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The patent EP3423512 was granted to Michelman on Nov 24, 2021. The application was filed on Feb 28, 2017 under application number EP17712573A. 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 |
|---|---|---|---|
| KEMIRA OYJ | Aug 19, 2022 | PAGE WHITE FARRER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2015005174 |
| DESCRIPTION | US6716911 |
| DESCRIPTION | US9085688 |
| INTERNATIONAL-SEARCH-REPORT | US2007088099 |
| INTERNATIONAL-SEARCH-REPORT | US2011237710 |
| INTERNATIONAL-SEARCH-REPORT | WO2012149407 |
| INTERNATIONAL-SEARCH-REPORT | WO2014023319 |
| OPPOSITION | CA2849663 |
| OPPOSITION | US2005058712 |
| OPPOSITION | US2007088099 |
| OPPOSITION | US2011237710 |
| OPPOSITION | US6716911 |
| OPPOSITION | US9085688 |
| OPPOSITION | WO2014023319 |
| OTHER | JP3685157B |
| OTHER | US2005058712 |
| OTHER | WO2012169518 |
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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Sep 29, 2025
Sep 29, 2025
Sep 17, 2025
Sep 12, 2025
(Electronic) Receipt
Appeal
Sep 12, 2025
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(Electronic) Receipt
Appeal
Aug 6, 2025
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(Electronic) Receipt
Appeal
Apr 16, 2025
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Nov 27, 2024
Nov 21, 2024
(Electronic) Receipt
Appeal
Nov 21, 2024
Nov 21, 2024
Reply to appeal
Appeal
Jul 24, 2024
Jul 19, 2024
(Electronic) Receipt
Appeal
Jul 19, 2024
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(Electronic) Receipt
Appeal
May 16, 2024
May 16, 2024
Notice of appeal
Appeal
Mar 19, 2024
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Means of redress
OPPO
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Dec 7, 2021
Oct 28, 2021
Decision to grant a European patent
Search/Exam
Oct 15, 2021
(Electronic) Receipt
Search/Exam
Oct 15, 2021
Filing of the translations of the claims
Search/Exam
Oct 15, 2021
French translation of claims
Search/Exam
Oct 15, 2021
German translation of the claims
Search/Exam
Oct 15, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 17, 2021
Jun 17, 2021
Jun 17, 2021
Intention to grant (signatures)
Search/Exam
Jun 17, 2021
Text intended for grant (clean copy)
Search/Exam
Jun 17, 2021
Apr 2, 2021
(Electronic) Receipt
Search/Exam
Apr 2, 2021
Amended description with annotations
Search/Exam
Apr 2, 2021
Description
Search/Exam
Apr 2, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 2, 2021
Feb 17, 2021
Jan 20, 2021
Nov 27, 2020
Annex to the communication
Search/Exam
Nov 27, 2020
Communication from the Examining Division
Search/Exam
Sep 23, 2020
(Electronic) Receipt
Search/Exam
Sep 23, 2020
Amended claims with annotations
Search/Exam
Sep 23, 2020
Amended description with annotations
Search/Exam
Sep 23, 2020
Claims
Search/Exam
Sep 23, 2020
Description
Search/Exam
Sep 23, 2020
Letter accompanying subsequently filed items
Search/Exam
Sep 23, 2020
May 29, 2020
Annex to the communication
Search/Exam
May 29, 2020
Communication from the Examining Division
Search/Exam
Apr 16, 2020
Apr 16, 2020
Apr 8, 2020
(Electronic) Receipt
Search/Exam
Apr 8, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 8, 2020
Non-patent literature filed by a third party
Search/Exam
Apr 8, 2020
Observations by third parties
Search/Exam
Apr 8, 2020
Patent document filed by a Third party
Search/Exam
Apr 8, 2020
Patent document filed by a Third party
Search/Exam
Apr 8, 2020
Patent document filed by a Third party
Search/Exam
Mar 17, 2020
(Electronic) Receipt
Search/Exam
Mar 17, 2020
Amended claims with annotations
Search/Exam
Mar 17, 2020
Claims
Search/Exam
Mar 17, 2020
Letter accompanying subsequently filed items
Search/Exam
Mar 17, 2020
Nov 21, 2019
Annex to the communication
Search/Exam
Nov 21, 2019
Communication from the Examining Division
Search/Exam
Sep 4, 2019
(Electronic) Receipt
Search/Exam
Sep 4, 2019
Letter accompanying subsequently filed items
Search/Exam
Sep 4, 2019
Aug 20, 2019
Aug 12, 2019
Examination started
Search/Exam
Mar 13, 2019
Refund of fees
Search/Exam
Dec 12, 2018
Oct 12, 2018
Oct 10, 2018
Communication to designated inventor
Search/Exam
Oct 10, 2018
Communication to designated inventor
Search/Exam
Oct 10, 2018
Communication to designated inventor
Search/Exam
Oct 10, 2018
Communication to designated inventor
Search/Exam
Oct 10, 2018
Communication to designated inventor
Search/Exam
Sep 28, 2018
(Electronic) Receipt
Search/Exam
Sep 28, 2018
Sep 28, 2018
Amended claims with annotations
Search/Exam
Sep 28, 2018
Amendments received before examination
Search/Exam
Sep 28, 2018
Request for entry into the European phase
Search/Exam
Sep 19, 2018
Jul 13, 2018
Information on entry into European phase
Search/Exam
Sep 25, 2017
Sep 8, 2017
Copy of the international search report
Search/Exam
Sep 8, 2017
Published international application - A1
Search/Exam
Jun 30, 2017
Jun 30, 2017
May 29, 2017
ISR: cited documents
PCTISA
May 26, 2017
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Apr 4, 2017
Mar 13, 2017
Abstract
PCTISA
Mar 13, 2017
Annex
PCTISA
Mar 13, 2017
Claims
PCTISA
Mar 13, 2017
Description
PCTISA
Mar 13, 2017
Mar 13, 2017
Mar 13, 2017
Mar 13, 2017