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The patent EP3664981 was granted to Sika Technology on Apr 5, 2023. The application was filed on Aug 9, 2018 under application number EP18749395A. 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 |
|---|---|---|---|
| AWA SWITZERLAND | Jan 5, 2024 | AWA SWITZERLAND | ADMISSIBLE |
| HEHN | Jan 5, 2024 | HEHN | ADMISSIBLE |
| HOLCIM TECHNOLOGY | Jan 5, 2024 | WSL 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 | WO2013064826 |
| INTERNATIONAL-SEARCH-REPORT | CN204354263U |
| INTERNATIONAL-SEARCH-REPORT | EP1529617 |
| INTERNATIONAL-SEARCH-REPORT | KR20150138608 |
| INTERNATIONAL-SEARCH-REPORT | KR20160068564 |
| INTERNATIONAL-SEARCH-REPORT | US2016107396 |
| OPPOSITION | CN105216333 |
| OPPOSITION | CN105500494 |
| OPPOSITION | CN105599104 |
| OPPOSITION | CN105666640 |
| OPPOSITION | CN106088610 |
| OPPOSITION | CN106907006 |
| OPPOSITION | CN106914988 |
| OPPOSITION | CN106988535 |
| OPPOSITION | CN204019730U |
| OPPOSITION | CN204354263U |
| OPPOSITION | CN205685756U |
| OPPOSITION | CN205766713U |
| OPPOSITION | DE2947913 |
| OPPOSITION | DE3546501 |
| OPPOSITION | DE4203571 |
| OPPOSITION | DE9211567U |
| OPPOSITION | EP0120812 |
| OPPOSITION | EP0300342 |
| OPPOSITION | EP1529617 |
| OPPOSITION | FR2671754 |
| OPPOSITION | GB1599856 |
| OPPOSITION | JPS60155938 |
| OPPOSITION | JPS60155938U |
| OPPOSITION | US2016107396 |
| OPPOSITION | US3843100 |
| OPPOSITION | US5645375 |
| OPPOSITION | US7524386 |
| OPPOSITION | US8517594 |
| OPPOSITION | WO2013064826 |
| OPPOSITION | WO2017005803 |
| OPPOSITION | WO2017222599 |
| OPPOSITION | WO9002610 |
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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Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Dec 10, 2025
Refund of fees
Appeal
Dec 8, 2025
Dec 8, 2025
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Dec 5, 2025
(Electronic) Receipt
Appeal
Dec 5, 2025
Notice of appeal
Appeal
Dec 5, 2025
Dec 3, 2025
(Electronic) Receipt
Appeal
Dec 3, 2025
Dec 3, 2025
Withdrawal of an appeal
Appeal
Oct 9, 2025
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(Electronic) Receipt
Appeal
Oct 6, 2025
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Notice of appeal
Appeal
Oct 3, 2025
(Electronic) Receipt
Appeal
Oct 3, 2025
Notice of appeal
Appeal
Oct 3, 2025
Notice of appeal
Appeal
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Authorisation
OPPO
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Annex
OPPO
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Apr 18, 2023
Mar 10, 2023
Decision to grant a European patent
Search/Exam
Feb 22, 2023
(Electronic) Receipt
Search/Exam
Feb 22, 2023
English translation of the claims
Search/Exam
Feb 22, 2023
Filing of the translations of the claims
Search/Exam
Feb 22, 2023
French translation of claims
Search/Exam
Feb 22, 2023
Letter accompanying subsequently filed items
Search/Exam
Nov 9, 2022
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Intention to grant (signatures)
Search/Exam
Nov 9, 2022
Text intended for grant (clean copy)
Search/Exam
Nov 9, 2022
May 20, 2022
(Electronic) Receipt
Search/Exam
May 20, 2022
Amended claims with annotations
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May 20, 2022
Claims
Search/Exam
May 20, 2022
Letter accompanying subsequently filed items
Search/Exam
May 20, 2022
Jan 27, 2022
Annex to the communication
Search/Exam
Jan 27, 2022
Communication from the Examining Division
Search/Exam
Jan 20, 2022
Examination started
Search/Exam
Aug 19, 2020
(Electronic) Receipt
Search/Exam
Aug 19, 2020
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Amended claims with annotations
Search/Exam
Aug 19, 2020
Amended description with annotations
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Aug 19, 2020
Amendments received before examination
Search/Exam
Aug 19, 2020
Letter accompanying subsequently filed items
Search/Exam
May 20, 2020
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(Electronic) Receipt
Search/Exam
May 13, 2020
Letter accompanying subsequently filed items
Search/Exam
May 13, 2020
Letter concerning the inventor
Search/Exam
Apr 16, 2020
Apr 7, 2020
Letter which had not been notified
Search/Exam
Mar 18, 2020
Mar 16, 2020
Communication to designated inventor
Search/Exam
Mar 16, 2020
Communication to designated inventor
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Mar 16, 2020
Communication to designated inventor
Search/Exam
Mar 16, 2020
Communication to designated inventor
Search/Exam
Mar 11, 2020
Priority search results copy provided by EPO
Search/Exam
Mar 5, 2020
(Electronic) Receipt
Search/Exam
Mar 5, 2020
Request for entry into the European phase
Search/Exam
Feb 26, 2020
Dec 20, 2019
Information on entry into European phase
Search/Exam
Mar 5, 2019
Feb 14, 2019
Copy of the international search report
Search/Exam
Feb 14, 2019
Copy of the international search report
Search/Exam
Feb 14, 2019
Published international application - A1
Search/Exam
Oct 9, 2018
Oct 9, 2018
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Aug 17, 2018
Aug 9, 2018
(Electronic) Receipt
PCTRO
Aug 9, 2018
Abstract
PCTRO
Aug 9, 2018
Claims
PCTRO
Aug 9, 2018
Description
PCTRO
Aug 9, 2018
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Drawings
PCTRO
Aug 9, 2018
Aug 9, 2018