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The patent EP3427928 was granted to Kiefel on Sep 15, 2021. The application was filed on Sep 27, 2013 under application number EP18000664A. 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 |
|---|---|---|---|
| PLUMAT MASCHINENBAU VERTRIEBS | Jun 15, 2022 | SONNENBERG HARRISON PARTNERSCHAFT MBB | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102010050136 |
| DESCRIPTION | EP1780000 |
| DESCRIPTION | US4489873 |
| DESCRIPTION | WO2006042710 |
| DESCRIPTION | WO2012006980 |
| OPPOSITION | DE69216991T |
| OPPOSITION | DE69501721T |
| OPPOSITION | DE69504472T |
| OPPOSITION | EP1607212 |
| OPPOSITION | EP1818159 |
| OPPOSITION | JPS63126726 |
| OPPOSITION | US4489873 |
| OPPOSITION | WO2006042710 |
| SEARCH | US4489873 |
| SEARCH | WO2006042710 |
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.
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Aug 19, 2021
Decision to grant a European patent
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Aug 18, 2021
Refund of fees
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Aug 18, 2021
Refund of fees
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Jul 22, 2021
(Electronic) Receipt
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Jul 22, 2021
English translation of the claims
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Jul 22, 2021
Filing of the translations of the claims
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Jul 22, 2021
French translation of claims
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Jul 22, 2021
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Jun 2, 2021
Text intended for grant (clean copy)
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Jun 2, 2021
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(Electronic) Receipt
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Jan 14, 2021
Amended claims with annotations
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Amended description with annotations
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Jan 14, 2021
Claims
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Jan 14, 2021
Description
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Jan 14, 2021
Letter accompanying subsequently filed items
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Jan 14, 2021
Nov 18, 2020
Annex to the communication
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Nov 18, 2020
Communication from the Examining Division
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Jun 18, 2020
(Electronic) Receipt
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Jun 18, 2020
Amended claims with annotations
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Jun 18, 2020
Amended description with annotations
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Jun 18, 2020
Claims
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Jun 18, 2020
Letter accompanying subsequently filed items
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Annex to the communication
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Mar 10, 2020
Communication from the Examining Division
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Mar 3, 2020
Examination started
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Amended claims with annotations
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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
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Dec 5, 2018
European search report
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Dec 5, 2018
Information on Search Strategy
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Nov 23, 2018
Search started
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Oct 31, 2018
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Oct 1, 2018
Designation of inventor
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Oct 1, 2018
Letter concerning the inventor
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Sep 27, 2018
Designation of inventor
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Sep 27, 2018
Letter concerning the inventor
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Sep 19, 2018
Deficiency in designation of inventor
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Abstract
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Abstract
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Description
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Matter concerning the application
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Aug 24, 2018
Request for grant of a European patent
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Aug 9, 2018
Abstract
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Abstract
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Amended claims with annotations
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Aug 9, 2018
Claims
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Aug 9, 2018
Description
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Drawings
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Matter concerning the application
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Aug 9, 2018
Request for grant of a European patent
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Feb 9, 2016
Priority search results copy provided by EPO
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Jun 3, 2014
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