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The patent EP4085794 was granted to Zahoransky on Oct 22, 2025. The application was filed on May 7, 2021 under application number EP21172699A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| MC SCHIFFER | Jan 9, 2024 | GRUNECKER PATENT | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE10123329 |
| OPPOSITION | DE102009005708 |
| OPPOSITION | DE102018214307 |
| OPPOSITION | DE8414080U |
| OPPOSITION | EP0189067 |
| OPPOSITION | US2020005069 |
| OPPOSITION | US6092059 |
| SEARCH | DE8414080U |
| SEARCH | EP2210521 |
| SEARCH | EP3150082 |
| SEARCH | WO0010425 |
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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OPPO
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Authorisation
OPPO
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Apr 25, 2023
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Decision to grant a European patent
Search/Exam
Mar 2, 2023
(Electronic) Receipt
Search/Exam
Mar 2, 2023
Letter accompanying subsequently filed items
Search/Exam
Mar 2, 2023
Matter concerning the application
Search/Exam
Feb 28, 2023
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(Electronic) Receipt
Search/Exam
Feb 20, 2023
English translation of the claims
Search/Exam
Feb 20, 2023
Filing of the translations of the claims
Search/Exam
Feb 20, 2023
French translation of claims
Search/Exam
Feb 20, 2023
Letter accompanying subsequently filed items
Search/Exam
Jan 4, 2023
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Intention to grant (signatures)
Search/Exam
Jan 4, 2023
Text intended for grant (clean copy)
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Jan 4, 2023
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Oct 12, 2022
Notification of forthcoming publication
Search/Exam
Jul 11, 2022
Annex to the communication
Search/Exam
Jul 11, 2022
Consultation by telephone/in person
Search/Exam
Jul 11, 2022
May 24, 2022
(Electronic) Receipt
Search/Exam
May 24, 2022
Amended claims with annotations
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May 24, 2022
Amended description with annotations
Search/Exam
May 24, 2022
Claims
Search/Exam
May 24, 2022
Description
Search/Exam
May 24, 2022
Letter accompanying subsequently filed items
Search/Exam
May 24, 2022
Apr 12, 2022
Annex to the communication
Search/Exam
Apr 12, 2022
Communication from the Examining Division
Search/Exam
Apr 7, 2022
Examination started
Search/Exam
Feb 3, 2022
(Electronic) Receipt
Search/Exam
Feb 3, 2022
Feb 3, 2022
Amended claims with annotations
Search/Exam
Feb 3, 2022
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Amended description with annotations
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Feb 3, 2022
Amendments received before examination
Search/Exam
Feb 3, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 18, 2021
Nov 15, 2021
Oct 20, 2021
Oct 20, 2021
European search opinion
Search/Exam
Oct 20, 2021
European search report
Search/Exam
Oct 20, 2021
Information on Search Strategy
Search/Exam
Oct 12, 2021
Search started
Search/Exam
May 7, 2021
Abstract
Search/Exam
May 7, 2021
May 7, 2021
Authorisation
Search/Exam
May 7, 2021
Claims
Search/Exam
May 7, 2021
Description
Search/Exam
May 7, 2021
Designation of inventor
Search/Exam
May 7, 2021
Drawings
Search/Exam
May 7, 2021
Request for grant of a European patent
Search/Exam