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The patent EP3535122 was granted to Kuraray Europe on Jun 28, 2023. The application was filed on Nov 6, 2017 under application number EP17804088A. 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 |
|---|---|---|---|
| EASTMAN CHEMICAL | Mar 28, 2024 | WALLINGER RICKER SCHLOTTER TOSTMANN | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1235683 |
| DESCRIPTION | EP1527107 |
| DESCRIPTION | EP1606325 |
| DESCRIPTION | WO03020776 |
| DESCRIPTION | WO2004063231 |
| DESCRIPTION | WO2005059013 |
| INTERNATIONAL-SEARCH-REPORT | EP3246157 |
| INTERNATIONAL-SEARCH-REPORT | JP2001163640 |
| INTERNATIONAL-SEARCH-REPORT | US2011076473 |
| INTERNATIONAL-SEARCH-REPORT | US2012067404 |
| INTERNATIONAL-SEARCH-REPORT | US2015217540 |
| INTERNATIONAL-SEARCH-REPORT | US2016263866 |
| OPPOSITION | EP0419438 |
| OPPOSITION | EP2905130 |
| OPPOSITION | JP2001163640 |
| OPPOSITION | US2012067404 |
| OPPOSITION | US9248628 |
| OPPOSITION | WO9703763 |
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
Search/Exam
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Authorisation
OPPO
Aug 13, 2024
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Authorisation
OPPO
Jul 25, 2024
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Mar 28, 2024
Jul 11, 2023
Jun 2, 2023
Decision to grant a European patent
Search/Exam
May 23, 2023
(Electronic) Receipt
Search/Exam
May 23, 2023
Filing of the translations of the claims
Search/Exam
May 23, 2023
French translation of claims
Search/Exam
May 23, 2023
German translation of the claims
Search/Exam
May 23, 2023
Letter accompanying subsequently filed items
Search/Exam
Feb 6, 2023
Feb 6, 2023
Feb 6, 2023
Feb 6, 2023
Intention to grant (signatures)
Search/Exam
Feb 6, 2023
Text intended for grant (clean copy)
Search/Exam
Feb 6, 2023
Jan 18, 2023
Annex to the communication
Search/Exam
Jan 18, 2023
Consultation by telephone/in person
Search/Exam
Jan 18, 2023
Nov 25, 2022
(Electronic) Receipt
Search/Exam
Nov 25, 2022
Amended claims with annotations
Search/Exam
Nov 25, 2022
Amended description with annotations
Search/Exam
Nov 25, 2022
Annex
Search/Exam
Nov 25, 2022
Annex
Search/Exam
Nov 25, 2022
Annex
Search/Exam
Nov 25, 2022
Claims
Search/Exam
Nov 25, 2022
Description
Search/Exam
Nov 25, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 25, 2022
Aug 5, 2022
Annex to the communication
Search/Exam
Aug 5, 2022
Communication from the Examining Division
Search/Exam
May 11, 2022
(Electronic) Receipt
Search/Exam
May 11, 2022
Amended claims with annotations
Search/Exam
May 11, 2022
Claims
Search/Exam
May 11, 2022
Letter accompanying subsequently filed items
Search/Exam
May 11, 2022
Mar 16, 2022
Annex to the communication
Search/Exam
Mar 16, 2022
Communication from the Examining Division
Search/Exam
Jan 21, 2022
(Electronic) Receipt
Search/Exam
Jan 21, 2022
Letter accompanying subsequently filed items
Search/Exam
Jan 21, 2022
Oct 8, 2021
Annex to the communication
Search/Exam
Oct 8, 2021
Communication from the Examining Division
Search/Exam
Jul 27, 2021
(Electronic) Receipt
Search/Exam
Jul 27, 2021
Amended claims with annotations
Search/Exam
Jul 27, 2021
Claims
Search/Exam
Jul 27, 2021
Letter accompanying subsequently filed items
Search/Exam
Jul 27, 2021
Jun 24, 2021
Annex to the communication
Search/Exam
Jun 24, 2021
Communication from the Examining Division
Search/Exam
Jun 10, 2021
Examination started
Search/Exam
Feb 18, 2020
(Electronic) Receipt
Search/Exam
Feb 18, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 18, 2020
Feb 11, 2020
Jan 22, 2020
Nov 4, 2019
(Electronic) Receipt
Search/Exam
Nov 4, 2019
Nov 4, 2019
Amended claims with annotations
Search/Exam
Nov 4, 2019
Amendments received before examination
Search/Exam
Nov 4, 2019
Letter accompanying subsequently filed items
Search/Exam
Oct 14, 2019
Aug 14, 2019
Jun 17, 2019
Jun 13, 2019
Communication to designated inventor
Search/Exam
May 21, 2019
May 20, 2019
Refund of fees
Search/Exam
May 8, 2019
(Electronic) Receipt
Search/Exam
May 8, 2019
Request for entry into the European phase
Search/Exam
Mar 15, 2019
Information on entry into European phase
Search/Exam
May 28, 2018
May 11, 2018
Copy of the international search report
Search/Exam
May 11, 2018
Published international application - A1
Search/Exam
Apr 3, 2018
Apr 3, 2018
Apr 3, 2018
Dec 1, 2017
Nov 6, 2017
(Electronic) Receipt
PCTRO
Nov 6, 2017
Abstract
PCTRO
Nov 6, 2017
Claims
PCTRO
Nov 6, 2017
Description
PCTRO
Nov 6, 2017
Nov 6, 2017
Drawings
PCTRO
Nov 6, 2017