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The patent EP3640521 was granted to Leuze Electronic on May 31, 2023. The application was originally filed on Oct 17, 2018 under application number EP18200990A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE102005010376 |
| OPPOSITION | DE102014115421 |
| OPPOSITION | DE102017113392 |
| OPPOSITION | DE10238759 |
| OPPOSITION | DE202008003988U |
| OPPOSITION | US2013346019 |
| SEARCH | DE102005010376 |
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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Sep 29, 2025
Sep 29, 2025
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Means of redress
OPPO
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Authorisation
OPPO
Aug 7, 2025
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Description
OPPO
Jul 3, 2025
Description
OPPO
Jul 3, 2025
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Jun 19, 2025
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Jun 17, 2025
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Jun 14, 2023
May 8, 2023
Decision to grant a European patent
Search/Exam
Apr 17, 2023
(Electronic) Receipt
Search/Exam
Apr 17, 2023
English translation of the claims
Search/Exam
Apr 17, 2023
Filing of the translations of the claims
Search/Exam
Apr 17, 2023
French translation of claims
Search/Exam
Apr 17, 2023
Letter accompanying subsequently filed items
Search/Exam
Feb 14, 2023
Feb 14, 2023
Feb 14, 2023
Feb 14, 2023
Intention to grant (signatures)
Search/Exam
Feb 14, 2023
Text intended for grant (clean copy)
Search/Exam
Feb 14, 2023
Sep 20, 2022
(Electronic) Receipt
Search/Exam
Sep 20, 2022
Amended claims with annotations
Search/Exam
Sep 20, 2022
Amended description with annotations
Search/Exam
Sep 20, 2022
Claims
Search/Exam
Sep 20, 2022
Description
Search/Exam
Sep 20, 2022
Letter accompanying subsequently filed items
Search/Exam
Sep 20, 2022
Jun 1, 2022
Annex to the communication
Search/Exam
Jun 1, 2022
Communication from the Examining Division
Search/Exam
May 25, 2022
Examination started
Search/Exam
Oct 15, 2021
(Electronic) Receipt
Search/Exam
Oct 15, 2021
Letter concerning fees and payments
Search/Exam
Oct 19, 2020
Oct 19, 2020
Amended description with annotations
Search/Exam
Oct 19, 2020
Amendments received before examination
Search/Exam
Oct 5, 2020
(Electronic) Receipt
Search/Exam
Oct 5, 2020
Letter concerning fees and payments
Search/Exam
Apr 28, 2020
Mar 25, 2020
Notification of forthcoming publication
Search/Exam
May 23, 2019
(Electronic) Receipt
Search/Exam
May 23, 2019
Letter accompanying subsequently filed items
Search/Exam
May 23, 2019
Letter concerning fees and payments
Search/Exam
Apr 30, 2019
Apr 30, 2019
European search opinion
Search/Exam
Apr 30, 2019
European search report
Search/Exam
Apr 30, 2019
Information on Search Strategy
Search/Exam
Apr 17, 2019
Search started
Search/Exam
Dec 10, 2018
Communication to designated inventor
Search/Exam
Oct 17, 2018
Abstract
Search/Exam
Oct 17, 2018
Oct 17, 2018
Claims
Search/Exam
Oct 17, 2018
Description
Search/Exam
Oct 17, 2018
Designation of inventor
Search/Exam
Oct 17, 2018
Drawings
Search/Exam
Oct 17, 2018
Request for grant of a European patent
Search/Exam