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The patent EP3640304 was granted to DAW on Jan 26, 2022. The application was filed on Oct 18, 2018 under application number EP18201317A. 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 |
|---|---|---|---|
| WACHTERSHAUSER & HARTZ PATENTANWALTSPARTNERSCHAFT MBB | Oct 26, 2022 | WACHTERSHAUSER & HARTZ PATENTANWALTSPARTNERSCHAFT MBB | ADMISSIBLE |
| EWALD DORKEN | Oct 25, 2022 | VON ROHR PATENTANWALTE PARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE3713495 |
| DESCRIPTION | DE4211248 |
| DESCRIPTION | DE69622556T |
| OPPOSITION | CN106118436 |
| OPPOSITION | DE19711418 |
| OPPOSITION | DE4200914 |
| OPPOSITION | DE9314230U |
| OPPOSITION | EP1475421 |
| OPPOSITION | EP1609379 |
| OPPOSITION | EP2589579 |
| OPPOSITION | EP2754699 |
| OPPOSITION | EP2905268 |
| OPPOSITION | EP3301138 |
| OPPOSITION | EP3385046 |
| OPPOSITION | WO2004046261 |
| OPPOSITION | WO2005111100 |
| OPPOSITION | WO2011095202 |
| OPPOSITION | WO2013050253 |
| OPPOSITION | WO2014108491 |
| OPPOSITION | WO2014201674 |
| OPPOSITION | WO2018029051 |
| OPPOSITION | WO9735818 |
| SEARCH | CN106118436 |
| SEARCH | EP1609379 |
| SEARCH | EP3385046 |
| SEARCH | WO2004046261 |
| SEARCH | WO2005111100 |
| SEARCH | WO2013050253 |
| SEARCH | WO2014108491 |
| SEARCH | WO2018029051 |
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 15, 2025
Sep 15, 2025
Sep 10, 2025
(Electronic) Receipt
Appeal
Sep 10, 2025
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(Electronic) Receipt
Appeal
Jun 5, 2025
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Reply to appeal
Appeal
Jun 4, 2025
(Electronic) Receipt
Appeal
Jun 4, 2025
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Reply to appeal
Appeal
Feb 6, 2025
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Jan 31, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Jan 29, 2025
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(Electronic) Receipt
Appeal
Dec 2, 2024
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Notice of appeal
Appeal
Nov 29, 2024
(Electronic) Receipt
Appeal
Nov 29, 2024
Notice of appeal
Appeal
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Feb 8, 2022
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Decision to grant a European patent
Search/Exam
Dec 16, 2021
(Electronic) Receipt
Search/Exam
Dec 16, 2021
English translation of the claims
Search/Exam
Dec 16, 2021
Filing of the translations of the claims
Search/Exam
Dec 16, 2021
French translation of claims
Search/Exam
Dec 16, 2021
Letter accompanying subsequently filed items
Search/Exam
Oct 7, 2021
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Intention to grant (signatures)
Search/Exam
Oct 7, 2021
Text intended for grant (clean copy)
Search/Exam
Oct 7, 2021
Aug 20, 2021
(Electronic) Receipt
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Aug 20, 2021
Amended description with annotations
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Aug 20, 2021
Description
Search/Exam
Aug 20, 2021
Letter accompanying subsequently filed items
Search/Exam
Aug 20, 2021
Jun 16, 2021
Annex to the communication
Search/Exam
Jun 16, 2021
Communication from the Examining Division
Search/Exam
Jun 7, 2021
(Electronic) Receipt
Search/Exam
Jun 7, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 7, 2021
Feb 3, 2021
Annex to the communication
Search/Exam
Feb 3, 2021
Communication from the Examining Division
Search/Exam
Jan 27, 2021
Examination started
Search/Exam
Jan 25, 2021
Decision to allow further processing
Search/Exam
Jan 12, 2021
(Electronic) Receipt
Search/Exam
Jan 12, 2021
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Amended claims with annotations
Search/Exam
Jan 12, 2021
Letter accompanying subsequently filed items
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Jan 12, 2021
Request for further processing
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Nov 13, 2020
Oct 22, 2020
(Electronic) Receipt
Search/Exam
Oct 22, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 22, 2020
Matter concerning the application
Search/Exam
Apr 28, 2020
Mar 25, 2020
Notification of forthcoming publication
Search/Exam
Feb 26, 2020
Communication to designated inventor
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Feb 26, 2020
Communication to designated inventor
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Feb 14, 2020
(Electronic) Receipt
Search/Exam
Feb 14, 2020
Designation of inventor
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Feb 14, 2020
Letter accompanying subsequently filed items
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Feb 14, 2020
Letter concerning the inventor
Search/Exam
Apr 8, 2019
Apr 8, 2019
European search opinion
Search/Exam
Apr 8, 2019
European search report
Search/Exam
Apr 8, 2019
Information on Search Strategy
Search/Exam
Nov 15, 2018
Deficiency in designation of inventor
Search/Exam
Oct 18, 2018
Abstract
Search/Exam
Oct 18, 2018
Oct 18, 2018
Claims
Search/Exam
Oct 18, 2018
Description
Search/Exam
Oct 18, 2018
Request for grant of a European patent
Search/Exam