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The patent EP3454656 was granted to Kemira OYJ on Sep 23, 2020. The application was filed on May 12, 2017 under application number EP17727274A. 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.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| LANXESS DEUTSCHLAND | Jun 18, 2021 | HERBOLD | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | US5041463 |
| INTERNATIONAL-SEARCH-REPORT | WO0166471 |
| INTERNATIONAL-SEARCH-REPORT | WO2007125154 |
| INTERNATIONAL-SEARCH-REPORT | WO2010000744 |
| OPPOSITION | DE4036987 |
| OPPOSITION | US4725623 |
| OPPOSITION | US5532413 |
| OPPOSITION | WO0166471 |
| OPPOSITION | WO2007125154 |
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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Jan 17, 2025
Refund of fees
Search/Exam
Jan 15, 2025
Jan 15, 2025
Jan 2, 2025
Jan 2, 2025
Jan 2, 2025
Dec 19, 2024
(Electronic) Receipt
Appeal
Dec 19, 2024
Dec 19, 2024
Dec 19, 2024
Withdrawal of an appeal
Appeal
Dec 12, 2024
Dec 12, 2024
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Nov 20, 2024
Oct 23, 2024
Oct 21, 2024
(Electronic) Receipt
Appeal
Oct 21, 2024
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(Electronic) Receipt
Appeal
Oct 15, 2024
(Electronic) Receipt
Appeal
Oct 15, 2024
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
May 7, 2024
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(Electronic) Receipt
Appeal
Jun 23, 2023
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Reply to appeal
Appeal
Feb 23, 2023
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Feb 14, 2023
(Electronic) Receipt
Appeal
Feb 14, 2023
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Claims
Appeal
Feb 14, 2023
Claims
Appeal
Feb 14, 2023
Claims
Appeal
Feb 14, 2023
Claims
Appeal
Feb 14, 2023
Claims
Appeal
Feb 14, 2023
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Appeal
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Appeal
Feb 14, 2023
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Appeal
Feb 14, 2023
Claims
Appeal
Feb 14, 2023
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Appeal
Feb 14, 2023
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Appeal
Feb 14, 2023
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Appeal
Feb 14, 2023
Claims
Appeal
Feb 14, 2023
Claims
Appeal
Feb 14, 2023
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Appeal
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Appeal
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Claims
Appeal
Feb 14, 2023
Claims
Appeal
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(Electronic) Receipt
Appeal
Dec 2, 2022
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Notice of appeal
Appeal
Dec 2, 2022
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Apr 1, 2021
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Aug 27, 2020
Decision to grant a European patent
Search/Exam
Aug 14, 2020
(Electronic) Receipt
Search/Exam
Aug 14, 2020
Filing of the translations of the claims
Search/Exam
Aug 14, 2020
French translation of claims
Search/Exam
Aug 14, 2020
German translation of the claims
Search/Exam
Aug 14, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 15, 2020
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Intention to grant (signatures)
Search/Exam
Apr 15, 2020
Text intended for grant (clean copy)
Search/Exam
Apr 15, 2020
Mar 27, 2020
Examination started
Search/Exam
Jun 11, 2019
(Electronic) Receipt
Search/Exam
Jun 11, 2019
Jun 11, 2019
Amended claims with annotations
Search/Exam
Jun 11, 2019
Amendments received before examination
Search/Exam
Jun 11, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 20, 2019
Dec 20, 2018
Dec 18, 2018
Communication to designated inventor
Search/Exam
Dec 18, 2018
Communication to designated inventor
Search/Exam
Nov 28, 2018
Nov 16, 2018
(Electronic) Receipt
Search/Exam
Nov 16, 2018
Priority search results
Search/Exam
Nov 16, 2018
Request for entry into the European phase
Search/Exam
Sep 21, 2018
Information on entry into European phase
Search/Exam
Aug 31, 2018
Notification of the recording of a change
Search/Exam
Dec 6, 2017
Nov 16, 2017
Copy of the international search report
Search/Exam
Nov 16, 2017
Published international application - A1
Search/Exam
Jul 19, 2017
ISR: cited documents
PCTISA
Jul 18, 2017
Jul 18, 2017
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Jun 30, 2017
Jun 30, 2017
Jun 15, 2017
Jun 1, 2017
Abstract
PCTISA
Jun 1, 2017
Claims
PCTISA
Jun 1, 2017
Description
PCTISA
Jun 1, 2017
Drawings
PCTISA
Jun 1, 2017