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The patent EP3568422 was granted to DDP Specialty Electronic Materials on Sep 25, 2024. The application was filed on Dec 21, 2017 under application number EP17832645A. 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 |
|---|---|---|---|
| SIKA TECHNOLOGY | Jun 24, 2025 | SIKA PATENT ATTORNEYS | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | WO2009144280 |
| INTERNATIONAL-SEARCH-REPORT | US2008185098 |
| INTERNATIONAL-SEARCH-REPORT | US2016046848 |
| INTERNATIONAL-SEARCH-REPORT | US2016137815 |
| OPPOSITION | US2008289761 |
| OPPOSITION | US2016046848 |
| OTHER | WO2009144280 |
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 22, 2025
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Dec 18, 2024
(Electronic) Receipt
Search/Exam
Dec 18, 2024
Authorisation
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Dec 18, 2024
Letter accompanying subsequently filed items
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Dec 18, 2024
Oct 9, 2024
Sep 23, 2024
Invitation to file an authorisation
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Sep 19, 2024
(Electronic) Receipt
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Sep 19, 2024
Letter accompanying subsequently filed items
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Sep 19, 2024
Aug 29, 2024
Decision to grant a European patent
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Aug 14, 2024
(Electronic) Receipt
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Aug 14, 2024
Filing of the translations of the claims
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Aug 14, 2024
French translation of claims
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Aug 14, 2024
German translation of the claims
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Aug 14, 2024
Letter accompanying subsequently filed items
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Aug 12, 2024
Aug 7, 2024
(Electronic) Receipt
Search/Exam
Aug 7, 2024
Annexes in respect of a client data request
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Aug 7, 2024
Aug 6, 2024
Jul 31, 2024
(Electronic) Receipt
Search/Exam
Jul 31, 2024
Annexes in respect of a client data request
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Jul 31, 2024
Annexes in respect of a client data request
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Jul 31, 2024
Annexes in respect of a client data request
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Jul 31, 2024
Annexes in respect of a client data request
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Jul 31, 2024
Letter accompanying subsequently filed items
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Jul 31, 2024
May 7, 2024
May 7, 2024
May 7, 2024
May 7, 2024
Intention to grant (signatures)
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May 7, 2024
Text intended for grant (clean copy)
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May 7, 2024
Oct 17, 2023
(Electronic) Receipt
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Oct 17, 2023
Amended claims with annotations
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Oct 17, 2023
Amended description with annotations
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Oct 17, 2023
Claims
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Oct 17, 2023
Description
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Oct 17, 2023
Letter accompanying subsequently filed items
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Oct 17, 2023
Sep 27, 2023
Annex to the communication
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Sep 27, 2023
Communication from the Examining Division
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May 22, 2023
(Electronic) Receipt
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May 22, 2023
Amended claims with annotations
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May 22, 2023
Claims
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May 22, 2023
Letter accompanying subsequently filed items
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May 22, 2023
Apr 17, 2023
Annex to the communication
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Apr 17, 2023
Communication from the Examining Division
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May 17, 2022
(Electronic) Receipt
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May 17, 2022
Amended claims with annotations
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May 17, 2022
Amended description with annotations
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May 17, 2022
Claims
Search/Exam
May 17, 2022
Description
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May 17, 2022
Letter accompanying subsequently filed items
Search/Exam
May 17, 2022
Mar 25, 2022
Mar 22, 2022
(Electronic) Receipt
Search/Exam
Mar 22, 2022
Letter accompanying subsequently filed items
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Mar 22, 2022
Dec 9, 2021
Annex to the communication
Search/Exam
Dec 9, 2021
Communication from the Examining Division
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Jun 30, 2021
(Electronic) Receipt
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Jun 30, 2021
Amended claims with annotations
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Jun 30, 2021
Claims
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Jun 30, 2021
Letter accompanying subsequently filed items
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Jun 30, 2021
Mar 10, 2021
Annex to the communication
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Mar 10, 2021
Communication from the Examining Division
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Mar 10, 2021
Mar 4, 2021
Non-patent literature filed by a third party
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Mar 4, 2021
Observations by third parties
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Mar 3, 2021
Examination started
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Feb 18, 2020
(Electronic) Receipt
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Feb 18, 2020
Feb 18, 2020
Amended description with annotations
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Feb 18, 2020
Amendments received before examination
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Feb 18, 2020
Letter accompanying subsequently filed items
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Oct 23, 2019
Aug 21, 2019
Aug 19, 2019
Communication to designated inventor
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Aug 19, 2019
Communication to designated inventor
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Aug 19, 2019
Communication to designated inventor
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Jul 30, 2019
Jul 10, 2019
Jul 10, 2019
Jul 4, 2019
Jul 3, 2019
(Electronic) Receipt
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Jul 3, 2019
Jul 3, 2019
Amended claims with annotations
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Jul 3, 2019
Request for entry into the European phase
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May 24, 2019
Information on entry into European phase
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Aug 13, 2018
Jul 19, 2018
Copy of the international search report
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Jul 19, 2018
Published international application - A1
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Mar 14, 2018
ISR: cited documents
PCTISA
Mar 13, 2018
Mar 13, 2018
Mar 13, 2018
Feb 5, 2018
Jan 15, 2018
Abstract
PCTISA
Jan 15, 2018
Annex
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Jan 15, 2018
Claims
PCTISA
Jan 15, 2018
Description
PCTISA
Jan 15, 2018
Jan 15, 2018
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