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The patent EP3424618 was granted to Refractory on Mar 10, 2021. The application was originally filed on Jul 5, 2017 under application number EP17179692A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| VESUVIUS GROUP | Dec 10, 2021 | BROHEZ | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0875320 |
| OPPOSITION | US2011278331 |
| OPPOSITION | US2012037831 |
| OPPOSITION | US6045015 |
| SEARCH | EP0875320 |
| SEARCH | US2012037831 |
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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Jul 16, 2025
Refund of fees
Appeal
Jul 10, 2025
Jul 10, 2025
Jul 8, 2025
Jul 8, 2025
Jul 3, 2025
Jul 3, 2025
Jul 2, 2025
(Electronic) Receipt
Appeal
Jul 2, 2025
Jul 2, 2025
Withdrawal of an appeal
Appeal
Jun 27, 2025
(Electronic) Receipt
Appeal
Jun 27, 2025
Jun 27, 2025
Jun 23, 2025
Jun 23, 2025
Jun 6, 2025
Jun 6, 2025
Jan 24, 2025
Jan 24, 2025
Jan 21, 2025
Jul 16, 2024
Feb 26, 2024
Feb 20, 2024
(Electronic) Receipt
Appeal
Feb 20, 2024
Feb 20, 2024
Reply to appeal
Appeal
Oct 25, 2023
Oct 19, 2023
(Electronic) Receipt
Appeal
Oct 19, 2023
Oct 19, 2023
Oct 19, 2023
Oct 19, 2023
Oct 19, 2023
Aug 23, 2023
Aug 23, 2023
Aug 17, 2023
(Electronic) Receipt
Appeal
Aug 17, 2023
Aug 17, 2023
Notice of appeal
Appeal
Jun 28, 2023
Jun 20, 2023
Jun 20, 2023
Jun 20, 2023
Jun 19, 2023
Jun 19, 2023
Jun 19, 2023
Jun 19, 2023
Jun 19, 2023
Jun 19, 2023
Means of redress
OPPO
Jun 19, 2023
Jun 19, 2023
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Jun 19, 2023
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Jun 19, 2023
May 12, 2023
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May 10, 2023
May 10, 2023
Authorisation
OPPO
May 10, 2023
Apr 27, 2023
Mar 16, 2023
Mar 15, 2023
Mar 15, 2023
Mar 13, 2023
Mar 9, 2023
Mar 9, 2023
Mar 9, 2023
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Dec 6, 2022
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Oct 5, 2022
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May 16, 2022
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Dec 17, 2021
Dec 14, 2021
Dec 10, 2021
Dec 10, 2021
Dec 10, 2021
Dec 10, 2021
Dec 10, 2021
Dec 10, 2021
Mar 22, 2021
Feb 11, 2021
Decision to grant a European patent
Search/Exam
Feb 2, 2021
(Electronic) Receipt
Search/Exam
Feb 2, 2021
English translation of the claims
Search/Exam
Feb 2, 2021
Filing of the translations of the claims
Search/Exam
Feb 2, 2021
French translation of claims
Search/Exam
Nov 10, 2020
Nov 10, 2020
Nov 10, 2020
Intention to grant (signatures)
Search/Exam
Nov 10, 2020
Text intended for grant (clean copy)
Search/Exam
Nov 10, 2020
Sep 24, 2020
Claims
Search/Exam
Sep 24, 2020
Sep 17, 2020
Claims
Search/Exam
Sep 17, 2020
Sep 15, 2020
Claims
Search/Exam
Sep 15, 2020
Jul 14, 2020
Jul 13, 2020
Jul 7, 2020
Mar 6, 2020
Annex to the communication
Search/Exam
Mar 6, 2020
Communication from the Examining Division
Search/Exam
Mar 2, 2020
Claims
Search/Exam
Mar 2, 2020
Feb 13, 2020
Claims
Search/Exam
Feb 13, 2020
Oct 9, 2019
Annex to the communication
Search/Exam
Oct 9, 2019
Communication from the Examining Division
Search/Exam
Oct 3, 2019
Examination started
Search/Exam
Jul 19, 2019
Jul 19, 2019
Jul 19, 2019
Amendments received before examination
Search/Exam
Jul 9, 2019
Jul 9, 2019
Jul 9, 2019
Amendments received before examination
Search/Exam
Jan 14, 2019
Dec 12, 2018
Notification of forthcoming publication
Search/Exam
Dec 19, 2017
Dec 19, 2017
European search opinion
Search/Exam
Dec 19, 2017
European search report
Search/Exam
Dec 19, 2017
Information on Search Strategy
Search/Exam
Dec 8, 2017
Search started
Search/Exam
Aug 28, 2017
Communication to designated inventor
Search/Exam
Aug 21, 2017
Designation of inventor
Search/Exam
Aug 21, 2017
Letter concerning the inventor
Search/Exam
Aug 15, 2017
Designation of inventor
Search/Exam
Aug 15, 2017
Letter concerning the inventor
Search/Exam
Aug 7, 2017
Deficiency in designation of inventor
Search/Exam
Jul 5, 2017
Abstract
Search/Exam
Jul 5, 2017
Jul 5, 2017
Claims
Search/Exam
Jul 5, 2017
Description
Search/Exam
Jul 5, 2017
Drawings
Search/Exam
Jul 5, 2017
Request for grant of a European patent
Search/Exam