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The patent EP3520758 was granted to Sandler on Nov 18, 2020. The application was filed on Jan 18, 2019 under application number EP19152570A. 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 |
|---|---|---|---|
| TWE MEULEBEKE | Aug 13, 2021 | KIRKPATRICK | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE10103627 |
| DESCRIPTION | DE102012015219 |
| DESCRIPTION | DE102016005158 |
| OPPOSITION | BE1018052 |
| OPPOSITION | EP3238680 |
| SEARCH | EP0704000 |
| SEARCH | EP0873737 |
| SEARCH | EP3238680 |
| SEARCH | US4883707 |
| SEARCH | US5486166 |
| SEARCH | WO2017095399 |
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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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Jun 5, 2025
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(Electronic) Receipt
Appeal
Jan 24, 2024
Jan 24, 2024
Reply to appeal
Appeal
Sep 15, 2023
Sep 11, 2023
(Electronic) Receipt
Appeal
Sep 11, 2023
Sep 11, 2023
Sep 11, 2023
Jul 28, 2023
Jul 28, 2023
Jul 18, 2023
(Electronic) Receipt
Appeal
Jul 18, 2023
Jul 18, 2023
Notice of appeal
Appeal
Jul 11, 2023
(Electronic) Receipt
Appeal
Jul 11, 2023
May 12, 2023
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Means of redress
OPPO
May 12, 2023
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Nov 30, 2020
Oct 22, 2020
Decision to grant a European patent
Search/Exam
Oct 13, 2020
(Electronic) Receipt
Search/Exam
Oct 13, 2020
English translation of the claims
Search/Exam
Oct 13, 2020
Filing of the translations of the claims
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Oct 13, 2020
French translation of claims
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Oct 12, 2020
Oct 7, 2020
Oct 6, 2020
(Electronic) Receipt
Search/Exam
Oct 6, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 6, 2020
Jun 16, 2020
Jun 16, 2020
Jun 16, 2020
Intention to grant (signatures)
Search/Exam
Jun 16, 2020
Text intended for grant (clean copy)
Search/Exam
Jun 16, 2020
May 19, 2020
Annex to the communication
Search/Exam
May 19, 2020
Consultation by telephone/in person
Search/Exam
May 19, 2020
May 18, 2020
(Electronic) Receipt
Search/Exam
May 18, 2020
Amended claims with annotations
Search/Exam
May 18, 2020
Amended description with annotations
Search/Exam
May 18, 2020
Claims
Search/Exam
May 18, 2020
Description
Search/Exam
May 18, 2020
Examination started
Search/Exam
May 18, 2020
Letter accompanying subsequently filed items
Search/Exam
May 18, 2020
Apr 23, 2020
(Electronic) Receipt
Search/Exam
Apr 23, 2020
(Electronic) Receipt
Search/Exam
Apr 23, 2020
Amended claims with annotations
Search/Exam
Apr 23, 2020
Amended description with annotations
Search/Exam
Apr 23, 2020
Claims
Search/Exam
Apr 23, 2020
Description
Search/Exam
Apr 23, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 23, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 23, 2020
Priority search results
Search/Exam
Apr 23, 2020
Apr 23, 2020
Feb 18, 2020
Feb 4, 2020
(Electronic) Receipt
Search/Exam
Feb 4, 2020
Feb 4, 2020
Amended claims with annotations
Search/Exam
Feb 4, 2020
Feb 4, 2020
Amended description with annotations
Search/Exam
Feb 4, 2020
Amendments received before examination
Search/Exam
Feb 4, 2020
Letter accompanying subsequently filed items
Search/Exam
Jan 31, 2020
Jan 3, 2020
Observations by third parties
Search/Exam
Jan 3, 2020
Patent document filed by a Third party
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Jan 3, 2020
Patent document filed by a Third party
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Jan 3, 2020
Patent document filed by a Third party
Search/Exam
Jan 3, 2020
Patent document filed by a Third party
Search/Exam
Jan 3, 2020
Patent document filed by a Third party
Search/Exam
Aug 12, 2019
Jul 10, 2019
Notification of forthcoming publication
Search/Exam
May 10, 2019
May 10, 2019
European search opinion
Search/Exam
May 10, 2019
European search report
Search/Exam
May 10, 2019
Information on Search Strategy
Search/Exam
Apr 30, 2019
Communication to designated inventor
Search/Exam
Apr 23, 2019
(Electronic) Receipt
Search/Exam
Apr 23, 2019
Letter accompanying subsequently filed items
Search/Exam
Apr 23, 2019
Letter concerning the inventor
Search/Exam
Apr 15, 2019
Search started
Search/Exam
Apr 9, 2019
Apr 1, 2019
Letter which had not been notified
Search/Exam
Mar 13, 2019
Communication to designated inventor
Search/Exam
Mar 13, 2019
Communication to designated inventor
Search/Exam
Mar 13, 2019
Communication to designated inventor
Search/Exam
Mar 13, 2019
Communication to designated inventor
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Jan 21, 2019
Letter concerning the priority
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Jan 21, 2019
Priority document
Search/Exam
Jan 18, 2019
Abstract
Search/Exam
Jan 18, 2019
Jan 18, 2019
Claims
Search/Exam
Jan 18, 2019
Description
Search/Exam
Jan 18, 2019
Designation of inventor
Search/Exam
Jan 18, 2019
Request for grant of a European patent
Search/Exam