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The patent EP3683871 was granted to LG Chem on Dec 1, 2021. The application was filed on Oct 26, 2018 under application number EP18869600A. 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 |
|---|---|---|---|
| ZWICKER SCHNAPPAUF & PARTNER | Sep 1, 2022 | GELING | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | KR20160149862 |
| INTERNATIONAL-SEARCH-REPORT | JP2014241302 |
| INTERNATIONAL-SEARCH-REPORT | KR20150032015 |
| INTERNATIONAL-SEARCH-REPORT | KR20160023845 |
| INTERNATIONAL-SEARCH-REPORT | KR20160084600 |
| INTERNATIONAL-SEARCH-REPORT | KR20170007140 |
| OPPOSITION | EP2879216 |
| OPPOSITION | JP2013200984 |
| OPPOSITION | JP2015164127 |
| OPPOSITION | US2004023115 |
| OPPOSITION | US2017309892 |
| OPPOSITION | US6287729 |
| OPPOSITION | WO2016067539 |
| SEARCH | JP2014241302 |
| SEARCH | KR20150032014 |
| SEARCH | US2014349180 |
| SEARCH | US2016197342 |
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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Annexes in respect of a client data request
Search/Exam
Feb 16, 2022
Letter accompanying subsequently filed items
Search/Exam
Feb 16, 2022
Dec 17, 2021
Dec 14, 2021
Dec 9, 2021
Annexes in respect of a client data request
Search/Exam
Dec 9, 2021
Annexes in respect of a client data request
Search/Exam
Dec 9, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 9, 2021
Nov 5, 2021
Decision to grant a European patent
Search/Exam
Sep 14, 2021
(Electronic) Receipt
Search/Exam
Sep 14, 2021
Filing of the translations of the claims
Search/Exam
Sep 14, 2021
French translation of claims
Search/Exam
Sep 14, 2021
German translation of the claims
Search/Exam
Sep 14, 2021
Letter accompanying subsequently filed items
Search/Exam
Jul 15, 2021
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Intention to grant (signatures)
Search/Exam
Jul 15, 2021
Text intended for grant (clean copy)
Search/Exam
Jul 15, 2021
Jun 29, 2021
Examination started
Search/Exam
Mar 16, 2021
(Electronic) Receipt
Search/Exam
Mar 16, 2021
Mar 16, 2021
Amended claims with annotations
Search/Exam
Mar 16, 2021
Amendments received before examination
Search/Exam
Mar 16, 2021
Letter accompanying subsequently filed items
Search/Exam
Oct 29, 2020
Oct 12, 2020
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European search opinion
Search/Exam
Oct 12, 2020
Information on Search Strategy
Search/Exam
Oct 12, 2020
Supplementary European search report
Search/Exam
Sep 28, 2020
Search started
Search/Exam
Aug 20, 2020
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Aug 17, 2020
Letter which had not been notified
Search/Exam
Aug 14, 2020
Letter which had not been notified
Search/Exam
Aug 14, 2020
Letter which had not been notified
Search/Exam
Aug 14, 2020
Letter which had not been notified
Search/Exam
Aug 14, 2020
Letter which had not been notified
Search/Exam
Aug 14, 2020
Letter which had not been notified
Search/Exam
Jun 24, 2020
Notification of forthcoming publication
Search/Exam
May 16, 2020
Annex
Search/Exam
May 16, 2020
May 16, 2020
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May 11, 2020
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May 7, 2020
Enquiry with the International Bureau
Search/Exam
Apr 29, 2020
Communication to designated inventor
Search/Exam
Apr 29, 2020
Communication to designated inventor
Search/Exam
Apr 29, 2020
Communication to designated inventor
Search/Exam
Apr 29, 2020
Communication to designated inventor
Search/Exam
Apr 29, 2020
Communication to designated inventor
Search/Exam
Apr 29, 2020
Communication to designated inventor
Search/Exam
Apr 29, 2020
Apr 29, 2020
Apr 15, 2020
(Electronic) Receipt
Search/Exam
Apr 15, 2020
Abstract
Search/Exam
Apr 15, 2020
Annex
Search/Exam
Apr 15, 2020
Claims
Search/Exam
Apr 15, 2020
Description
Search/Exam
Apr 15, 2020
Request for entry into the European phase
Search/Exam
Mar 6, 2020
Information on entry into European phase
Search/Exam
Jun 13, 2019
Copy of the international search report
Search/Exam
Jun 13, 2019
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International publication pamphlet
Search/Exam