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The patent EP3708522 was granted to Siempelkamp Maschinen UND Anlagenbau on Aug 21, 2024. The application was filed on Feb 18, 2020 under application number EP20157821A. 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 |
|---|---|---|---|
| DIEFFENBACHER MASCHINEN UND ANLAGENBAU | Jun 8, 2022 | LBP LEMCKE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | AT268144B |
| OPPOSITION | DD256495 |
| OPPOSITION | DE102006015020 |
| OPPOSITION | DE1917062 |
| OPPOSITION | DE1918988 |
| OPPOSITION | DE1925780 |
| OPPOSITION | DE19963021 |
| OPPOSITION | DE202018004698U |
| OPPOSITION | DE2815459 |
| OPPOSITION | DE3915139 |
| OPPOSITION | DE4328501 |
| OPPOSITION | EP1900658 |
| OPPOSITION | US2981399 |
| OPPOSITION | US3712608 |
| OPPOSITION | US4499987 |
| OPPOSITION | US5421446 |
| OPPOSITION | WO2015024935 |
| OPPOSITION | WO2017191257 |
| SEARCH | DE19963021 |
| SEARCH | US2981399 |
| SEARCH | US5421446 |
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 25, 2024
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Jun 26, 2024
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Refund of fees
Appeal
May 31, 2024
May 31, 2024
May 28, 2024
May 27, 2024
(Electronic) Receipt
Appeal
May 27, 2024
May 27, 2024
May 27, 2024
Withdrawal of an appeal
Appeal
Apr 12, 2024
Apr 8, 2024
(Electronic) Receipt
Appeal
Apr 8, 2024
Apr 8, 2024
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Mar 26, 2024
(Electronic) Receipt
Appeal
Mar 26, 2024
Mar 26, 2024
Notice of appeal
Appeal
Jan 31, 2024
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Means of redress
OPPO
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Sep 21, 2021
Aug 12, 2021
Decision to grant a European patent
Search/Exam
Jul 29, 2021
(Electronic) Receipt
Search/Exam
Jul 29, 2021
English translation of the claims
Search/Exam
Jul 29, 2021
Filing of the translations of the claims
Search/Exam
Jul 29, 2021
French translation of claims
Search/Exam
Jul 29, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 18, 2021
(Electronic) Receipt
Search/Exam
Jun 18, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 20, 2021
Apr 20, 2021
Apr 20, 2021
Intention to grant (signatures)
Search/Exam
Apr 20, 2021
Text intended for grant (clean copy)
Search/Exam
Apr 20, 2021
Feb 19, 2021
Examination started
Search/Exam
Oct 9, 2020
(Electronic) Receipt
Search/Exam
Oct 9, 2020
Amendments received before examination
Search/Exam
Oct 9, 2020
Letter concerning fees and payments
Search/Exam
Sep 21, 2020
Aug 19, 2020
Notification of forthcoming publication
Search/Exam
Aug 6, 2020
Aug 6, 2020
European search opinion
Search/Exam
Aug 6, 2020
European search report
Search/Exam
Aug 6, 2020
Information on Search Strategy
Search/Exam
Apr 14, 2020
Communication to designated inventor
Search/Exam
Apr 14, 2020
Communication to designated inventor
Search/Exam
Apr 14, 2020
Communication to designated inventor
Search/Exam
Apr 14, 2020
Communication to designated inventor
Search/Exam
Feb 24, 2020
Letter concerning the priority
Search/Exam
Feb 24, 2020
Priority document
Search/Exam
Feb 18, 2020
Abstract
Search/Exam
Feb 18, 2020
Feb 18, 2020
Claims
Search/Exam
Feb 18, 2020
Description
Search/Exam
Feb 18, 2020
Designation of inventor
Search/Exam
Feb 18, 2020
Drawings
Search/Exam
Feb 18, 2020
Priority search results
Search/Exam
Feb 18, 2020
Request for grant of a European patent
Search/Exam