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The patent EP3542211 was granted to Carl Zeiss on Sep 3, 2025. The application was filed on Dec 20, 2017 under application number EP17818146A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| RODENSTOCK | Jan 11, 2021 | MULLER BORE & PARTNER PATENTANWALTE PARTG MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102011115239 |
| DESCRIPTION | WO0184222 |
| INTERNATIONAL-SEARCH-REPORT | DE102009004383 |
| INTERNATIONAL-SEARCH-REPORT | DE102011115239 |
| INTERNATIONAL-SEARCH-REPORT | DE102014013447 |
| INTERNATIONAL-SEARCH-REPORT | US2016246078 |
| INTERNATIONAL-SEARCH-REPORT | US2016299360 |
| INTERNATIONAL-SEARCH-REPORT | US4852184 |
| INTERNATIONAL-SEARCH-REPORT | WO2014198888 |
| OPPOSITION | DE102009004383 |
| OPPOSITION | DE102011115239 |
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.
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Description
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Appeal
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Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
Feb 26, 2020
(Electronic) Receipt
Search/Exam
Feb 26, 2020
English translation of the claims
Search/Exam
Feb 26, 2020
Filing of the translations of the claims
Search/Exam
Feb 26, 2020
French translation of claims
Search/Exam
Feb 26, 2020
Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
Jan 9, 2020
Text intended for grant (clean copy)
Search/Exam
Jan 9, 2020
Dec 11, 2019
(Electronic) Receipt
Search/Exam
Dec 11, 2019
Amended claims with annotations
Search/Exam
Dec 11, 2019
Claims
Search/Exam
Dec 11, 2019
Letter accompanying subsequently filed items
Search/Exam
Dec 11, 2019
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Annex to the communication
Search/Exam
Oct 11, 2019
Consultation by telephone/in person
Search/Exam
Oct 11, 2019
Oct 9, 2019
Examination started
Search/Exam
Sep 2, 2019
Communication to designated inventor
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Letter concerning the inventor
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Aug 12, 2019
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Letter which had not been notified
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Jul 12, 2019
Matter concerning the application
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Jul 4, 2019
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Communication to designated inventor
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Jul 3, 2019
Communication to designated inventor
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Jul 2, 2019
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Priority search results copy provided by EPO
Search/Exam
Jun 21, 2019
(Electronic) Receipt
Search/Exam
Jun 21, 2019
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Amended claims with annotations
Search/Exam
Jun 21, 2019
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Amended description with annotations
Search/Exam
Jun 21, 2019
Amendments received before examination
Search/Exam
Jun 21, 2019
Annex
Search/Exam
Jun 21, 2019
Request for entry into the European phase
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Jun 7, 2019
Information on entry into European phase
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Notification of election of EPO
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Aug 2, 2018
Copy of the international search report
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Aug 2, 2018
Copy of the international search report
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Aug 2, 2018
Published international application - A1
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PCT demand form
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ISR: cited documents
PCTISA
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(Electronic) Receipt
PCTRO
Dec 20, 2017
Abstract
PCTRO
Dec 20, 2017
Claims
PCTRO
Dec 20, 2017
Description
PCTRO
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Drawings
PCTRO
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