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The patent EP3711722 was granted to Nippon Shokubai on Jun 19, 2024. The application was filed on Nov 14, 2018 under application number EP18877665A. 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 |
|---|---|---|---|
| STOCKHAUSEN SUPERABSORBER | Mar 19, 2025 | OFFICE FREYLINGER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2005522391 |
| DESCRIPTION | JP2006528119 |
| DESCRIPTION | JP2009123197U |
| DESCRIPTION | JP2009511393 |
| DESCRIPTION | JP3659645B |
| DESCRIPTION | JPH05503492 |
| DESCRIPTION | JPH0857311 |
| DESCRIPTION | JPS548575B |
| DESCRIPTION | US2005215734 |
| DESCRIPTION | US2008161512 |
| DESCRIPTION | US2008194863 |
| DESCRIPTION | US2009123197 |
| DESCRIPTION | US4893999 |
| DESCRIPTION | US5051041 |
| DESCRIPTION | US5244735 |
| DESCRIPTION | US5355993 |
| DESCRIPTION | US5669894 |
| DESCRIPTION | US5981070 |
| DESCRIPTION | US6241928 |
| DESCRIPTION | US6710141 |
| DESCRIPTION | US6987151 |
| DESCRIPTION | US7183456 |
| DESCRIPTION | US7265190 |
| DESCRIPTION | US7638570 |
| DESCRIPTION | WO2004096304 |
| DESCRIPTION | WO2005075070 |
| DESCRIPTION | WO2006100300 |
| DESCRIPTION | WO2006109844 |
| DESCRIPTION | WO2008120742 |
| DESCRIPTION | WO2011025012 |
| DESCRIPTION | WO2011025013 |
| DESCRIPTION | WO2011040530 |
| DESCRIPTION | WO2011111657 |
| DESCRIPTION | WO2011126079 |
| INTERNATIONAL-SEARCH-REPORT | JP2001137704 |
| INTERNATIONAL-SEARCH-REPORT | JP2004261796 |
| INTERNATIONAL-SEARCH-REPORT | JP2013039804 |
| INTERNATIONAL-SEARCH-REPORT | JP2014073448 |
| INTERNATIONAL-SEARCH-REPORT | WO2005075070 |
| INTERNATIONAL-SEARCH-REPORT | WO2014162843 |
| INTERNATIONAL-SEARCH-REPORT | WO2017170605 |
| OPPOSITION | EP1721663 |
| OPPOSITION | EP3112022 |
| OPPOSITION | EP3437732 |
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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Jul 2, 2024
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Decision to grant a European patent
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May 8, 2024
(Electronic) Receipt
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May 8, 2024
French translation of claims
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May 8, 2024
German translation of the claims
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May 8, 2024
Letter accompanying subsequently filed items
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Feb 20, 2024
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Intention to grant (signatures)
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Feb 20, 2024
Text intended for grant (clean copy)
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Feb 20, 2024
Aug 1, 2023
(Electronic) Receipt
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Aug 1, 2023
Amended description with annotations
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Aug 1, 2023
Description
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Aug 1, 2023
Letter accompanying subsequently filed items
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Aug 1, 2023
May 31, 2023
Annex to the communication
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May 31, 2023
Communication from the Examining Division
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May 17, 2023
(Electronic) Receipt
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May 17, 2023
Amended claims with annotations
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May 17, 2023
Amended claims with annotations
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Amended claims with annotations
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Amended claims with annotations
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Amended claims with annotations
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Amended claims with annotations
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Amended claims with annotations
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May 17, 2023
Claims
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Claims
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Claims
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May 17, 2023
Letter accompanying subsequently filed items
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May 17, 2023
Jan 20, 2023
Annex to the communication
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Jan 20, 2023
Communication from the Examining Division
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Jan 16, 2023
Examination started
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Jan 7, 2022
(Electronic) Receipt
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Jan 7, 2022
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Amended claims with annotations
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Jan 7, 2022
Amendments received before examination
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Jan 7, 2022
Amendments received before examination
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Jan 7, 2022
Letter accompanying subsequently filed items
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Aug 17, 2021
Jul 29, 2021
Jul 29, 2021
European search opinion
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Jul 29, 2021
Information on Search Strategy
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Jul 29, 2021
Supplementary European search report
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Jun 29, 2021
(Electronic) Receipt
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Jun 29, 2021
Letter accompanying subsequently filed items
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Jun 29, 2021
May 3, 2021
Annex to the communication
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May 3, 2021
Apr 20, 2021
Search started
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Sep 14, 2020
(Electronic) Receipt
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Sep 14, 2020
Sep 14, 2020
Amended description with annotations
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Sep 14, 2020
Amendments received before examination
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Sep 14, 2020
Letter accompanying subsequently filed items
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Aug 26, 2020
Notification of forthcoming publication
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Jun 23, 2020
Jun 19, 2020
Communication to designated inventor
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Jun 19, 2020
Communication to designated inventor
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Jun 19, 2020
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Jun 19, 2020
Communication to designated inventor
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Jun 4, 2020
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May 14, 2020
(Electronic) Receipt
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May 14, 2020
Abstract
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May 14, 2020
Claims
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May 14, 2020
Description
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May 14, 2020
Drawings
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May 14, 2020
Request for entry into the European phase
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Mar 27, 2020
Information on entry into European phase
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Jun 12, 2019
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May 23, 2019
Copy of the international search report
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May 23, 2019
May 23, 2019
International publication pamphlet
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