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The patent EP3526285 was granted to Covestro on Jul 17, 2024. The application was filed on Oct 12, 2017 under application number EP17790719A. 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 |
|---|---|---|---|
| HENKEL | Apr 15, 2025 | - | ADMISSIBLE |
| WACKER CHEMIE | Apr 10, 2025 | MIESKES | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102011003425 |
| DESCRIPTION | WO2012022494 |
| INTERNATIONAL-SEARCH-REPORT | CN104130378 |
| INTERNATIONAL-SEARCH-REPORT | EP2644657 |
| OPPOSITION | CN104388040 |
| OPPOSITION | CN105176481 |
| OPPOSITION | DE102008054541 |
| OPPOSITION | EP0931800 |
| OPPOSITION | EP1396513 |
| OPPOSITION | EP1710280 |
| OPPOSITION | EP1967550 |
| OPPOSITION | EP2604655 |
| OPPOSITION | US2013281562 |
| OPPOSITION | US4950707 |
| OPPOSITION | US5792825 |
| OPPOSITION | US6294635 |
| OPPOSITION | WO0026271 |
| OPPOSITION | WO02068501 |
| OPPOSITION | WO03066701 |
| OPPOSITION | WO2006117338 |
| OPPOSITION | WO2007025668 |
| OPPOSITION | WO2009065950 |
| OPPOSITION | WO2011157562 |
| OPPOSITION | WO2012065716 |
| OPPOSITION | WO2015180968 |
| OPPOSITION | WO2016116415 |
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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Aug 21, 2024
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Decision to grant a European patent
Search/Exam
Jun 5, 2024
(Electronic) Receipt
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Jun 5, 2024
English translation of the claims
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Jun 5, 2024
Filing of the translations of the claims
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Jun 5, 2024
French translation of claims
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Jun 5, 2024
Letter accompanying subsequently filed items
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Feb 22, 2024
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Intention to grant (signatures)
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Feb 22, 2024
Text intended for grant (clean copy)
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Feb 22, 2024
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Dec 15, 2023
Annexes in respect of a client data request
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Dec 15, 2023
Annexes in respect of a client data request
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Annexes in respect of a client data request
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Dec 15, 2023
Annexes in respect of a client data request
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Dec 15, 2023
Annexes in respect of a client data request
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Dec 15, 2023
Letter accompanying subsequently filed items
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Dec 15, 2023
Nov 14, 2023
(Electronic) Receipt
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Nov 14, 2023
Amended description with annotations
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Nov 14, 2023
Description
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Nov 14, 2023
Letter accompanying subsequently filed items
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Nov 14, 2023
Jul 17, 2023
Annex to the communication
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Jul 17, 2023
Communication from the Examining Division
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Jul 11, 2023
Examination started
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Aug 12, 2020
Jun 19, 2020
Annexes in respect of a client data request
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Jun 19, 2020
Annexes in respect of a client data request
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Annexes in respect of a client data request
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Annexes in respect of a client data request
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Annexes in respect of a client data request
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Annexes in respect of a client data request
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Annexes in respect of a client data request
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Annexes in respect of a client data request
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Annexes in respect of a client data request
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Annexes in respect of a client data request
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Jun 19, 2020
Letter accompanying subsequently filed items
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Jun 19, 2020
Dec 9, 2019
(Electronic) Receipt
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Dec 9, 2019
Dec 9, 2019
Amended claims with annotations
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Dec 9, 2019
Dec 9, 2019
Amended description with annotations
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Dec 9, 2019
Amendments received before examination
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Dec 9, 2019
Letter accompanying subsequently filed items
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Jul 24, 2019
May 29, 2019
May 27, 2019
Communication to designated inventor
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May 27, 2019
Communication to designated inventor
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May 22, 2019
Priority search results copy provided by EPO
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May 9, 2019
Apr 5, 2019
(Electronic) Receipt
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Apr 5, 2019
Request for entry into the European phase
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Mar 1, 2019
Information on entry into European phase
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May 16, 2018
Apr 26, 2018
Copy of the international search report
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Apr 26, 2018
Copy of the international search report
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Apr 26, 2018
Published international application - A1
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Nov 23, 2017
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Oct 12, 2017
(Electronic) Receipt
PCTRO
Oct 12, 2017
Abstract
PCTRO
Oct 12, 2017
Claims
PCTRO
Oct 12, 2017
Description
PCTRO
Oct 12, 2017
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