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The patent EP2129518 was granted to Imerys Filtration Minerals on May 8, 2019. The application was filed on Mar 22, 2008 under application number EP08732726A. The patent is currently recorded with a legal status of "Revoked".

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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | US4183980 |
| INTERNATIONAL-SEARCH-REPORT | US3769065 |
| INTERNATIONAL-SEARCH-REPORT | US5304526 |
| INTERNATIONAL-SEARCH-REPORT | US5540793 |
| INTERNATIONAL-SEARCH-REPORT | US6302835 |
| INTERNATIONAL-SEARCH-REPORT | US6333072 |
| OPPOSITION | CN1232004 |
| OPPOSITION | DE2909652 |
| OPPOSITION | GB1186245 |
| OPPOSITION | JPH05221746 |
| OPPOSITION | US2003224702 |
| OPPOSITION | US3769065 |
| OPPOSITION | US3961978 |
| OPPOSITION | US5344866 |
| OPPOSITION | US5833728 |
| OPPOSITION | WO2006084236 |
| SEARCH | GB1186245 |
| SEARCH | US3769065 |
| SEARCH | US4033783 |
| SEARCH | US4298554 |
| SEARCH | US4525388 |
| SEARCH | US4686253 |
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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Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Mar 7, 2025
Mar 7, 2025
Mar 7, 2025
Feb 28, 2025
(Electronic) Receipt
Appeal
Feb 28, 2025
Feb 28, 2025
Feb 28, 2025
Feb 28, 2025
Feb 28, 2025
Jan 3, 2025
Dec 20, 2024
(Electronic) Receipt
Appeal
Dec 20, 2024
Dec 20, 2024
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Dec 19, 2024
Dec 17, 2024
(Electronic) Receipt
Appeal
Dec 17, 2024
(Electronic) Receipt
Appeal
Dec 17, 2024
Dec 17, 2024
Dec 17, 2024
Dec 5, 2024
Dec 5, 2024
May 28, 2024
May 23, 2024
(Electronic) Receipt
Appeal
May 23, 2024
May 23, 2024
Apr 30, 2024
Apr 30, 2024
Apr 30, 2024
Apr 25, 2024
Jan 19, 2024
Jan 9, 2024
Oct 12, 2023
Jul 3, 2023
Jun 28, 2023
(Electronic) Receipt
Appeal
Jun 28, 2023
Jun 28, 2023
Feb 16, 2023
(Electronic) Receipt
Appeal
Feb 16, 2023
Jan 31, 2023
Jan 25, 2023
(Electronic) Receipt
Appeal
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Jan 25, 2023
Reply to appeal
Appeal
Sep 28, 2022
Document concerning representation
Search/Exam
Sep 15, 2022
Sep 12, 2022
(Electronic) Receipt
Appeal
Sep 12, 2022
Sep 12, 2022
Jul 12, 2022
Jul 12, 2022
Jul 6, 2022
(Electronic) Receipt
Appeal
Jul 6, 2022
Jul 6, 2022
Notice of appeal
Appeal
Jun 15, 2022
Jun 2, 2022
May 30, 2022
May 30, 2022
May 30, 2022
May 30, 2022
May 30, 2022
May 30, 2022
May 30, 2022
Means of redress
OPPO
May 30, 2022
May 30, 2022
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May 30, 2022
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May 10, 2022
Mar 16, 2022
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Feb 6, 2020
Feb 6, 2020
May 20, 2019
Apr 25, 2019
Submission concerning representation
Search/Exam
Apr 11, 2019
Decision to grant a European patent
Search/Exam
Mar 29, 2019
(Electronic) Receipt
Search/Exam
Mar 29, 2019
Filing of the translations of the claims
Search/Exam
Mar 29, 2019
French translation of claims
Search/Exam
Mar 29, 2019
German translation of the claims
Search/Exam
Nov 21, 2018
Nov 21, 2018
Nov 21, 2018
Intention to grant (signatures)
Search/Exam
Nov 21, 2018
Text intended for grant (clean copy)
Search/Exam
Nov 21, 2018
Sep 4, 2018
(Electronic) Receipt
Search/Exam
Sep 4, 2018
Amended description with annotations
Search/Exam
Sep 4, 2018
Amended drawings with annotations
Search/Exam
Sep 4, 2018
Description
Search/Exam
Sep 4, 2018
Drawings
Search/Exam
Sep 4, 2018
Drawings
Search/Exam
Sep 4, 2018
Letter accompanying subsequently filed items
Search/Exam
Sep 4, 2018
Apr 25, 2018
Annex to the communication
Search/Exam
Apr 25, 2018
Communication from the Examining Division
Search/Exam
Jul 11, 2017
(Electronic) Receipt
Search/Exam
Jul 11, 2017
Amended claims with annotations
Search/Exam
Jul 11, 2017
Claims
Search/Exam
Jul 11, 2017
Letter accompanying subsequently filed items
Search/Exam
Jul 11, 2017
May 15, 2017
May 9, 2017
(Electronic) Receipt
Search/Exam
May 9, 2017
Jan 2, 2017
Annex to the communication
Search/Exam
Jan 2, 2017
Communication from the Examining Division
Search/Exam
Dec 19, 2016
Examination started
Search/Exam
Sep 14, 2016
Sep 16, 2015
(Electronic) Receipt
Search/Exam
Sep 16, 2015
Sep 16, 2015
Amended claims with annotations
Search/Exam
Sep 16, 2015
Amendments received before examination
Search/Exam
Sep 16, 2015
Letter accompanying subsequently filed items
Search/Exam
Apr 29, 2015
Apr 10, 2015
Apr 10, 2015
European search opinion
Search/Exam
Apr 10, 2015
Supplementary European search report
Search/Exam
Feb 23, 2015
(Electronic) Receipt
Search/Exam
Feb 23, 2015
Letter accompanying subsequently filed items
Search/Exam
Feb 23, 2015
Dec 12, 2014
Annex to the communication
Search/Exam
Dec 12, 2014
Dec 1, 2014
Search started
Search/Exam
Jun 13, 2013
Jun 13, 2013
May 31, 2013
(Electronic) Receipt
Search/Exam
May 31, 2013
Letter accompanying subsequently filed items
Search/Exam
May 31, 2013
Sep 26, 2012
Sep 24, 2012
Sep 20, 2012
Nov 11, 2009
Nov 3, 2009
Oct 15, 2009
Sep 30, 2009
(Electronic) Receipt
Search/Exam
Sep 30, 2009
Sep 30, 2009
Sep 30, 2009
Amendments received before examination
Search/Exam
Sep 30, 2009
Request for entry into the European phase
Search/Exam
Aug 6, 2009
Information on entry into European phase
Search/Exam
Oct 21, 2008
Oct 2, 2008
Copy of the international search report
Search/Exam
Oct 2, 2008
Published international application - A1
Search/Exam