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The patent EP2433985 was granted to Hexion Research Belgium on Apr 1, 2020. The application was originally filed on Jun 21, 2011 under application number EP11005046A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US3377406 |
| DESCRIPTION | US3477990 |
| DESCRIPTION | US4734468 |
| OPPOSITION | DE19856397 |
| OPPOSITION | EP0155078 |
| OPPOSITION | US5688905 |
| OPPOSITION | WO2010010045 |
| OPPOSITION | WO2010010047 |
| OPPOSITION | WO2010010048 |
| OPPOSITION | WO9641827 |
| SEARCH | EP0034309 |
| SEARCH | EP0659833 |
| SEARCH | EP1695989 |
| SEARCH | US3609121 |
| SEARCH | US3801348 |
| SEARCH | WO0242349 |
| SEARCH | WO2010010045 |
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
Jun 2, 2023
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Jul 28, 2021
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Jul 22, 2021
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Authorisation
OPPO
Jul 16, 2021
Jul 16, 2021
Jan 28, 2021
Jan 28, 2021
Jan 12, 2021
Dec 18, 2020
Dec 18, 2020
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Dec 18, 2020
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Apr 15, 2020
Mar 5, 2020
Decision to grant a European patent
Search/Exam
Mar 4, 2020
Decision to allow further processing
Search/Exam
Dec 18, 2019
Jul 30, 2019
Filing of the translations of the claims
Search/Exam
Jul 30, 2019
French translation of claims
Search/Exam
Jul 30, 2019
German translation of the claims
Search/Exam
Jun 27, 2019
Jun 27, 2019
Jun 27, 2019
Intention to grant (signatures)
Search/Exam
Jun 27, 2019
Text intended for grant (clean copy)
Search/Exam
Jun 27, 2019
Jun 6, 2019
Amended claims with annotations
Search/Exam
Jun 6, 2019
Annex
Search/Exam
Jun 6, 2019
Claims
Search/Exam
Jun 6, 2019
Jun 6, 2019
Translation of the claims
Search/Exam
Jun 6, 2019
Translation of the claims
Search/Exam
Apr 4, 2019
Apr 4, 2019
Apr 4, 2019
Intention to grant (signatures)
Search/Exam
Apr 4, 2019
Text intended for grant (clean copy)
Search/Exam
Apr 4, 2019
Feb 12, 2019
Abstract
Search/Exam
Feb 12, 2019
Abstract
Search/Exam
Feb 12, 2019
Amended claims with annotations
Search/Exam
Feb 12, 2019
Amended description with annotations
Search/Exam
Feb 12, 2019
Claims
Search/Exam
Feb 12, 2019
Description
Search/Exam
Feb 12, 2019
Dec 12, 2018
Annex to the communication
Search/Exam
Dec 12, 2018
Communication from the Examining Division
Search/Exam
Dec 6, 2018
Examination started
Search/Exam
Jul 26, 2018
May 31, 2016
Reply to Written Opinion prepared by the EPO
Search/Exam
Dec 14, 2015
Nov 9, 2015
Nov 9, 2015
European search opinion
Search/Exam
Nov 9, 2015
European search report
Search/Exam
Oct 29, 2015
Search started
Search/Exam
Apr 8, 2015
Mar 9, 2015
Feb 27, 2015
Annexes in respect of a client data request
Search/Exam
Feb 27, 2015
Feb 29, 2012
Notification of forthcoming publication
Search/Exam
Feb 13, 2012
Matter concerning the application
Search/Exam
Feb 13, 2012
Feb 13, 2012
Request for grant of a European patent
Search/Exam
Jun 22, 2011
Abstract
Search/Exam
Jun 22, 2011
Claims
Search/Exam
Jun 22, 2011
Description
Search/Exam
Jun 22, 2011
Designation of inventor
Search/Exam
Jun 22, 2011
Drawings
Search/Exam
Jun 22, 2011
Matter concerning the application
Search/Exam
Jun 22, 2011
Payment of fees and costs
Search/Exam
Jun 22, 2011
Priority document
Search/Exam
Jun 22, 2011
Request for grant of a European patent
Search/Exam
Jun 21, 2011
Abstract filed by fax
Search/Exam
Jun 21, 2011
Claims filed by fax
Search/Exam
Jun 21, 2011
Description filed by fax
Search/Exam
Jun 21, 2011
Designation of inventor
Search/Exam
Jun 21, 2011
Drawings filed by fax
Search/Exam
Jun 21, 2011
Matter concerning the application
Search/Exam
Jun 21, 2011
Request for grant of a European patent
Search/Exam