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The patent EP3451898 was granted to Alcon on Jun 21, 2023. The application was filed on May 2, 2016 under application number EP16723532A. 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 |
|---|---|---|---|
| WEICKMANN & WEICKMANN | Mar 21, 2024 | WEICKMANN & WEICKMANN PARTMBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | DE102010046500 |
| INTERNATIONAL-SEARCH-REPORT | EP1800636 |
| INTERNATIONAL-SEARCH-REPORT | US2007055222 |
| INTERNATIONAL-SEARCH-REPORT | WO2015043616 |
| INTERNATIONAL-SEARCH-REPORT | WO2016061454 |
| OPPOSITION | DE102010046500 |
| OPPOSITION | EP1800636 |
| OPPOSITION | US2003223037 |
| OPPOSITION | US2007055222 |
| OPPOSITION | US2007142826 |
| OPPOSITION | US2010094262 |
| OPPOSITION | US2014125949 |
| OPPOSITION | US8231221 |
| OPPOSITION | US8556885 |
| OPPOSITION | WO0128476 |
| OPPOSITION | WO0178584 |
| OPPOSITION | WO02087442 |
| OPPOSITION | WO03053228 |
| OPPOSITION | WO03102498 |
| OPPOSITION | WO2004089214 |
| OPPOSITION | WO2011035063 |
| OPPOSITION | WO2012040196 |
| OPPOSITION | WO2014172621 |
| OPPOSITION | WO2015043616 |
| OPPOSITION | WO2016061454 |
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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Nov 27, 2025
Nov 24, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
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Notice of appeal
Appeal
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Annexes in respect of a client data request
Search/Exam
Jun 30, 2023
Letter accompanying subsequently filed items
Search/Exam
Jun 30, 2023
May 25, 2023
Decision to grant a European patent
Search/Exam
May 10, 2023
(Electronic) Receipt
Search/Exam
May 10, 2023
Filing of the translations of the claims
Search/Exam
May 10, 2023
French translation of claims
Search/Exam
May 10, 2023
German translation of the claims
Search/Exam
Feb 7, 2023
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Intention to grant (signatures)
Search/Exam
Feb 7, 2023
Text intended for grant (clean copy)
Search/Exam
Feb 7, 2023
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(Electronic) Receipt
Search/Exam
Sep 13, 2021
Amended claims with annotations
Search/Exam
Sep 13, 2021
Claims
Search/Exam
Sep 13, 2021
Letter accompanying subsequently filed items
Search/Exam
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Annex to the communication
Search/Exam
Jun 16, 2021
Communication from the Examining Division
Search/Exam
Jun 9, 2021
Examination started
Search/Exam
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(Electronic) Receipt
Search/Exam
Dec 19, 2019
Letter accompanying subsequently filed items
Search/Exam
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(Electronic) Receipt
Search/Exam
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Amended claims with annotations
Search/Exam
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Amended description with annotations
Search/Exam
Jun 26, 2019
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Search/Exam
Jun 26, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 13, 2019
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Refund of fees
Search/Exam
Dec 18, 2018
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Communication to designated inventor
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Communication to designated inventor
Search/Exam
Dec 7, 2018
Communication to designated inventor
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Nov 27, 2018
(Electronic) Receipt
Search/Exam
Nov 27, 2018
Request for entry into the European phase
Search/Exam
Nov 21, 2018
Sep 14, 2018
Information on entry into European phase
Search/Exam
Nov 9, 2017
Copy of the international search report
Search/Exam
Nov 9, 2017
Published international application - A1
Search/Exam
Feb 13, 2017
ISR: cited documents
PCTISA
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Annex
PCTISA
May 31, 2016
May 10, 2016
Abstract
PCTISA
May 10, 2016
Claims
PCTISA
May 10, 2016
Description
PCTISA
May 10, 2016
Drawings
PCTISA
May 10, 2016