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The patent EP3401070 was granted to Nippon Shokubai on Apr 21, 2021. The application was filed on Aug 28, 2014 under application number EP18180781A. 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 |
|---|---|---|---|
| EVONIK SUPERABSORBER | Jan 17, 2022 | VOLLMER | ADMISSIBLE |
| STOCKHAUSEN SUPERABSORBER | Jan 17, 2022 | OFFICE FREYLINGER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0349240 |
| DESCRIPTION | EP0574260 |
| DESCRIPTION | EP1594556 |
| DESCRIPTION | JP2000302876 |
| DESCRIPTION | JPH06107800 |
| DESCRIPTION | US2005048221 |
| DESCRIPTION | US2005070671 |
| DESCRIPTION | US2005215734 |
| DESCRIPTION | US2005288182 |
| DESCRIPTION | US2006073969 |
| DESCRIPTION | US2006247351 |
| DESCRIPTION | US2007106013 |
| DESCRIPTION | US2009239966 |
| DESCRIPTION | US4783510 |
| DESCRIPTION | US4893999 |
| DESCRIPTION | US5562646 |
| DESCRIPTION | US5669894 |
| DESCRIPTION | US6071976 |
| DESCRIPTION | US6140395 |
| DESCRIPTION | US6228930 |
| DESCRIPTION | US6241928 |
| DESCRIPTION | US6254990 |
| DESCRIPTION | US6562879 |
| DESCRIPTION | US6565768 |
| DESCRIPTION | US6599989 |
| DESCRIPTION | US6605673 |
| DESCRIPTION | US6620889 |
| DESCRIPTION | US6710141 |
| DESCRIPTION | US6906159 |
| DESCRIPTION | US6987171 |
| DESCRIPTION | US7091253 |
| DESCRIPTION | US7098284 |
| DESCRIPTION | US7157141 |
| DESCRIPTION | US7473739 |
| DESCRIPTION | US7638570 |
| DESCRIPTION | US7694900 |
| DESCRIPTION | WO2005016393 |
| DESCRIPTION | WO2006062258 |
| DESCRIPTION | WO2006082188 |
| DESCRIPTION | WO2006082189 |
| DESCRIPTION | WO2006082197 |
| DESCRIPTION | WO2006111402 |
| DESCRIPTION | WO2006111403 |
| DESCRIPTION | WO2006111404 |
| DESCRIPTION | WO2007121037 |
| DESCRIPTION | WO2008009842 |
| DESCRIPTION | WO2008009843 |
| DESCRIPTION | WO2008090961 |
| DESCRIPTION | WO2009016055 |
| DESCRIPTION | WO2009048160 |
| DESCRIPTION | WO2011034147 |
| DESCRIPTION | WO2011078298 |
| DESCRIPTION | WO2011126079 |
| OPPOSITION | US6562879 |
| SEARCH | EP3040361 |
| SEARCH | US2009182294 |
| SEARCH | US2009312183 |
| SEARCH | US2012258851 |
| SEARCH | US2012296057 |
| SEARCH | US2013026412 |
| SEARCH | US6254990 |
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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Dec 9, 2025
Dec 9, 2025
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Oct 15, 2025
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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General authorisation
Appeal
Apr 10, 2025
General authorisation
Appeal
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(Electronic) Receipt
Appeal
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Appeal
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Appeal
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Appeal
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(Electronic) Receipt
Appeal
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Apr 30, 2024
(Electronic) Receipt
Appeal
Apr 30, 2024
Apr 30, 2024
Reply to appeal
Appeal
Apr 10, 2024
Jan 4, 2024
Dec 21, 2023
(Electronic) Receipt
Appeal
Dec 21, 2023
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Oct 30, 2023
(Electronic) Receipt
Appeal
Oct 30, 2023
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Notice of appeal
Appeal
Sep 4, 2023
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Means of redress
OPPO
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Description
OPPO
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OPPO
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May 4, 2021
Mar 25, 2021
Decision to grant a European patent
Search/Exam
Mar 15, 2021
(Electronic) Receipt
Search/Exam
Mar 15, 2021
Filing of the translations of the claims
Search/Exam
Mar 15, 2021
French translation of claims
Search/Exam
Mar 15, 2021
German translation of the claims
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Mar 15, 2021
Letter accompanying subsequently filed items
Search/Exam
Dec 14, 2020
Dec 14, 2020
Dec 14, 2020
Intention to grant (signatures)
Search/Exam
Dec 14, 2020
Text intended for grant (clean copy)
Search/Exam
Dec 14, 2020
Sep 28, 2020
(Electronic) Receipt
Search/Exam
Sep 28, 2020
Drawings
Search/Exam
Sep 28, 2020
Letter accompanying subsequently filed items
Search/Exam
Sep 28, 2020
Aug 5, 2020
Annex to the communication
Search/Exam
Aug 5, 2020
Communication from the Examining Division
Search/Exam
Jun 30, 2020
(Electronic) Receipt
Search/Exam
Jun 30, 2020
Amended claims with annotations
Search/Exam
Jun 30, 2020
Amended description with annotations
Search/Exam
Jun 30, 2020
Claims
Search/Exam
Jun 30, 2020
Description
Search/Exam
Jun 30, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 30, 2020
Jun 2, 2020
Annex to the communication
Search/Exam
Jun 2, 2020
Communication from the Examining Division
Search/Exam
Feb 3, 2020
(Electronic) Receipt
Search/Exam
Feb 3, 2020
Amended claims with annotations
Search/Exam
Feb 3, 2020
Claims
Search/Exam
Feb 3, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 3, 2020
Nov 19, 2019
Annex to the communication
Search/Exam
Nov 19, 2019
Communication from the Examining Division
Search/Exam
Jun 21, 2019
(Electronic) Receipt
Search/Exam
Jun 21, 2019
Letter accompanying subsequently filed items
Search/Exam
Jun 21, 2019
Jun 21, 2019
Mar 27, 2019
Annex to the communication
Search/Exam
Mar 27, 2019
Communication from the Examining Division
Search/Exam
Jan 8, 2019
(Electronic) Receipt
Search/Exam
Jan 8, 2019
Jan 8, 2019
Amended claims with annotations
Search/Exam
Jan 8, 2019
Jan 8, 2019
Amendments received before examination
Search/Exam
Jan 8, 2019
Letter accompanying subsequently filed items
Search/Exam
Nov 19, 2018
Oct 17, 2018
Notification of forthcoming publication
Search/Exam
Aug 22, 2018
Communication to designated inventor
Search/Exam
Aug 22, 2018
Communication to designated inventor
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Aug 22, 2018
Communication to designated inventor
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Aug 22, 2018
Communication to designated inventor
Search/Exam
Aug 22, 2018
Communication to designated inventor
Search/Exam
Aug 22, 2018
Communication to designated inventor
Search/Exam
Aug 9, 2018
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European search opinion
Search/Exam
Aug 9, 2018
European search report
Search/Exam
Aug 9, 2018
Information on Search Strategy
Search/Exam
Aug 3, 2018
Modified abstract
Search/Exam
Jun 29, 2018
Abstract
Search/Exam
Jun 29, 2018
Jun 29, 2018
Claims
Search/Exam
Jun 29, 2018
Description
Search/Exam
Jun 29, 2018
Designation of inventor
Search/Exam
Jun 29, 2018
Drawings
Search/Exam
Jun 29, 2018
Request for grant of a European patent
Search/Exam
Mar 23, 2015
Mar 23, 2015