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The patent EP3530688 was granted to LG Chem on Mar 26, 2025. The application was filed on Oct 16, 2018 under application number EP18857397A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| NIPPON SHOKUBAI | Feb 16, 2022 | HERZOG PATENTANWALTS | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | KR20147018005 |
| EXAMINATION | EP3424988 |
| INTERNATIONAL-SEARCH-REPORT | JP2016112474 |
| INTERNATIONAL-SEARCH-REPORT | KR20150020030 |
| INTERNATIONAL-SEARCH-REPORT | KR20160102217 |
| INTERNATIONAL-SEARCH-REPORT | KR20170098196 |
| INTERNATIONAL-SEARCH-REPORT | US2014042364 |
| INTERNATIONAL-SEARCH-REPORT | US5409771 |
| OPPOSITION | EP2881419 |
| OPPOSITION | EP3018149 |
| OPPOSITION | EP3424988 |
| OPPOSITION | EP3530688 |
| OPPOSITION | US2016151531 |
| OPPOSITION | US5409771 |
| OPPOSITION | WO2005044915 |
| OPPOSITION | WO2006033477 |
| OPPOSITION | WO2018117390 |
| SEARCH | EP0536128 |
| SEARCH | EP2881419 |
| SEARCH | KR20170106157 |
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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Feb 27, 2025
Feb 27, 2025
Aug 13, 2024
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May 27, 2024
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Refund of fees
Appeal
May 16, 2024
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(Electronic) Receipt
Appeal
May 7, 2024
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Withdrawal of an appeal
Appeal
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(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
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Means of redress
OPPO
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Jun 1, 2021
Apr 22, 2021
Decision to grant a European patent
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Apr 7, 2021
(Electronic) Receipt
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Apr 7, 2021
Filing of the translations of the claims
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Apr 7, 2021
French translation of claims
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Apr 7, 2021
German translation of the claims
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Mar 2, 2021
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Mar 2, 2021
Intention to grant (signatures)
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Mar 2, 2021
Text intended for grant (clean copy)
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Mar 2, 2021
Feb 1, 2021
Annex to the communication
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Feb 1, 2021
Feb 1, 2021
Jan 21, 2021
(Electronic) Receipt
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Jan 21, 2021
Amended claims with annotations
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Jan 21, 2021
Amended description with annotations
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Jan 21, 2021
Claims
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Jan 21, 2021
Description
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Jan 21, 2021
Letter accompanying subsequently filed items
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Jan 21, 2021
Oct 19, 2020
(Electronic) Receipt
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Oct 19, 2020
Amended claims with annotations
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Oct 19, 2020
Amended description with annotations
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Oct 19, 2020
Claims
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Oct 19, 2020
Description
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Oct 19, 2020
Letter accompanying subsequently filed items
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Oct 19, 2020
Sep 11, 2020
Annex to the communication
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Sep 11, 2020
Communication from the Examining Division
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Sep 1, 2020
Examination started
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Jul 8, 2020
Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Jul 8, 2020
Patent document filed by a Third party
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Jun 22, 2020
(Electronic) Receipt
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Jun 22, 2020
Jun 22, 2020
Amended claims with annotations
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Jun 22, 2020
Amendments received before examination
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Jun 22, 2020
Letter accompanying subsequently filed items
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May 25, 2020
May 25, 2020
May 7, 2020
Non-patent literature filed by a third party
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May 7, 2020
Observations by third parties
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May 7, 2020
Patent document filed by a Third party
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May 7, 2020
Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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May 7, 2020
Patent document filed by a Third party
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Mar 6, 2020
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Mar 2, 2020
Annex
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Annex
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Annex
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Annex
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Mar 2, 2020
Matter concerning the application
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Mar 2, 2020
Matter concerning the application
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Mar 1, 2020
Non-patent literature filed by a third party
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Mar 1, 2020
Observations by third parties
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Mar 1, 2020
Observations by third parties
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Mar 1, 2020
Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Patent document filed by a Third party
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Mar 1, 2020
Patent document filed by a Third party
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Mar 1, 2020
Patent document filed by a Third party
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Jan 10, 2020
Dec 16, 2019
Dec 16, 2019
European search opinion
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Dec 16, 2019
Information on Search Strategy
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Dec 16, 2019
Supplementary European search report
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Dec 4, 2019
Search started
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Sep 2, 2019
Sep 2, 2019
Aug 26, 2019
Letter which had not been notified
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Aug 26, 2019
Letter which had not been notified
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Jul 31, 2019
Notification of forthcoming publication
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Jul 24, 2019
Communication to designated inventor
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Jul 24, 2019
Communication to designated inventor
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Jul 24, 2019
Jul 18, 2019
Reply by International Bureau
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Jul 18, 2019
Jul 18, 2019
May 23, 2019
May 20, 2019
May 16, 2019
May 16, 2019
Copy of the international search report
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May 16, 2019
May 16, 2019
International publication pamphlet
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May 9, 2019
Enquiry with the International Bureau
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Mar 26, 2019
(Electronic) Receipt
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Mar 26, 2019
Abstract
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Mar 26, 2019
Claims
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Mar 26, 2019
Description
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Mar 26, 2019
Request for entry into the European phase
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