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The patent EP3312661 was granted to Carl Zeiss on Jan 25, 2023. The application was filed on Oct 21, 2016 under application number EP16195139A. 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 |
|---|---|---|---|
| ESSILOR | Oct 8, 2020 | SANTARELLI | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE19848591 |
| DESCRIPTION | DE69534779T |
| DESCRIPTION | EP0182503 |
| DESCRIPTION | EP2578649 |
| DESCRIPTION | EP2664659 |
| DESCRIPTION | JP2008191186 |
| DESCRIPTION | WO2006050891 |
| DESCRIPTION | WO2015121341 |
| EXAMINATION | US2003003295 |
| EXAMINATION | US2003143391 |
| EXAMINATION | US5343260 |
| OPPOSITION | EP0028974 |
| OPPOSITION | EP0028975 |
| OPPOSITION | FR2687482 |
| OPPOSITION | US399853 |
| OPPOSITION | WO2006029268 |
| OPPOSITION | WO2015004383 |
| OPPOSITION | WO2016094706 |
| SEARCH | DE102009004377 |
| SEARCH | EP0028974 |
| SEARCH | EP0028975 |
| SEARCH | EP1918760 |
| SEARCH | EP2878989 |
| SEARCH | US2005046957 |
| SEARCH | US2007076167 |
| SEARCH | US2015276987 |
| SEARCH | US2016161761 |
| SEARCH | US3998531 |
| SEARCH | US4679918 |
| SEARCH | US6079827 |
| SEARCH | WO2016094706 |
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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Decision to grant a European patent
Search/Exam
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Intention to grant (signatures)
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Oct 31, 2019
Text intended for grant (clean copy)
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English translation of the claims
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French translation of claims
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Intention to grant (signatures)
Search/Exam
May 9, 2019
Text intended for grant (clean copy)
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(Electronic) Receipt
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Feb 20, 2019
Amended claims with annotations
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Amended description with annotations
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Claims
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Feb 20, 2019
Description
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Letter accompanying subsequently filed items
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Feb 12, 2019
Annex to the communication
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Feb 12, 2019
Consultation by telephone/in person
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Feb 12, 2019
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(Electronic) Receipt
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Feb 4, 2019
Amended claims with annotations
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Feb 4, 2019
Amended description with annotations
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Feb 4, 2019
Claims
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Description
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Letter accompanying subsequently filed items
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Feb 4, 2019
Dec 11, 2018
Annex to the communication
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Dec 11, 2018
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Examination started
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Oct 23, 2018
(Electronic) Receipt
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Oct 23, 2018
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Amended claims with annotations
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Amended description with annotations
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Oct 23, 2018
Amendments received before examination
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Oct 23, 2018
Letter accompanying subsequently filed items
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May 2, 2018
Mar 28, 2018
Notification of forthcoming publication
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Jul 14, 2017
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Jul 3, 2017
Designation of inventor
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Jul 3, 2017
Letter concerning the inventor
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European search opinion
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Apr 13, 2017
European search report
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Apr 13, 2017
Information on Search Strategy
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Mar 21, 2017
Search started
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Nov 18, 2016
Deficiency in designation of inventor
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Oct 21, 2016
Abstract
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Oct 21, 2016
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Claims
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Oct 21, 2016
Description
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Oct 21, 2016
Drawings
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Oct 21, 2016
Request for grant of a European patent
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