search/Exam
Jan 25, 2017
CDS Clean up - amended applicant details
Search/Exam
Jan 25, 2017
Communication to designated inventor
Search/Exam
Jan 25, 2017
Communication to designated inventor
Search/Exam
Jan 3, 2017
Jan 3, 2017
Dec 8, 2016
(Electronic) Receipt
Search/Exam
Dec 8, 2016
Abstract
Search/Exam
Dec 8, 2016
Abstract
Search/Exam
Dec 8, 2016
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Amended claims with annotations
Search/Exam
Dec 8, 2016
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Amended description with annotations
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Dec 8, 2016
Claims
Search/Exam
Dec 8, 2016
Description
Search/Exam
Dec 8, 2016
Drawings
Search/Exam
Dec 8, 2016
Drawings
Search/Exam
Dec 8, 2016
Request for entry into the European phase
Search/Exam
Oct 28, 2016
Information on entry into European phase
Search/Exam
Jan 13, 2016
Dec 23, 2015
Copy of the international search report
Search/Exam
Dec 23, 2015
Dec 23, 2015
International publication pamphlet
Search/Exam