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The patent EP3375939 was granted to Schell on Aug 4, 2021. The application was filed on Feb 27, 2018 under application number EP18158823A. 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 |
|---|---|---|---|
| VIEGA TECHNOLOGY | May 2, 2022 | COHAUSZ & FLORACK | ADMISSIBLE |
| KWC AQUAROTTER | Mar 29, 2022 | WITTE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE102004033307 |
| OPPOSITION | DE102004035442 |
| OPPOSITION | DE102017105449 |
| OPPOSITION | DE202007009349U |
| OPPOSITION | DE3916195 |
| OPPOSITION | DE4225834 |
| OPPOSITION | DE4413126 |
| OPPOSITION | DE9313983U |
| OPPOSITION | EP1309760 |
| OPPOSITION | EP1845207 |
| OPPOSITION | EP3375939 |
| OPPOSITION | GB2478124 |
| OPPOSITION | GB2502165 |
| OPPOSITION | US2013047327 |
| OPPOSITION | US2015308084 |
| OPPOSITION | WO2012098383 |
| OPPOSITION | WO2016107937 |
| OPPOSITION | WO2016116407 |
| SEARCH | EP1845207 |
| SEARCH | GB2502165 |
| SEARCH | WO2016107937 |
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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Dec 23, 2025
(Electronic) Receipt
Appeal
Dec 23, 2025
Notice of appeal
Appeal
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Notice of appeal
Appeal
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OPPO
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Aug 17, 2021
Jul 8, 2021
Decision to grant a European patent
Search/Exam
Jun 24, 2021
(Electronic) Receipt
Search/Exam
Jun 24, 2021
English translation of the claims
Search/Exam
Jun 24, 2021
French translation of claims
Search/Exam
Jun 24, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 23, 2021
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Intention to grant (signatures)
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Mar 23, 2021
Text intended for grant (clean copy)
Search/Exam
Mar 23, 2021
Mar 9, 2021
Examination started
Search/Exam
Feb 25, 2021
(Electronic) Receipt
Search/Exam
Feb 25, 2021
Letter concerning fees and payments
Search/Exam
Feb 24, 2020
(Electronic) Receipt
Search/Exam
Feb 24, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 1, 2019
Decision to allow further processing
Search/Exam
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Amended description with annotations
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Mar 21, 2019
Request for further processing
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Mar 20, 2019
(Electronic) Receipt
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Amended description with annotations
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Mar 20, 2019
Letter accompanying subsequently filed items
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Mar 20, 2019
Request for further processing
Search/Exam
Oct 2, 2018
Letter concerning the priority
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Oct 2, 2018
Priority document
Search/Exam
Sep 24, 2018
Sep 17, 2018
Invitation to file priority document
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Aug 22, 2018
Notification of forthcoming publication
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Jul 17, 2018
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European search opinion
Search/Exam
Jul 17, 2018
European search report
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Jul 17, 2018
Information on Search Strategy
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Jul 6, 2018
Search started
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Apr 23, 2018
Communication to designated inventor
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Communication to designated inventor
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Apr 23, 2018
Communication to designated inventor
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Mar 8, 2018
Designation of inventor
Search/Exam
Mar 8, 2018
Letter concerning the inventor
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Feb 27, 2018
Abstract
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Feb 27, 2018
Feb 27, 2018
Claims
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Feb 27, 2018
Description
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Feb 27, 2018
Designation of inventor
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Feb 27, 2018
Drawings
Search/Exam
Feb 27, 2018
Priority search results
Search/Exam
Feb 27, 2018
Request for grant of a European patent
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