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The patent EP2791377 was granted to Aperam on Jul 11, 2018. The application was filed on Dec 17, 2012 under application number EP12801754A. The patent is currently recorded with a legal status of "Opposition Rejected".

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 |
|---|---|---|---|
| VACUUMSCHMELZE | Apr 10, 2019 | JENSEN & SON | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP0935008 |
| INTERNATIONAL-SEARCH-REPORT | US3597286 |
| INTERNATIONAL-SEARCH-REPORT | US3622409 |
| INTERNATIONAL-SEARCH-REPORT | US3695944 |
| INTERNATIONAL-SEARCH-REPORT | US3793092 |
| INTERNATIONAL-SEARCH-REPORT | US5501747 |
| OPPOSITION | US2004089377 |
| OPPOSITION | US3597286 |
| OPPOSITION | US3622409 |
| OPPOSITION | US3634072 |
| OPPOSITION | US3695944 |
| OPPOSITION | US3793092 |
| OPPOSITION | US6146474 |
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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Oct 2, 2023
Refund of fees
Search/Exam
Sep 28, 2023
Sep 28, 2023
Sep 25, 2023
Sep 22, 2023
Sep 22, 2023
Sep 22, 2023
Sep 22, 2023
Sep 21, 2023
(Electronic) Receipt
Appeal
Sep 21, 2023
Sep 21, 2023
Withdrawal of an appeal
Appeal
Aug 4, 2023
Aug 4, 2023
Jul 25, 2023
Jul 19, 2023
(Electronic) Receipt
Appeal
Jul 19, 2023
(Electronic) Receipt
Appeal
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 19, 2023
Jul 17, 2023
Jul 17, 2023
Jul 17, 2023
Jul 17, 2023
Jun 5, 2023
Jun 2, 2023
(Electronic) Receipt
Appeal
Jun 2, 2023
Jun 2, 2023
May 26, 2023
May 26, 2023
Oct 28, 2022
Oct 28, 2022
Oct 25, 2022
Mar 21, 2022
Mar 16, 2022
(Electronic) Receipt
Appeal
Mar 16, 2022
Mar 16, 2022
Mar 16, 2022
Mar 16, 2022
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Mar 16, 2022
Mar 16, 2022
Reply to appeal
Appeal
Mar 2, 2022
Dec 6, 2021
Nov 30, 2021
(Electronic) Receipt
Appeal
Nov 30, 2021
Nov 30, 2021
Oct 5, 2021
Oct 5, 2021
Sep 28, 2021
(Electronic) Receipt
Appeal
Sep 28, 2021
Sep 28, 2021
Notice of appeal
Appeal
Jul 30, 2021
Jul 30, 2021
Jul 30, 2021
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Jul 30, 2021
Means of redress
OPPO
Jul 30, 2021
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Jul 23, 2018
Jun 14, 2018
Decision to grant a European patent
Search/Exam
May 31, 2018
(Electronic) Receipt
Search/Exam
May 31, 2018
English translation of the claims
Search/Exam
May 31, 2018
Filing of the translations of the claims
Search/Exam
May 31, 2018
German translation of the claims
Search/Exam
May 31, 2018
Letter accompanying subsequently filed items
Search/Exam
Feb 8, 2018
Feb 8, 2018
Feb 8, 2018
Intention to grant (signatures)
Search/Exam
Feb 8, 2018
Text intended for grant (clean copy)
Search/Exam
Feb 8, 2018
Jul 13, 2016
Jul 7, 2016
Jan 8, 2016
(Electronic) Receipt
Search/Exam
Jan 8, 2016
Amended claims with annotations
Search/Exam
Jan 8, 2016
Claims
Search/Exam
Jan 8, 2016
Letter accompanying subsequently filed items
Search/Exam
Jan 8, 2016
Nov 13, 2015
Nov 6, 2015
(Electronic) Receipt
Search/Exam
Nov 6, 2015
Letter accompanying subsequently filed items
Search/Exam
Nov 6, 2015
Sep 8, 2015
Annex to the communication
Search/Exam
Sep 8, 2015
Communication from the Examining Division
Search/Exam
Jul 23, 2015
(Electronic) Receipt
Search/Exam
Jul 23, 2015
Amended claims with annotations
Search/Exam
Jul 23, 2015
Amended description with annotations
Search/Exam
Jul 23, 2015
Claims
Search/Exam
Jul 23, 2015
Description
Search/Exam
Jul 23, 2015
Letter accompanying subsequently filed items
Search/Exam
Jul 23, 2015
May 28, 2015
May 22, 2015
(Electronic) Receipt
Search/Exam
May 22, 2015
Letter accompanying subsequently filed items
Search/Exam
May 22, 2015
Mar 25, 2015
Annex to the communication
Search/Exam
Mar 25, 2015
Communication from the Examining Division
Search/Exam
Mar 19, 2015
Examination started
Search/Exam
Feb 4, 2015
Refund of fees
Search/Exam
Jan 23, 2015
(Electronic) Receipt
Search/Exam
Jan 23, 2015
Jan 23, 2015
Amended claims with annotations
Search/Exam
Jan 23, 2015
Amendments received before examination
Search/Exam
Jan 23, 2015
Letter accompanying subsequently filed items
Search/Exam
Sep 24, 2014
Jul 23, 2014
Jul 21, 2014
Communication to designated inventor
Search/Exam
Jul 21, 2014
Communication to designated inventor
Search/Exam
Jul 16, 2014
Priority search results copy provided by EPO
Search/Exam
Jul 3, 2014
Jun 6, 2014
(Electronic) Receipt
Search/Exam
Jun 6, 2014
Request for entry into the European phase
Search/Exam
Apr 25, 2014
Information on entry into European phase
Search/Exam
Jul 11, 2013
Jun 20, 2013
Copy of the international search report
Search/Exam
Jun 20, 2013
Copy of the international search report
Search/Exam
Jun 20, 2013
Published international application - A1
Search/Exam
Apr 5, 2013
Annex
PCTRO
Feb 19, 2013
Feb 19, 2013
Feb 19, 2013
Dec 17, 2012
(Electronic) Receipt
PCTRO
Dec 17, 2012
Abstract
PCTRO
Dec 17, 2012
Claims
PCTRO
Dec 17, 2012
Description
PCTRO