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The patent EP3821051 was granted to Aleris Rolled Products Germany on May 10, 2023. The application was filed on Oct 23, 2019 under application number EP19797192A. 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 |
|---|---|---|---|
| ARCONIC | Feb 12, 2024 | LENZING GERBER STUTE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0473122 |
| DESCRIPTION | JPH07252574 |
| DESCRIPTION | US5213639 |
| DESCRIPTION | US5938867 |
| INTERNATIONAL-SEARCH-REPORT | CN103589977B |
| INTERNATIONAL-SEARCH-REPORT | CN106480384 |
| INTERNATIONAL-SEARCH-REPORT | US2008121317 |
| INTERNATIONAL-SEARCH-REPORT | US6277219 |
| INTERNATIONAL-SEARCH-REPORT | WO9859086 |
| OPPOSITION | EP0031605 |
| OPPOSITION | JP2000119782 |
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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Means of redress
OPPO
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Aug 14, 2023
May 24, 2023
Apr 14, 2023
Decision to grant a European patent
Search/Exam
Mar 30, 2023
(Electronic) Receipt
Search/Exam
Mar 30, 2023
Filing of the translations of the claims
Search/Exam
Mar 30, 2023
French translation of claims
Search/Exam
Mar 30, 2023
German translation of the claims
Search/Exam
Jan 11, 2023
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Intention to grant (signatures)
Search/Exam
Jan 11, 2023
Text intended for grant (clean copy)
Search/Exam
Jan 11, 2023
Dec 8, 2022
(Electronic) Receipt
Search/Exam
Dec 8, 2022
Amended description with annotations
Search/Exam
Dec 8, 2022
Description
Search/Exam
Dec 8, 2022
Letter accompanying subsequently filed items
Search/Exam
Dec 8, 2022
Sep 15, 2022
Sep 15, 2022
Sep 15, 2022
Intention to grant (signatures)
Search/Exam
Sep 15, 2022
Text intended for grant (clean copy)
Search/Exam
Sep 15, 2022
Jul 29, 2022
Examination started
Search/Exam
Mar 2, 2022
Feb 24, 2022
Annexes in respect of a client data request
Search/Exam
Feb 24, 2022
Annexes in respect of a client data request
Search/Exam
Feb 24, 2022
Aug 4, 2021
(Electronic) Receipt
Search/Exam
Aug 4, 2021
Aug 4, 2021
Amended claims with annotations
Search/Exam
Aug 4, 2021
Amendments received before examination
Search/Exam
Aug 4, 2021
Letter accompanying subsequently filed items
Search/Exam
May 17, 2021
Apr 21, 2021
Feb 25, 2021
Feb 18, 2021
Feb 18, 2021
Priority search results copy provided by EPO
Search/Exam
Feb 17, 2021
Communication to designated inventor
Search/Exam
Feb 17, 2021
Communication to designated inventor
Search/Exam
Feb 17, 2021
Communication to designated inventor
Search/Exam
Feb 17, 2021
Communication to designated inventor
Search/Exam
Feb 9, 2021
(Electronic) Receipt
Search/Exam
Feb 9, 2021
Feb 9, 2021
Amended claims with annotations
Search/Exam
Feb 9, 2021
Matter concerning the application
Search/Exam
Feb 9, 2021
Request for entry into the European phase
Search/Exam
Feb 9, 2021
Submission concerning representation
Search/Exam
Jul 16, 2020
Jul 16, 2020
Jul 16, 2020
Notification of the recording of a change
Search/Exam
Jul 2, 2020
(Electronic) Receipt
PCTRO
Jul 2, 2020
Jul 2, 2020
Jul 2, 2020
May 25, 2020
May 7, 2020
Copy of the international search report
Search/Exam
May 7, 2020
Published international application - A1
Search/Exam
Jan 21, 2020
ISR: cited documents
PCTISA
Jan 21, 2020
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Dec 19, 2019
(Electronic) Receipt
PCTRO
Dec 19, 2019
Dec 19, 2019
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Nov 14, 2019
Nov 13, 2019
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Nov 8, 2019
Oct 23, 2019
(Electronic) Receipt
PCTRO
Oct 23, 2019
Abstract
PCTRO
Oct 23, 2019
Claims
PCTRO
Oct 23, 2019
Description
PCTRO
Oct 23, 2019
Oct 23, 2019
Drawings
PCTRO
Oct 23, 2019
Oct 23, 2019