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The patent EP3369722 was granted to Daicel on Oct 5, 2022. The application was filed on May 25, 2017 under application number EP17732015A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| CELANESE | Oct 1, 2020 | BIRD & BIRD | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2008293966 |
| DESCRIPTION | US2008293967 |
| INTERNATIONAL-SEARCH-REPORT | JP2006182691 |
| INTERNATIONAL-SEARCH-REPORT | JP2014520107 |
| INTERNATIONAL-SEARCH-REPORT | US2008293966 |
| INTERNATIONAL-SEARCH-REPORT | US2008293967 |
| INTERNATIONAL-SEARCH-REPORT | WO2014097867 |
| INTERNATIONAL-SEARCH-REPORT | WO2014115826 |
| INTERNATIONAL-SEARCH-REPORT | WO2016194850 |
| INTERNATIONAL-SEARCH-REPORT | WO2017057085 |
| OPPOSITION | EP2657220 |
| OPPOSITION | EP3369722 |
| OPPOSITION | GB844598 |
| OPPOSITION | JP2017006647 |
| OPPOSITION | US2008293967 |
| OPPOSITION | US2015368176 |
| OPPOSITION | US4061546 |
| OPPOSITION | US4380663 |
| OPPOSITION | US4433166 |
| OPPOSITION | US5916422 |
| OPPOSITION | US5917089 |
| OPPOSITION | US7619113 |
| OPPOSITION | US7683212 |
| OPPOSITION | US8017802 |
| OPPOSITION | US8168822 |
| OPPOSITION | WO2013119275 |
| OPPOSITION | WO2016076972 |
| OPPOSITION | WO2018135016 |
| SEARCH | EP2937329 |
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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OPPO
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Description
OPPO
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Jan 13, 2020
Dec 5, 2019
Decision to grant a European patent
Search/Exam
Nov 22, 2019
(Electronic) Receipt
Search/Exam
Nov 22, 2019
Filing of the translations of the claims
Search/Exam
Nov 22, 2019
French translation of claims
Search/Exam
Nov 22, 2019
German translation of the claims
Search/Exam
Oct 14, 2019
Oct 1, 2019
(Electronic) Receipt
Search/Exam
Oct 1, 2019
Letter accompanying subsequently filed items
Search/Exam
Oct 1, 2019
Matter concerning the application
Search/Exam
Aug 6, 2019
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Intention to grant (signatures)
Search/Exam
Jul 29, 2019
Text intended for grant (clean copy)
Search/Exam
Jul 29, 2019
May 20, 2019
Amended description with annotations
Search/Exam
May 20, 2019
Claims
Search/Exam
May 20, 2019
Description
Search/Exam
May 20, 2019
Jan 28, 2019
Annex to the communication
Search/Exam
Jan 28, 2019
Communication from the Examining Division
Search/Exam
Jan 22, 2019
Examination started
Search/Exam
Oct 8, 2018
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Amended claims with annotations
Search/Exam
Oct 8, 2018
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Amendments received before examination
Search/Exam
Aug 8, 2018
Notification of forthcoming publication
Search/Exam
Jul 26, 2018
Copy of the international search report
Search/Exam
Jul 26, 2018
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International publication pamphlet
Search/Exam
Jul 26, 2018
Mar 29, 2018
Mar 12, 2018
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European search opinion
Search/Exam
Mar 12, 2018
Information on Search Strategy
Search/Exam
Mar 12, 2018
Supplementary European search report
Search/Exam
Dec 18, 2017
Search started
Search/Exam
Dec 6, 2017
Communication to designated inventor
Search/Exam
Nov 29, 2017
Refund order search fee
Search/Exam
Nov 21, 2017
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Oct 25, 2017
Oct 17, 2017
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Oct 5, 2017
Sep 22, 2017
Enquiry with the International Bureau
Search/Exam
Jul 3, 2017
(Electronic) Receipt
Search/Exam
Jul 3, 2017
Abstract
Search/Exam
Jul 3, 2017
Annex
Search/Exam
Jul 3, 2017
Claims
Search/Exam
Jul 3, 2017
Description
Search/Exam
Jul 3, 2017
Drawings
Search/Exam
Jul 3, 2017
Request for entry into the European phase
Search/Exam