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The patent EP3256317 was granted to Nova Chemicals on Sep 18, 2019. The application was filed on Feb 4, 2016 under application number EP16704279A. 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.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| SABIC SABIC PETROCHEMICALS | Jun 17, 2020 | SABIC GROUP | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | CA2612940 |
| DESCRIPTION | US2012033901 |
| DESCRIPTION | US5342868 |
| DESCRIPTION | US5981636 |
| DESCRIPTION | US6465551 |
| DESCRIPTION | US6599971 |
| DESCRIPTION | US6722106 |
| DESCRIPTION | US7737220 |
| INTERNATIONAL-SEARCH-REPORT | US2005255268 |
| INTERNATIONAL-SEARCH-REPORT | US2012033901 |
| INTERNATIONAL-SEARCH-REPORT | US2013095335 |
| INTERNATIONAL-SEARCH-REPORT | US5843540 |
| OPPOSITION | EP0571682 |
| OPPOSITION | EP1902837 |
| OPPOSITION | US2005255268 |
| OPPOSITION | US2006233987 |
| OPPOSITION | US2011252745 |
| OPPOSITION | US2012033901 |
| OPPOSITION | US2013225742 |
| OPPOSITION | WO2012003042 |
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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Nov 11, 2022
Nov 10, 2022
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May 11, 2022
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Apr 15, 2022
(Electronic) Receipt
Appeal
Apr 15, 2022
Apr 15, 2022
Notice of appeal
Appeal
Feb 28, 2022
Feb 28, 2022
Feb 28, 2022
Feb 18, 2022
Feb 18, 2022
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Means of redress
OPPO
Feb 18, 2022
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Feb 2, 2022
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Feb 18, 2021
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Feb 4, 2021
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Nov 17, 2020
Nov 11, 2020
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Jun 17, 2020
Mar 19, 2020
Document concerning representation
Search/Exam
Sep 30, 2019
Aug 22, 2019
Decision to grant a European patent
Search/Exam
Aug 7, 2019
(Electronic) Receipt
Search/Exam
Aug 7, 2019
French translation of claims
Search/Exam
Aug 7, 2019
German translation of the claims
Search/Exam
Aug 7, 2019
Letter accompanying subsequently filed items
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 7, 2019
Examination started
Search/Exam
Dec 20, 2018
Dec 14, 2018
Dec 13, 2018
Mar 20, 2018
(Electronic) Receipt
Search/Exam
Mar 20, 2018
Mar 20, 2018
Amended claims with annotations
Search/Exam
Mar 20, 2018
Mar 20, 2018
Amendments received before examination
Search/Exam
Mar 20, 2018
Letter accompanying subsequently filed items
Search/Exam
Nov 22, 2017
Sep 19, 2017
Sep 15, 2017
Communication to designated inventor
Search/Exam
Aug 30, 2017
Jun 23, 2017
Information on entry into European phase
Search/Exam
Jun 16, 2017
(Electronic) Receipt
Search/Exam
Jun 16, 2017
Jun 16, 2017
Amended claims with annotations
Search/Exam
Jun 16, 2017
Matter concerning the application
Search/Exam
Jun 16, 2017
Request for entry into the European phase
Search/Exam
Jun 16, 2017
Submission concerning representation
Search/Exam
Sep 6, 2016
Aug 18, 2016
Copy of the international search report
Search/Exam
Aug 18, 2016
Published international application - A1
Search/Exam
May 11, 2016
ISR: cited documents
PCTISA
May 10, 2016
May 10, 2016
May 10, 2016
Mar 1, 2016
Feb 11, 2016
Abstract
PCTISA
Feb 11, 2016
Annex
PCTISA
Feb 11, 2016
Annex
PCTISA
Feb 11, 2016
Claims
PCTISA
Feb 11, 2016
Description
PCTISA
Feb 11, 2016