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The patent EP3168044 was granted to Kureha on May 18, 2022. The application was filed on Apr 28, 2014 under application number EP16201783A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| ISARPATENT PATENT UND RECHTSANWALTE BARTH HASSA PECKMANN UND PARTNER MBB | Feb 20, 2023 | ISARPATENT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP4255215B |
| DESCRIPTION | JP4848020B |
| DESCRIPTION | JPH1034800 |
| EXAMINATION | EP1190847 |
| OPPOSITION | EP0358038 |
| OPPOSITION | EP1176002 |
| OPPOSITION | EP1985444 |
| OPPOSITION | JP2005119282 |
| OPPOSITION | JPH06924 |
| OPPOSITION | JPH081878 |
| OPPOSITION | WO9955528 |
| SEARCH | EP0756931 |
| SEARCH | EP2116371 |
| SEARCH | JP2010234718 |
| SEARCH | WO9955528 |
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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Means of redress
OPPO
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Authorisation
OPPO
May 8, 2023
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Apr 4, 2023
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Jun 1, 2022
Apr 26, 2022
Decision to grant a European patent
Search/Exam
Apr 6, 2022
(Electronic) Receipt
Search/Exam
Apr 6, 2022
French translation of claims
Search/Exam
Apr 6, 2022
German translation of the claims
Search/Exam
Apr 6, 2022
Letter accompanying subsequently filed items
Search/Exam
Feb 16, 2022
Feb 16, 2022
Feb 3, 2022
(Electronic) Receipt
Search/Exam
Feb 3, 2022
Letter accompanying subsequently filed items
Search/Exam
Feb 3, 2022
Dec 6, 2021
Dec 6, 2021
Dec 6, 2021
Intention to grant (signatures)
Search/Exam
Dec 6, 2021
Text intended for grant (clean copy)
Search/Exam
Dec 6, 2021
Apr 27, 2021
(Electronic) Receipt
Search/Exam
Apr 27, 2021
Amended description with annotations
Search/Exam
Apr 27, 2021
Description
Search/Exam
Apr 27, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 27, 2021
Mar 4, 2021
Annex to the communication
Search/Exam
Mar 4, 2021
Communication from the Examining Division
Search/Exam
Nov 11, 2020
(Electronic) Receipt
Search/Exam
Nov 11, 2020
Amended claims with annotations
Search/Exam
Nov 11, 2020
Claims
Search/Exam
Nov 11, 2020
Letter accompanying subsequently filed items
Search/Exam
Nov 11, 2020
Sep 2, 2020
Annex to the communication
Search/Exam
Sep 2, 2020
Communication from the Examining Division
Search/Exam
Aug 26, 2020
Examination started
Search/Exam
Oct 11, 2017
(Electronic) Receipt
Search/Exam
Oct 11, 2017
Oct 11, 2017
Amended claims with annotations
Search/Exam
Oct 11, 2017
Amendments received before examination
Search/Exam
Oct 11, 2017
Letter accompanying subsequently filed items
Search/Exam
Oct 11, 2017
Maintenance of the application
Search/Exam
May 22, 2017
Apr 20, 2017
Notification of forthcoming publication
Search/Exam
Mar 22, 2017
Refund of fees
Search/Exam
Mar 14, 2017
Mar 14, 2017
European search opinion
Search/Exam
Mar 14, 2017
European search report
Search/Exam
Mar 14, 2017
Information on Search Strategy
Search/Exam
Feb 27, 2017
Search started
Search/Exam
Jan 24, 2017
Communication to designated inventor
Search/Exam
Jan 24, 2017
Communication to designated inventor
Search/Exam
Jan 24, 2017
Communication to designated inventor
Search/Exam
Dec 1, 2016
Abstract
Search/Exam
Dec 1, 2016
Dec 1, 2016
Claims
Search/Exam
Dec 1, 2016
Description
Search/Exam
Dec 1, 2016
Designation of inventor
Search/Exam
Dec 1, 2016
Drawings
Search/Exam
Dec 1, 2016
Request for grant of a European patent
Search/Exam
Nov 25, 2014