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The patent EP3805181 was granted to Sika Technology on Oct 1, 2025. The application was filed on Mar 30, 2015 under application number EP20206301A. 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 |
|---|---|---|---|
| ARDEX GROUP | Jul 19, 2023 | BALS & VOGEL PATENTANWALTE PARTGMBB | ADMISSIBLE |
| PATENTANWALTE OLBRICHT BUCHHOLD KEULERTZ | Jul 18, 2023 | PATENTANWALTE OLBRICHT BUCHHOLD KEULERTZ | ADMISSIBLE |
| SAINT GOBAIN | Jul 18, 2023 | SAINT GOBAIN RECHERCHE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE10159339 |
| DESCRIPTION | DE19754826 |
| DESCRIPTION | DE20121423U |
| DESCRIPTION | DE3218446 |
| DESCRIPTION | DE60304041T |
| DESCRIPTION | EP0379477 |
| DESCRIPTION | WO9635649 |
| OPPOSITION | DE10159339 |
| OPPOSITION | DE19754826 |
| OPPOSITION | DE20121423U |
| OPPOSITION | DE2311239 |
| OPPOSITION | DE3218446 |
| OPPOSITION | DE60304041T |
| OPPOSITION | EP0379477 |
| OPPOSITION | EP1785405 |
| OPPOSITION | JP2005298221 |
| OPPOSITION | JP2007238369 |
| OPPOSITION | JPS5849651 |
| OPPOSITION | JPS5879071 |
| OPPOSITION | KR20090121657 |
| OPPOSITION | US2006118006 |
| OPPOSITION | US3600203 |
| OPPOSITION | WO2012143221 |
| OPPOSITION | WO2014108436 |
| OPPOSITION | WO9635649 |
| SEARCH | DE19754826 |
| SEARCH | DE20121423U |
| SEARCH | DE3218446 |
| SEARCH | DE60304041T |
| SEARCH | WO9635649 |
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 4, 2025
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Refund of fees
OPPO
May 20, 2025
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(Electronic) Receipt
Appeal
May 14, 2025
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Withdrawal of an appeal
Appeal
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(Electronic) Receipt
Appeal
Apr 9, 2025
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Notice of appeal
Appeal
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Nov 2, 2022
Sep 22, 2022
Decision to grant a European patent
Search/Exam
Sep 12, 2022
(Electronic) Receipt
Search/Exam
Sep 12, 2022
English translation of the claims
Search/Exam
Sep 12, 2022
Filing of the translations of the claims
Search/Exam
Sep 12, 2022
French translation of claims
Search/Exam
Sep 12, 2022
Letter accompanying subsequently filed items
Search/Exam
May 17, 2022
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Intention to grant (signatures)
Search/Exam
May 17, 2022
Text intended for grant (clean copy)
Search/Exam
May 17, 2022
Mar 1, 2022
(Electronic) Receipt
Search/Exam
Mar 1, 2022
Amended claims with annotations
Search/Exam
Mar 1, 2022
Claims
Search/Exam
Mar 1, 2022
Letter accompanying subsequently filed items
Search/Exam
Mar 1, 2022
Nov 30, 2021
Annex to the communication
Search/Exam
Nov 30, 2021
Communication from the Examining Division
Search/Exam
Nov 19, 2021
Examination started
Search/Exam
Oct 4, 2021
(Electronic) Receipt
Search/Exam
Oct 4, 2021
Oct 4, 2021
Amended claims with annotations
Search/Exam
Oct 4, 2021
Amendments received before examination
Search/Exam
Oct 4, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 19, 2021
Mar 17, 2021
Notification of forthcoming publication
Search/Exam
Feb 19, 2021
Refund of fees
Search/Exam
Feb 18, 2021
Feb 18, 2021
European search opinion
Search/Exam
Feb 18, 2021
European search report
Search/Exam
Feb 18, 2021
Information on Search Strategy
Search/Exam
Feb 5, 2021
Note on telephone consultation
Search/Exam
Feb 4, 2021
(Electronic) Receipt
Search/Exam
Feb 4, 2021
Matter concerning the application
Search/Exam
Jan 29, 2021
Communication to designated inventor
Search/Exam
Jan 29, 2021
Communication to designated inventor
Search/Exam
Jan 29, 2021
Communication to designated inventor
Search/Exam
Jan 29, 2021
Communication to designated inventor
Search/Exam
Dec 9, 2020
Priority search results copy provided by EPO
Search/Exam
Nov 6, 2020
Abstract
Search/Exam
Nov 6, 2020
Nov 6, 2020
Claims
Search/Exam
Nov 6, 2020
Description
Search/Exam
Nov 6, 2020
Designation of inventor
Search/Exam
Nov 6, 2020
Drawings
Search/Exam
Nov 6, 2020
Request for grant of a European patent
Search/Exam
Nov 4, 2016
Priority search results copy provided by EPO
Search/Exam
Oct 28, 2015