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The patent EP3056268 was granted to Nippon Shokubai on Mar 22, 2023. The application was filed on Oct 9, 2014 under application number EP14852204A. 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 | Dec 21, 2023 | OFFICE FREYLINGER | ADMISSIBLE |
| STOCKHAUSEN SUPERABSORBER | Dec 21, 2023 | VOLLMER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1477349 |
| DESCRIPTION | EP1645596 |
| DESCRIPTION | EP2112172 |
| DESCRIPTION | EP2163302 |
| DESCRIPTION | JP2000007790 |
| DESCRIPTION | JP2000038407 |
| DESCRIPTION | JP2001234087 |
| DESCRIPTION | JP2003206381 |
| DESCRIPTION | JP3107873B |
| DESCRIPTION | JPH09235378 |
| DESCRIPTION | JPH11246674 |
| DESCRIPTION | JPH11315147 |
| DESCRIPTION | JPH11315148 |
| DESCRIPTION | JPS63127754 |
| DESCRIPTION | JPS63153060 |
| DESCRIPTION | US2005215734 |
| DESCRIPTION | US2006204755 |
| DESCRIPTION | US2008161512 |
| DESCRIPTION | US2008194863 |
| DESCRIPTION | US2009123197 |
| DESCRIPTION | US4863989 |
| DESCRIPTION | US4893999 |
| DESCRIPTION | US4959060 |
| DESCRIPTION | US4972019 |
| DESCRIPTION | US5599335 |
| DESCRIPTION | US5669894 |
| DESCRIPTION | US6241928 |
| DESCRIPTION | US6335406 |
| DESCRIPTION | US6710141 |
| DESCRIPTION | US6987151 |
| DESCRIPTION | US7183456 |
| DESCRIPTION | US7265190 |
| DESCRIPTION | US7473470 |
| DESCRIPTION | US7638570 |
| DESCRIPTION | US7737231 |
| DESCRIPTION | US7960269 |
| DESCRIPTION | US8182916 |
| DESCRIPTION | WO2005075070 |
| DESCRIPTION | WO2006100300 |
| DESCRIPTION | WO2011025012 |
| DESCRIPTION | WO2011025013 |
| DESCRIPTION | WO2011040530 |
| DESCRIPTION | WO2011111657 |
| DESCRIPTION | WO2011126079 |
| INTERNATIONAL-SEARCH-REPORT | JP2000007790 |
| INTERNATIONAL-SEARCH-REPORT | JP2006057075 |
| INTERNATIONAL-SEARCH-REPORT | WO2011040530 |
| INTERNATIONAL-SEARCH-REPORT | WO2013073614 |
| OPPOSITION | EP1721663 |
| OPPOSITION | EP2112172 |
| OPPOSITION | EP2163302 |
| OPPOSITION | EP2176325 |
| OPPOSITION | JP2000007790 |
| OPPOSITION | US7638570 |
| OPPOSITION | US8236876 |
| OTHER | EP1840157 |
| OTHER | KR20120081113 |
| OTHER | WO2006033477 |
| SEARCH | US2009275470 |
| SEARCH | US2012189861 |
| SEARCH | WO2010079075 |
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 19, 2025
(Electronic) Receipt
Appeal
Dec 19, 2025
Dec 19, 2025
Notice of appeal
Appeal
Oct 27, 2025
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Means of redress
OPPO
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Letter which had not been notified
Search/Exam
Apr 4, 2023
Feb 23, 2023
Decision to grant a European patent
Search/Exam
Feb 9, 2023
(Electronic) Receipt
Search/Exam
Feb 9, 2023
Filing of the translations of the claims
Search/Exam
Feb 9, 2023
French translation of claims
Search/Exam
Feb 9, 2023
German translation of the claims
Search/Exam
Jan 19, 2023
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Oct 11, 2022
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Intention to grant (signatures)
Search/Exam
Oct 11, 2022
Text intended for grant (clean copy)
Search/Exam
Oct 11, 2022
Jun 8, 2021
(Electronic) Receipt
Search/Exam
Jun 8, 2021
Amended claims with annotations
Search/Exam
Jun 8, 2021
Claims
Search/Exam
Jun 8, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 8, 2021
Apr 12, 2021
Apr 7, 2021
(Electronic) Receipt
Search/Exam
Apr 7, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 7, 2021
Dec 9, 2020
Annex to the communication
Search/Exam
Dec 9, 2020
Communication from the Examining Division
Search/Exam
Oct 28, 2020
Oct 21, 2020
Citation filed by a third party
Search/Exam
Oct 21, 2020
Citation filed by a third party
Search/Exam
Oct 21, 2020
Observations by third parties
Search/Exam
Oct 21, 2020
Patent document filed by a Third party
Search/Exam
Oct 21, 2020
Patent document filed by a Third party
Search/Exam
Oct 21, 2020
Patent document filed by a Third party
Search/Exam
Aug 20, 2020
(Electronic) Receipt
Search/Exam
Aug 20, 2020
Letter accompanying subsequently filed items
Search/Exam
Aug 20, 2020
Apr 20, 2020
Annex to the communication
Search/Exam
Apr 20, 2020
Communication from the Examining Division
Search/Exam
Apr 15, 2020
Examination started
Search/Exam
Dec 6, 2017
(Electronic) Receipt
Search/Exam
Dec 6, 2017
Dec 6, 2017
Amended claims with annotations
Search/Exam
Dec 6, 2017
Amendments received before examination
Search/Exam
Dec 6, 2017
Letter accompanying subsequently filed items
Search/Exam
Dec 6, 2017
Jun 20, 2017
May 31, 2017
May 31, 2017
Observations by third parties
Search/Exam
May 31, 2017
Patent document filed by a Third party
Search/Exam
May 31, 2017
Patent document filed by a Third party
Search/Exam
May 31, 2017
Patent document filed by a Third party
Search/Exam
May 31, 2017
Patent document filed by a Third party
Search/Exam
May 31, 2017
Patent document filed by a Third party
Search/Exam
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Patent document filed by a Third party
Search/Exam
May 31, 2017
Patent document filed by a Third party
Search/Exam
May 11, 2017
May 11, 2017
European search opinion
Search/Exam
May 11, 2017
Information on Search Strategy
Search/Exam
May 11, 2017
Supplementary European search report
Search/Exam
May 2, 2017
Search started
Search/Exam
Jul 20, 2016
Notification of forthcoming publication
Search/Exam
May 18, 2016
May 18, 2016
May 13, 2016
Communication to designated inventor
Search/Exam
May 13, 2016
Communication to designated inventor
Search/Exam
May 12, 2016
Submission concerning representation
Search/Exam
May 12, 2016
Submission concerning representation
Search/Exam
Apr 28, 2016
Apr 28, 2016
Apr 8, 2016
(Electronic) Receipt
Search/Exam
Apr 8, 2016
Abstract
Search/Exam
Apr 8, 2016
Claims
Search/Exam
Apr 8, 2016
Description
Search/Exam
Apr 8, 2016
Request for entry into the European phase
Search/Exam
Feb 19, 2016
Information on entry into European phase
Search/Exam
May 6, 2015
May 6, 2015
Apr 16, 2015
Copy of the international search report
Search/Exam
Apr 16, 2015
Apr 16, 2015
International publication pamphlet
Search/Exam