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The patent EP3294917 was granted to Arconic on Sep 24, 2025. The application was filed on May 9, 2016 under application number EP16793338A. 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 |
|---|---|---|---|
| C TEC CONSTELLIUM TECHNOLOGY CENTERCONSTELLIUM ISSOIRE | Nov 30, 2022 | CONSTELLIUM PROPRIETE INDUSTRIELLE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | CN103233148 |
| DESCRIPTION | US6972110 |
| INTERNATIONAL-SEARCH-REPORT | JP2014198899 |
| INTERNATIONAL-SEARCH-REPORT | US2002150498 |
| INTERNATIONAL-SEARCH-REPORT | US2007029016 |
| INTERNATIONAL-SEARCH-REPORT | US2012000578 |
| INTERNATIONAL-SEARCH-REPORT | US2014209222 |
| OPPOSITION | JPH09279284 |
| OPPOSITION | US5047092 |
| OPPOSITION | WO9424326 |
| SEARCH | CN103233148B |
| SEARCH | US2007029016 |
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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Aug 28, 2025
Aug 28, 2025
Aug 19, 2025
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Refund of fees
Search/Exam
Apr 29, 2025
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Apr 23, 2025
(Electronic) Receipt
Appeal
Apr 23, 2025
Apr 23, 2025
Withdrawal of an appeal
Appeal
Apr 14, 2025
Apr 11, 2025
Apr 11, 2025
Apr 7, 2025
(Electronic) Receipt
Appeal
Apr 7, 2025
Notice of appeal
Appeal
Apr 7, 2025
Notice of appeal
Appeal
Feb 7, 2025
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Means of redress
OPPO
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Mar 15, 2022
Feb 3, 2022
Decision to grant a European patent
Search/Exam
Jan 20, 2022
(Electronic) Receipt
Search/Exam
Jan 20, 2022
Filing of the translations of the claims
Search/Exam
Jan 20, 2022
French translation of claims
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Jan 20, 2022
German translation of the claims
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Jan 20, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 4, 2021
Nov 4, 2021
Nov 4, 2021
Intention to grant (signatures)
Search/Exam
Nov 4, 2021
Text intended for grant (clean copy)
Search/Exam
Nov 4, 2021
May 27, 2021
(Electronic) Receipt
Search/Exam
May 27, 2021
Amended claims with annotations
Search/Exam
May 27, 2021
Amended description with annotations
Search/Exam
May 27, 2021
Claims
Search/Exam
May 27, 2021
Description
Search/Exam
May 27, 2021
Letter accompanying subsequently filed items
Search/Exam
May 27, 2021
Apr 9, 2021
Annex to the communication
Search/Exam
Apr 9, 2021
Communication from the Examining Division
Search/Exam
Oct 14, 2020
(Electronic) Receipt
Search/Exam
Oct 14, 2020
Amended claims with annotations
Search/Exam
Oct 14, 2020
Claims
Search/Exam
Oct 14, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 14, 2020
Oct 13, 2020
(Electronic) Receipt
Search/Exam
Oct 13, 2020
Amended claims with annotations
Search/Exam
Oct 13, 2020
Annex
Search/Exam
Oct 13, 2020
Claims
Search/Exam
Oct 13, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 13, 2020
Sep 18, 2020
Sep 14, 2020
Letter accompanying subsequently filed items
Search/Exam
Sep 14, 2020
Letter accompanying subsequently filed items
Search/Exam
Sep 14, 2020
Jun 4, 2020
Annex to the communication
Search/Exam
Jun 4, 2020
Communication from the Examining Division
Search/Exam
May 29, 2020
Examination started
Search/Exam
Mar 17, 2020
Mar 4, 2020
(Electronic) Receipt
Search/Exam
Mar 4, 2020
Annexes in respect of a client data request
Search/Exam
Mar 4, 2020
Annexes in respect of a client data request
Search/Exam
Mar 4, 2020
Annexes in respect of a client data request
Search/Exam
Mar 4, 2020
Letter accompanying subsequently filed items
Search/Exam
Mar 4, 2020
Mar 2, 2020
Feb 20, 2020
(Electronic) Receipt
Search/Exam
Feb 20, 2020
Annexes in respect of a client data request
Search/Exam
Feb 20, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 20, 2020
Mar 12, 2019
(Electronic) Receipt
Search/Exam
Mar 12, 2019
Mar 12, 2019
Amended claims with annotations
Search/Exam
Mar 12, 2019
Amendments received before examination
Search/Exam
Mar 12, 2019
Letter accompanying subsequently filed items
Search/Exam
Sep 11, 2018
Aug 23, 2018
Aug 23, 2018
European search opinion
Search/Exam
Aug 23, 2018
Information on Search Strategy
Search/Exam
Aug 23, 2018
Supplementary European search report
Search/Exam
Aug 13, 2018
Search started
Search/Exam
Feb 21, 2018
Dec 20, 2017
Dec 18, 2017
Communication to designated inventor
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Dec 18, 2017
Communication to designated inventor
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Dec 18, 2017
Communication to designated inventor
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Dec 18, 2017
Communication to designated inventor
Search/Exam
Dec 18, 2017
Communication to designated inventor
Search/Exam
Nov 27, 2017
Nov 16, 2017
Nov 13, 2017
Citation filed by a third party
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Nov 13, 2017
Citation filed by a third party
Search/Exam
Nov 13, 2017
Observations by third parties
Search/Exam
Nov 9, 2017
(Electronic) Receipt
Search/Exam
Nov 9, 2017
Nov 9, 2017
Request for entry into the European phase
Search/Exam
Oct 17, 2017
Notification of the recording of a change
Search/Exam
Oct 17, 2017
Notification of the recording of a change
Search/Exam
Sep 22, 2017
Information on entry into European phase
Search/Exam
Dec 5, 2016
Nov 17, 2016
Copy of the international search report
Search/Exam
Nov 17, 2016
Published international application - A1
Search/Exam