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The patent EP3437942 was granted to Washtec Holding on Mar 3, 2021. The application was filed on Aug 14, 2015 under application number EP18195973A. 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 |
|---|---|---|---|
| ALFRED KARCHER | Dec 3, 2021 | DTS PATENT UND RECHTSANWALTE PARTMBB | ADMISSIBLE |
| OTTO CHRIST | Dec 3, 2021 | ERNICKE PATENT UND RECHTSANWALTE PARTMBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DD261486 |
| OPPOSITION | DE102010011953 |
| OPPOSITION | DE102010014180 |
| OPPOSITION | DE102014112388 |
| OPPOSITION | DE1936889 |
| OPPOSITION | DE19524748 |
| OPPOSITION | DE19959491 |
| OPPOSITION | DE2349861 |
| OPPOSITION | DE29814758U |
| OPPOSITION | DE4334132 |
| OPPOSITION | EP0808753 |
| OPPOSITION | EP0980802 |
| OPPOSITION | EP3186115 |
| OPPOSITION | EP3842299 |
| OPPOSITION | JP2004243840 |
| OPPOSITION | JP2005225407 |
| OPPOSITION | JP2008094250 |
| OPPOSITION | JP3066420B |
| OPPOSITION | JPH01164654 |
| OPPOSITION | JPH0379455 |
| OPPOSITION | JPH05213163 |
| OPPOSITION | JPH066136U |
| OPPOSITION | JPH08332921 |
| OPPOSITION | JPH11129873 |
| OPPOSITION | US5930859 |
| OPPOSITION | WO03031241 |
| SEARCH | DE19524748 |
| SEARCH | DE29814758U |
| SEARCH | JP3066420B |
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 5, 2025
Nov 25, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Appeal
Feb 11, 2025
(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
Feb 11, 2025
Reply to appeal
Appeal
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Appeal
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Appeal
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Notice of appeal
Appeal
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Appeal
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Decision to grant a European patent
Search/Exam
Jan 26, 2021
(Electronic) Receipt
Search/Exam
Jan 26, 2021
English translation of the claims
Search/Exam
Jan 26, 2021
Filing of the translations of the claims
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Jan 26, 2021
French translation of claims
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Jan 26, 2021
Letter accompanying subsequently filed items
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Sep 16, 2020
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Intention to grant (signatures)
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Sep 16, 2020
Text intended for grant (clean copy)
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Sep 16, 2020
May 27, 2020
(Electronic) Receipt
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May 27, 2020
Amended claims with annotations
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May 27, 2020
Amended description with annotations
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May 27, 2020
Claims
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May 27, 2020
Description
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May 27, 2020
Letter accompanying subsequently filed items
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May 27, 2020
Apr 29, 2020
Apr 21, 2020
(Electronic) Receipt
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Apr 21, 2020
Letter accompanying subsequently filed items
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Apr 21, 2020
Dec 11, 2019
Annex to the communication
Search/Exam
Dec 11, 2019
Communication from the Examining Division
Search/Exam
Dec 4, 2019
Examination started
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Jun 13, 2019
(Electronic) Receipt
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Jun 13, 2019
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Amended claims with annotations
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Jun 13, 2019
Amendments received before examination
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Jun 13, 2019
Letter accompanying subsequently filed items
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Feb 11, 2019
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Notification of forthcoming publication
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Dec 12, 2018
Refund of fees
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Dec 5, 2018
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European search opinion
Search/Exam
Dec 5, 2018
European search report
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Dec 5, 2018
Information on Search Strategy
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Nov 28, 2018
Search started
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Nov 14, 2018
Communication to designated inventor
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Nov 14, 2018
Communication to designated inventor
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Nov 14, 2018
Communication to designated inventor
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Sep 21, 2018
Abstract
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Sep 21, 2018
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Claims
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Sep 21, 2018
Description
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Sep 21, 2018
Designation of inventor
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Sep 21, 2018
Drawings
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Sep 21, 2018
Priority search results
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Sep 21, 2018
Request for grant of a European patent
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Nov 28, 2017
Priority search results copy provided by EPO
Search/Exam
Mar 22, 2016