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The patent EP3210978 was granted to Celanese Sales Germany on Sep 6, 2023. The application was filed on Jun 6, 2013 under application number EP17151405A. 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 |
|---|---|---|---|
| ANHUI JINHE INDUSTRIAL | Jun 6, 2024 | COHAUSZ & FLORACK | ADMISSIBLE |
| TER MEER STEINMEISTER & PARTNER PATENTANWALTE MBB | Jun 6, 2024 | TER MEER STEINMEISTER & PARTNER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
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.
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Description
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(Electronic) Receipt
Appeal
Nov 28, 2025
Notice of appeal
Appeal
Nov 28, 2025
Notice of appeal
Appeal
Nov 26, 2025
(Electronic) Receipt
Appeal
Nov 26, 2025
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Notice of appeal
Appeal
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OPPO
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Sep 19, 2023
Aug 10, 2023
Decision to grant a European patent
Search/Exam
Jul 26, 2023
(Electronic) Receipt
Search/Exam
Jul 26, 2023
Filing of the translations of the claims
Search/Exam
Jul 26, 2023
French translation of claims
Search/Exam
Jul 26, 2023
German translation of the claims
Search/Exam
Jul 26, 2023
Letter accompanying subsequently filed items
Search/Exam
Apr 6, 2023
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Intention to grant (signatures)
Search/Exam
Apr 6, 2023
Text intended for grant (clean copy)
Search/Exam
Apr 6, 2023
Feb 28, 2023
(Electronic) Receipt
Search/Exam
Feb 28, 2023
Amended description with annotations
Search/Exam
Feb 28, 2023
Description
Search/Exam
Feb 28, 2023
Letter accompanying subsequently filed items
Search/Exam
Feb 28, 2023
Dec 6, 2022
Annex to the communication
Search/Exam
Dec 6, 2022
Communication from the Examining Division
Search/Exam
Sep 13, 2022
(Electronic) Receipt
Search/Exam
Sep 13, 2022
Amended claims with annotations
Search/Exam
Sep 13, 2022
Claims
Search/Exam
Sep 13, 2022
Letter accompanying subsequently filed items
Search/Exam
Sep 13, 2022
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(Electronic) Receipt
Search/Exam
Jul 13, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 13, 2022
Mar 4, 2022
Annex to the communication
Search/Exam
Mar 4, 2022
Communication from the Examining Division
Search/Exam
Dec 17, 2021
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Nov 24, 2021
(Electronic) Receipt
Search/Exam
Nov 24, 2021
Letter accompanying subsequently filed items
Search/Exam
Nov 24, 2021
Non-patent literature filed by a third party
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Nov 24, 2021
Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Nov 24, 2021
Observations by third parties
Search/Exam
Jul 9, 2021
(Electronic) Receipt
Search/Exam
Jul 9, 2021
Amended claims with annotations
Search/Exam
Jul 9, 2021
Claims
Search/Exam
Jul 9, 2021
Letter accompanying subsequently filed items
Search/Exam
Jul 9, 2021
Jun 16, 2021
(Electronic) Receipt
Search/Exam
Jun 16, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 16, 2021
Matter concerning the application
Search/Exam
Feb 9, 2021
Jan 29, 2021
(Electronic) Receipt
Search/Exam
Jan 29, 2021
Letter accompanying subsequently filed items
Search/Exam
Jan 29, 2021
Sep 24, 2020
Annex to the communication
Search/Exam
Sep 24, 2020
Communication from the Examining Division
Search/Exam
Sep 17, 2020
Examination started
Search/Exam
Feb 26, 2018
(Electronic) Receipt
Search/Exam
Feb 26, 2018
Letter accompanying subsequently filed items
Search/Exam
Feb 26, 2018
Reply to Written Opinion prepared by the EPO
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Sep 4, 2017
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Notification of forthcoming publication
Search/Exam
Jun 21, 2017
Communication to designated inventor
Search/Exam
May 31, 2017
Refund of fees
Search/Exam
May 29, 2017
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European search opinion
Search/Exam
May 29, 2017
European search report
Search/Exam
May 29, 2017
Information on Search Strategy
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May 15, 2017
(Electronic) Receipt
Search/Exam
May 15, 2017
Letter concerning the inventor
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May 5, 2017
Search started
Search/Exam
Apr 19, 2017
(Electronic) Receipt
Search/Exam
Apr 19, 2017
Claims
Search/Exam
Apr 19, 2017
Letter accompanying subsequently filed items
Search/Exam
Apr 19, 2017
Matter concerning the application
Search/Exam
Apr 10, 2017
Mar 30, 2017
Letter which had not been notified
Search/Exam
Mar 27, 2017
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Mar 16, 2017
(Electronic) Receipt
Search/Exam
Mar 16, 2017
Letter accompanying subsequently filed items
Search/Exam
Mar 16, 2017
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
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Mar 8, 2017
Communication to designated inventor
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Mar 8, 2017
Communication to designated inventor
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Feb 9, 2017
Invitation to file claims
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Jan 13, 2017
Abstract
Search/Exam
Jan 13, 2017
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Description
Search/Exam
Jan 13, 2017
Designation of inventor
Search/Exam
Jan 13, 2017
Drawings
Search/Exam
Jan 13, 2017
Request for grant of a European patent
Search/Exam
Jan 2, 2014
Jan 2, 2014