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The patent EP3512379 was granted to Covestro Deutschland on Oct 21, 2020. The application was originally filed on Sep 8, 2017 under application number EP17761542A. The patent is currently recorded with a legal status of "Opposition Rejected".

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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102015100816 |
| DESCRIPTION | WO2012028747 |
| INTERNATIONAL-SEARCH-REPORT | DE102010040261 |
| INTERNATIONAL-SEARCH-REPORT | DE102015100816 |
| INTERNATIONAL-SEARCH-REPORT | US2010119792 |
| INTERNATIONAL-SEARCH-REPORT | WO2015120429 |
| OPPOSITION | DE102010040261 |
| OPPOSITION | DE102015100816 |
| OPPOSITION | DE2901774 |
| OPPOSITION | EP0192946 |
| OPPOSITION | EP3155917 |
| OPPOSITION | EP3305500 |
| OPPOSITION | US2010119792 |
| OPPOSITION | WO2014209308 |
| OPPOSITION | WO2015109359 |
| OPPOSITION | WO2015120429 |
| OPPOSITION | WO2015197515 |
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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Jul 22, 2025
Refund of fees
Appeal
Jul 10, 2025
Jul 10, 2025
Jul 10, 2025
Jul 2, 2025
Jun 28, 2025
Jun 20, 2025
Jun 13, 2025
(Electronic) Receipt
Appeal
Jun 13, 2025
Jun 13, 2025
Withdrawal of an appeal
Appeal
Apr 28, 2025
Apr 23, 2025
(Electronic) Receipt
Appeal
Apr 23, 2025
Apr 23, 2025
Feb 11, 2025
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Oct 15, 2024
Oct 11, 2024
(Electronic) Receipt
Appeal
Oct 11, 2024
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(Electronic) Receipt
Appeal
Jul 17, 2024
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(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
Dec 8, 2023
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Nov 24, 2023
(Electronic) Receipt
Search/Exam
Nov 24, 2023
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Letter accompanying subsequently filed items
Search/Exam
Nov 24, 2023
Letter concerning fees and payments
Search/Exam
Nov 24, 2023
Nov 21, 2023
Nov 20, 2023
(Electronic) Receipt
Appeal
Nov 20, 2023
Nov 20, 2023
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Oct 26, 2023
Annexes in respect of a client data request
Search/Exam
Oct 26, 2023
Annexes in respect of a client data request
Search/Exam
Oct 26, 2023
Annexes in respect of a client data request
Search/Exam
Oct 26, 2023
Letter accompanying subsequently filed items
Search/Exam
Oct 26, 2023
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Sep 29, 2023
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Sep 18, 2023
(Electronic) Receipt
Appeal
Sep 18, 2023
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Notice of appeal
Appeal
Jul 24, 2023
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Means of redress
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Nov 2, 2020
Sep 24, 2020
Decision to grant a European patent
Search/Exam
Aug 27, 2020
Aug 18, 2020
(Electronic) Receipt
Search/Exam
Aug 18, 2020
Filing of the translations of the claims
Search/Exam
Aug 18, 2020
French translation of claims
Search/Exam
Aug 18, 2020
German translation of the claims
Search/Exam
Aug 18, 2020
Letter accompanying subsequently filed items
Search/Exam
May 28, 2020
May 28, 2020
May 28, 2020
Intention to grant (signatures)
Search/Exam
May 28, 2020
Text intended for grant (clean copy)
Search/Exam
May 28, 2020
May 4, 2020
(Electronic) Receipt
Search/Exam
May 4, 2020
Amended claims with annotations
Search/Exam
May 4, 2020
Claims
Search/Exam
May 4, 2020
Letter accompanying subsequently filed items
Search/Exam
May 4, 2020
Apr 24, 2020
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Intention to grant (signatures)
Search/Exam
Apr 24, 2020
Text intended for grant (clean copy)
Search/Exam
Apr 24, 2020
Mar 30, 2020
Examination started
Search/Exam
Nov 6, 2019
(Electronic) Receipt
Search/Exam
Nov 6, 2019
Letter accompanying subsequently filed items
Search/Exam
Nov 6, 2019
Reply to Written Opinion prepared by the EPO
Search/Exam
Jun 26, 2019
Apr 29, 2019
Apr 25, 2019
Communication to designated inventor
Search/Exam
Apr 25, 2019
Communication to designated inventor
Search/Exam
Apr 25, 2019
Communication to designated inventor
Search/Exam
Apr 25, 2019
Communication to designated inventor
Search/Exam
Apr 25, 2019
Communication to designated inventor
Search/Exam
Apr 25, 2019
Communication to designated inventor
Search/Exam
Apr 25, 2019
Communication to designated inventor
Search/Exam
Apr 25, 2019
Communication to designated inventor
Search/Exam
Apr 18, 2019
Priority search results copy provided by EPO
Search/Exam
Apr 2, 2019
Mar 4, 2019
Mar 4, 2019
Mar 4, 2019
Notification of the recording of a change
Search/Exam
Feb 14, 2019
(Electronic) Receipt
Search/Exam
Feb 14, 2019
Request for entry into the European phase
Search/Exam
Jan 25, 2019
Information on entry into European phase
Search/Exam
Apr 9, 2018
Mar 22, 2018
Copy of the international search report
Search/Exam
Mar 22, 2018
Published international application - A1
Search/Exam
Nov 22, 2017
ISR: cited documents
PCTISA
Nov 21, 2017
Nov 21, 2017
Nov 21, 2017
Sep 18, 2017
Sep 14, 2017
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Sep 8, 2017
(Electronic) Receipt
PCTRO
Sep 8, 2017
Abstract
PCTRO
Sep 8, 2017
Claims
PCTRO
Sep 8, 2017
Description
PCTRO
Sep 8, 2017
Sep 8, 2017
Drawings
PCTRO
Sep 8, 2017
Sep 8, 2017