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The patent EP3428453 was granted to Grundfos Holding on Jun 7, 2023. The application was filed on Jul 14, 2017 under application number EP17181340A. 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 |
|---|---|---|---|
| KSB | Mar 7, 2024 | VON TIETZEN UND HENNIG | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2003235492 |
| DESCRIPTION | US2015148972 |
| DESCRIPTION | US7480544 |
| EXAMINATION | JPH10103252 |
| OPPOSITION | DE102014222962 |
| OPPOSITION | DE2004206 |
| OPPOSITION | EP0735273 |
| OPPOSITION | EP0905596 |
| OPPOSITION | EP2469094 |
| OPPOSITION | EP2940309 |
| OPPOSITION | US8328523 |
| OPPOSITION | US9091259 |
| OPPOSITION | WO2008121051 |
| SEARCH | EP0735273 |
| SEARCH | EP0905596 |
| SEARCH | EP2469094 |
| SEARCH | EP2940309 |
| SEARCH | WO2008121051 |
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 20, 2025
Nov 20, 2025
Nov 14, 2025
Nov 10, 2025
(Electronic) Receipt
Appeal
Nov 10, 2025
Nov 10, 2025
Oct 22, 2025
Oct 22, 2025
Sep 17, 2025
Sep 17, 2025
Sep 8, 2025
(Electronic) Receipt
Appeal
Sep 8, 2025
Sep 8, 2025
Notice of appeal
Appeal
Sep 8, 2025
Notice of appeal
Appeal
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Means of redress
OPPO
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 8, 2025
Jul 4, 2025
Jun 17, 2025
Apr 29, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Feb 20, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Feb 12, 2025
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Information concerning oral proceedings
Search/Exam
Dec 18, 2024
Dec 18, 2024
Dec 18, 2024
Jul 8, 2024
Jul 3, 2024
Jul 3, 2024
Jul 3, 2024
Jul 3, 2024
Jul 3, 2024
Jul 3, 2024
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Jul 3, 2024
Jul 3, 2024
Mar 22, 2024
Mar 22, 2024
Mar 15, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Mar 7, 2024
Jun 20, 2023
May 11, 2023
Decision to grant a European patent
Search/Exam
Mar 24, 2023
(Electronic) Receipt
Search/Exam
Mar 24, 2023
Filing of the translations of the claims
Search/Exam
Mar 24, 2023
French translation of claims
Search/Exam
Mar 24, 2023
German translation of the claims
Search/Exam
Mar 24, 2023
Letter accompanying subsequently filed items
Search/Exam
Mar 24, 2023
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Dec 9, 2022
Intention to grant (signatures)
Search/Exam
Dec 9, 2022
Text intended for grant (clean copy)
Search/Exam
Dec 9, 2022
Nov 9, 2022
(Electronic) Receipt
Search/Exam
Nov 9, 2022
Amended description with annotations
Search/Exam
Nov 9, 2022
Description
Search/Exam
Nov 9, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 9, 2022
Jul 4, 2022
Jul 4, 2022
Jul 4, 2022
Jul 4, 2022
Intention to grant (signatures)
Search/Exam
Jul 4, 2022
Text intended for grant (clean copy)
Search/Exam
Jul 4, 2022
May 10, 2021
(Electronic) Receipt
Search/Exam
May 10, 2021
Amended claims with annotations
Search/Exam
May 10, 2021
Amended description with annotations
Search/Exam
May 10, 2021
Claims
Search/Exam
May 10, 2021
Description
Search/Exam
May 10, 2021
Letter accompanying subsequently filed items
Search/Exam
May 10, 2021
Mar 18, 2021
Annex to the communication
Search/Exam
Mar 18, 2021
Communication from the Examining Division
Search/Exam
Mar 12, 2021
Examination started
Search/Exam
Feb 19, 2019
(Electronic) Receipt
Search/Exam
Feb 19, 2019
Feb 19, 2019
Amended claims with annotations
Search/Exam
Feb 19, 2019
Amendments received before examination
Search/Exam
Feb 19, 2019
Letter accompanying subsequently filed items
Search/Exam
Jan 22, 2019
Submission concerning representation
Search/Exam
Jan 21, 2019
Jan 17, 2019
Submission concerning representation
Search/Exam
Dec 19, 2018
Notification of forthcoming publication
Search/Exam
Feb 2, 2018
Feb 2, 2018
European search opinion
Search/Exam
Feb 2, 2018
European search report
Search/Exam
Feb 2, 2018
Information on Search Strategy
Search/Exam
Jan 24, 2018
Search started
Search/Exam
Sep 6, 2017
Communication to designated inventor
Search/Exam
Jul 14, 2017
Abstract
Search/Exam
Jul 14, 2017
Jul 14, 2017
Claims
Search/Exam
Jul 14, 2017
Description
Search/Exam
Jul 14, 2017
Designation of inventor
Search/Exam
Jul 14, 2017
Drawings
Search/Exam
Jul 14, 2017
Request for grant of a European patent
Search/Exam