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The patent EP3578843 was granted to Sumitomo Bakelite on Oct 11, 2023. The application was filed on Jan 24, 2018 under application number EP18748378A. 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 |
|---|---|---|---|
| VRI PATENT MONITORING ASSOCIATION | Jul 9, 2024 | IPSILON BENELUX | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2002206578 |
| DESCRIPTION | JP2015163816 |
| DESCRIPTION | JP2017018286 |
| DESCRIPTION | WO2014061521 |
| INTERNATIONAL-SEARCH-REPORT | JP2010255773 |
| INTERNATIONAL-SEARCH-REPORT | JPH10299797 |
| INTERNATIONAL-SEARCH-REPORT | JPS6170963 |
| INTERNATIONAL-SEARCH-REPORT | US2003155193 |
| OPPOSITION | JP2006002885 |
| OPPOSITION | JP2010255773 |
| OPPOSITION | US2012160616 |
| OPPOSITION | US2016195147 |
| SEARCH | EP2975287 |
| SEARCH | JP2010255773 |
| SEARCH | JP2012072852 |
| SEARCH | JP2012211676 |
| SEARCH | US5093057 |
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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Decision to grant a European patent
Search/Exam
Sep 5, 2023
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(Electronic) Receipt
Search/Exam
Aug 31, 2023
Annexes in respect of a client data request
Search/Exam
Aug 31, 2023
Annexes in respect of a client data request
Search/Exam
Aug 31, 2023
Filing of the translations of the claims
Search/Exam
Aug 31, 2023
French translation of claims
Search/Exam
Aug 31, 2023
German translation of the claims
Search/Exam
Aug 31, 2023
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Intention to grant (signatures)
Search/Exam
May 11, 2023
Text intended for grant (clean copy)
Search/Exam
May 11, 2023
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Annex to the communication
Search/Exam
May 3, 2023
Consultation by telephone/in person
Search/Exam
May 3, 2023
Jan 19, 2023
Annex to the communication
Search/Exam
Jan 19, 2023
Communication from the Examining Division
Search/Exam
Jan 13, 2022
(Electronic) Receipt
Search/Exam
Jan 13, 2022
Amended claims with annotations
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Amended description with annotations
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Jan 13, 2022
Claims
Search/Exam
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Description
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Jan 13, 2022
Drawings
Search/Exam
Jan 13, 2022
Letter accompanying subsequently filed items
Search/Exam
Jan 13, 2022
Sep 3, 2021
Annex to the communication
Search/Exam
Sep 3, 2021
Communication from the Examining Division
Search/Exam
Aug 31, 2021
Examination started
Search/Exam
Mar 5, 2021
(Electronic) Receipt
Search/Exam
Mar 5, 2021
Mar 5, 2021
Amended claims with annotations
Search/Exam
Mar 5, 2021
Amendments received before examination
Search/Exam
Mar 5, 2021
Letter accompanying subsequently filed items
Search/Exam
Nov 19, 2020
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European search opinion
Search/Exam
Nov 2, 2020
Information on Search Strategy
Search/Exam
Nov 2, 2020
Supplementary European search report
Search/Exam
Oct 21, 2020
Search started
Search/Exam
Nov 13, 2019
Notification of forthcoming publication
Search/Exam
Sep 13, 2019
Sep 11, 2019
Communication to designated inventor
Search/Exam
Sep 11, 2019
Communication to designated inventor
Search/Exam
Sep 11, 2019
Communication to designated inventor
Search/Exam
Aug 27, 2019
(Electronic) Receipt
Search/Exam
Aug 27, 2019
Abstract
Search/Exam
Aug 27, 2019
Claims
Search/Exam
Aug 27, 2019
Description
Search/Exam
Aug 27, 2019
Drawings
Search/Exam
Aug 27, 2019
Request for entry into the European phase
Search/Exam
Aug 19, 2019
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Jun 14, 2019
Information on entry into European phase
Search/Exam
Aug 29, 2018
Aug 9, 2018
Copy of the international search report
Search/Exam
Aug 9, 2018
Aug 9, 2018
International publication pamphlet
Search/Exam