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The patent EP3851806 was granted to Leuze Electronic on Jan 11, 2023. The application was filed on Jan 15, 2020 under application number EP20152049A. 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 |
|---|---|---|---|
| PEPPERLFUCHS | Oct 9, 2023 | SCHIFFER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1586866 |
| OPPOSITION | CN109900265 |
| OPPOSITION | CN110095116 |
| OPPOSITION | CN110260860 |
| OPPOSITION | DE102006041799 |
| OPPOSITION | DE102008032786 |
| OPPOSITION | DE102010008957 |
| OPPOSITION | DE102012216218 |
| OPPOSITION | DE19532104 |
| OPPOSITION | EP1586866 |
| OPPOSITION | EP2037224 |
| OPPOSITION | EP2487464 |
| OPPOSITION | EP3470878 |
| OPPOSITION | US10416276 |
| OPPOSITION | US2005182518 |
| OPPOSITION | US2006244830 |
| OPPOSITION | US2011025562 |
| OPPOSITION | US5332180 |
| OPPOSITION | WO2013003277 |
| SEARCH | DE102006041799 |
| SEARCH | DE102008032786 |
| SEARCH | EP2037224 |
| SEARCH | EP2487464 |
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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Nov 4, 2025
Oct 30, 2025
(Electronic) Receipt
Appeal
Oct 30, 2025
Oct 30, 2025
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Reply to appeal
Appeal
Sep 23, 2025
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Jun 26, 2025
(Electronic) Receipt
Appeal
Jun 26, 2025
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(Electronic) Receipt
Appeal
Apr 22, 2025
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Notice of appeal
Appeal
Feb 26, 2025
Feb 26, 2025
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Means of redress
OPPO
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Jan 24, 2023
Dec 15, 2022
Decision to grant a European patent
Search/Exam
Dec 8, 2022
Dec 2, 2022
(Electronic) Receipt
Search/Exam
Dec 2, 2022
English translation of the claims
Search/Exam
Dec 2, 2022
Filing of the translations of the claims
Search/Exam
Dec 2, 2022
French translation of claims
Search/Exam
Dec 2, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 7, 2022
Intention to grant (signatures)
Search/Exam
Nov 3, 2022
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Text intended for grant (clean copy)
Search/Exam
Nov 3, 2022
Oct 18, 2022
Examination started
Search/Exam
Jan 27, 2022
(Electronic) Receipt
Search/Exam
Jan 27, 2022
Letter concerning fees and payments
Search/Exam
Dec 8, 2021
(Electronic) Receipt
Search/Exam
Dec 8, 2021
Dec 8, 2021
Amended claims with annotations
Search/Exam
Dec 8, 2021
Dec 8, 2021
Amended description with annotations
Search/Exam
Dec 8, 2021
Amendments received before examination
Search/Exam
Dec 8, 2021
Letter accompanying subsequently filed items
Search/Exam
Jul 26, 2021
Jun 23, 2021
Notification of forthcoming publication
Search/Exam
Aug 4, 2020
(Electronic) Receipt
Search/Exam
Aug 4, 2020
Letter accompanying subsequently filed items
Search/Exam
Aug 4, 2020
Letter concerning fees and payments
Search/Exam
Jul 15, 2020
Jul 15, 2020
European search opinion
Search/Exam
Jul 15, 2020
European search report
Search/Exam
Jul 15, 2020
Information on Search Strategy
Search/Exam
Jul 2, 2020
Search started
Search/Exam
Mar 9, 2020
Communication to designated inventor
Search/Exam
Mar 9, 2020
Communication to designated inventor
Search/Exam
Jan 15, 2020
Abstract
Search/Exam
Jan 15, 2020
Jan 15, 2020
Claims
Search/Exam
Jan 15, 2020
Description
Search/Exam
Jan 15, 2020
Designation of inventor
Search/Exam
Jan 15, 2020
Drawings
Search/Exam
Jan 15, 2020
Request for grant of a European patent
Search/Exam