The weekly litigation news digest is live. Subscribe now
The patent EP3983812 was granted to Magnetec on Oct 12, 2022. The application was filed on Jun 15, 2021 under application number EP21734080A. 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 |
|---|---|---|---|
| VACUUMSCHMELZE | Jul 6, 2023 | WESTPHAL | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | EP1696444 |
| INTERNATIONAL-SEARCH-REPORT | DE69412149T |
| INTERNATIONAL-SEARCH-REPORT | US2011116197 |
| INTERNATIONAL-SEARCH-REPORT | US2015301087 |
| OPPOSITION | DE102011080003 |
| OPPOSITION | DE69412149T |
| OPPOSITION | EP1696444 |
| OPPOSITION | US2011116197 |
| OPPOSITION | US2015301087 |
| OPPOSITION | US3701003 |
| OPPOSITION | US5770992 |
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
Dec 23, 2025
Dec 19, 2025
Brief communication
Appeal
Dec 19, 2025
Dec 18, 2025
(Electronic) Receipt
Search/Exam
Dec 18, 2025
Annex
Search/Exam
Dec 18, 2025
Annex
Search/Exam
Dec 18, 2025
Letter accompanying subsequently filed items
Search/Exam
Dec 10, 2025
Nov 11, 2025
Nov 6, 2025
(Electronic) Receipt
Appeal
Nov 6, 2025
Nov 6, 2025
Nov 3, 2025
Nov 3, 2025
Oct 31, 2025
Oct 29, 2025
Oct 27, 2025
(Electronic) Receipt
Appeal
Oct 27, 2025
Oct 27, 2025
Notice of appeal
Appeal
Oct 24, 2025
(Electronic) Receipt
Appeal
Oct 24, 2025
Annex
Appeal
Oct 24, 2025
Annex
Appeal
Oct 24, 2025
Oct 24, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Means of redress
OPPO
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Aug 27, 2025
Jul 9, 2025
Jun 30, 2025
Jun 25, 2025
Jun 25, 2025
Jun 25, 2025
Jun 25, 2025
Jun 25, 2025
Jun 25, 2025
Jun 25, 2025
May 13, 2025
May 13, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
May 8, 2025
Sep 23, 2024
Sep 23, 2024
Sep 16, 2024
Sep 12, 2024
Sep 9, 2024
Sep 9, 2024
Sep 9, 2024
Sep 5, 2024
Sep 3, 2024
Sep 2, 2024
Aug 28, 2024
Aug 14, 2024
Aug 14, 2024
Aug 14, 2024
Aug 14, 2024
Aug 14, 2024
Aug 14, 2024
Aug 14, 2024
Aug 14, 2024
Aug 9, 2024
Aug 6, 2024
Aug 6, 2024
Aug 6, 2024
Aug 6, 2024
Aug 1, 2024
Jul 31, 2024
Jul 31, 2024
Jul 31, 2024
Jul 31, 2024
Jul 30, 2024
Jul 30, 2024
Jul 30, 2024
Jul 26, 2024
Mar 11, 2024
Dec 7, 2023
Dec 4, 2023
Dec 4, 2023
Dec 4, 2023
Dec 4, 2023
Dec 4, 2023
Dec 4, 2023
Dec 4, 2023
Jul 24, 2023
Jul 24, 2023
Jul 12, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jul 6, 2023
Jan 2, 2023
Jan 2, 2023
Dec 1, 2022
Dec 1, 2022
Notification of the recording of a change
Search/Exam
Nov 29, 2022
Nov 21, 2022
Annexes in respect of a client data request
Search/Exam
Nov 21, 2022
Nov 21, 2022
Oct 25, 2022
Sep 15, 2022
Decision to grant a European patent
Search/Exam
Sep 2, 2022
(Electronic) Receipt
Search/Exam
Sep 2, 2022
English translation of the claims
Search/Exam
Sep 2, 2022
Filing of the translations of the claims
Search/Exam
Sep 2, 2022
French translation of claims
Search/Exam
Sep 2, 2022
Letter accompanying subsequently filed items
Search/Exam
Aug 4, 2022
Intention to grant (signatures)
Search/Exam
Aug 3, 2022
Aug 3, 2022
Aug 3, 2022
Text intended for grant (clean copy)
Search/Exam
Aug 3, 2022
Jun 7, 2022
(Electronic) Receipt
Search/Exam
Jun 7, 2022
Amended claims with annotations
Search/Exam
Jun 7, 2022
Amended description with annotations
Search/Exam
Jun 7, 2022
Claims
Search/Exam
Jun 7, 2022
Description
Search/Exam
Jun 7, 2022
Letter accompanying subsequently filed items
Search/Exam
Jun 7, 2022
Apr 29, 2022
Annex to the communication
Search/Exam
Apr 29, 2022
Communication from the Examining Division
Search/Exam
Apr 21, 2022
Examination started
Search/Exam
Mar 23, 2022
Jan 24, 2022
Jan 17, 2022
(Electronic) Receipt
Search/Exam
Jan 17, 2022
Jan 17, 2022
Priority search results
Search/Exam
Jan 17, 2022
Request for entry into the European phase
Search/Exam
Dec 30, 2021
Copy of the international search report
Search/Exam
Dec 30, 2021
Copy of the international search report
Search/Exam
Dec 30, 2021
Notification of election of EPO
Search/Exam
Dec 30, 2021
Published international application - A1
Search/Exam
Dec 14, 2021
Dec 14, 2021
Dec 14, 2021
Dec 14, 2021
Dec 14, 2021
Dec 14, 2021
Dec 14, 2021
Dec 7, 2021
Nov 30, 2021
Nov 30, 2021
PCT demand form
PCT2
Nov 30, 2021
Nov 30, 2021
Nov 30, 2021
Nov 30, 2021
Oct 7, 2021
Jul 6, 2021
Jul 6, 2021
Jul 1, 2021
Jun 15, 2021
(Electronic) Receipt
PCTRO
Jun 15, 2021
Abstract
PCTRO
Jun 15, 2021
Claims
PCTRO
Jun 15, 2021
Description
PCTRO
Jun 15, 2021
Jun 15, 2021
Drawings
PCTRO
Jun 15, 2021