The weekly litigation news digest is live. Subscribe now
The patent EP3788178 was granted to Constellium Issoire on Aug 17, 2022. The application was filed on Apr 24, 2019 under application number EP19726060A. 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 | May 8, 2023 | 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 | US2009142222 |
| DESCRIPTION | US2012225271 |
| DESCRIPTION | US5032359 |
| DESCRIPTION | US5455003 |
| DESCRIPTION | US7229509 |
| DESCRIPTION | US7438772 |
| DESCRIPTION | WO2009036953 |
| DESCRIPTION | WO2012085359 |
| DESCRIPTION | WO2013169901 |
| INTERNATIONAL-SEARCH-REPORT | FR3007423 |
| INTERNATIONAL-SEARCH-REPORT | US2013269840 |
| OPPOSITION | CN103509984 |
| OPPOSITION | US2012152415 |
| OPPOSITION | WO2013169901 |
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
Get instant alerts for new documents
Oct 15, 2025
Refund of fees
Appeal
Oct 13, 2025
Oct 13, 2025
Oct 8, 2025
Oct 7, 2025
(Electronic) Receipt
Appeal
Oct 7, 2025
Oct 7, 2025
Withdrawal of an appeal
Appeal
Sep 30, 2025
Sep 30, 2025
Sep 24, 2025
(Electronic) Receipt
Appeal
Sep 24, 2025
Notice of appeal
Appeal
Sep 24, 2025
Notice of appeal
Appeal
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Means of redress
OPPO
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 25, 2025
Jul 10, 2025
Jul 8, 2025
Jul 7, 2025
Jul 7, 2025
Jul 7, 2025
Jul 7, 2025
Jul 7, 2025
Jul 2, 2025
Jul 2, 2025
Jul 2, 2025
May 20, 2025
May 15, 2025
May 14, 2025
May 14, 2025
May 14, 2025
May 9, 2025
May 9, 2025
May 9, 2025
May 6, 2025
May 6, 2025
May 6, 2025
May 2, 2025
Apr 30, 2025
Apr 30, 2025
Apr 30, 2025
Nov 14, 2024
Nov 14, 2024
Nov 14, 2024
Nov 14, 2024
Nov 14, 2024
Oct 2, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Sep 27, 2023
Jun 2, 2023
Jun 2, 2023
May 16, 2023
May 8, 2023
May 8, 2023
May 8, 2023
May 8, 2023
May 8, 2023
May 8, 2023
May 8, 2023
May 8, 2023
Aug 30, 2022
Jul 21, 2022
Decision to grant a European patent
Search/Exam
Jul 11, 2022
(Electronic) Receipt
Search/Exam
Jul 11, 2022
English translation of the claims
Search/Exam
Jul 11, 2022
Filing of the translations of the claims
Search/Exam
Jul 11, 2022
German translation of the claims
Search/Exam
Jul 11, 2022
Letter accompanying subsequently filed items
Search/Exam
Jun 29, 2022
Jun 29, 2022
Jun 29, 2022
Intention to grant (signatures)
Search/Exam
Jun 29, 2022
Text intended for grant (clean copy)
Search/Exam
Jun 29, 2022
May 17, 2022
(Electronic) Receipt
Search/Exam
May 17, 2022
Amended claims with annotations
Search/Exam
May 17, 2022
Claims
Search/Exam
May 17, 2022
Letter accompanying subsequently filed items
Search/Exam
May 17, 2022
May 17, 2022
Translation of the claims
Search/Exam
May 17, 2022
Translation of the claims
Search/Exam
Jan 19, 2022
Jan 19, 2022
Jan 19, 2022
Intention to grant (signatures)
Search/Exam
Jan 19, 2022
Text intended for grant (clean copy)
Search/Exam
Jan 19, 2022
Jan 4, 2022
Examination started
Search/Exam
Mar 3, 2021
Communication to designated inventor
Search/Exam
Feb 24, 2021
(Electronic) Receipt
Search/Exam
Feb 24, 2021
Feb 24, 2021
Letter accompanying subsequently filed items
Search/Exam
Feb 24, 2021
Letter concerning the inventor
Search/Exam
Feb 18, 2021
Letter which had not been notified
Search/Exam
Feb 10, 2021
Dec 9, 2020
Dec 7, 2020
Communication to designated inventor
Search/Exam
Dec 7, 2020
Communication to designated inventor
Search/Exam
Dec 7, 2020
Communication to designated inventor
Search/Exam
Dec 7, 2020
Communication to designated inventor
Search/Exam
Dec 7, 2020
Communication to designated inventor
Search/Exam
Dec 7, 2020
Communication to designated inventor
Search/Exam
Dec 2, 2020
Priority search results copy provided by EPO
Search/Exam
Nov 27, 2020
(Electronic) Receipt
Search/Exam
Nov 27, 2020
Request for entry into the European phase
Search/Exam
Nov 16, 2020
Sep 11, 2020
Information on entry into European phase
Search/Exam
Nov 26, 2019
Nov 7, 2019
Copy of the international search report
Search/Exam
Nov 7, 2019
Copy of the international search report
Search/Exam
Nov 7, 2019
Published international application - A1
Search/Exam
Jul 15, 2019
ISR: cited documents
PCTISA
Jul 15, 2019
Jul 15, 2019
Jul 15, 2019
Jul 15, 2019
Jun 6, 2019
May 25, 2019
Abstract
PCTISA
May 25, 2019
Annex
PCTISA
May 25, 2019
Claims
PCTISA
May 25, 2019
Description
PCTISA
May 25, 2019
Drawings
PCTISA
May 25, 2019
May 25, 2019