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The patent EP3690520 was granted to Carl Zeiss on Jun 12, 2024. The application was filed on Jan 30, 2019 under application number EP19154553A. 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 |
|---|---|---|---|
| RODENSTOCK | Mar 12, 2025 | 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 | WO2017US63664 |
| DESCRIPTION | US2012013846 |
| EXAMINATION | CN108333795 |
| EXAMINATION | JP2013000719 |
| EXAMINATION | US3645610 |
| OPPOSITION | AU117067B |
| OPPOSITION | AU1432288 |
| OPPOSITION | BE899997 |
| OPPOSITION | CN2098696U |
| OPPOSITION | DE10310561 |
| OPPOSITION | DE8705203U |
| OPPOSITION | EP1409198 |
| OPPOSITION | GB466620 |
| OPPOSITION | US2012013846 |
| OPPOSITION | US2018133987 |
| OPPOSITION | US2019016074 |
| OPPOSITION | US3645610 |
| OPPOSITION | US4504128 |
| OPPOSITION | US6440335 |
| OPPOSITION | US7507358 |
| OPPOSITION | US7919020 |
| OPPOSITION | US9535262 |
| OPPOSITION | US9778485 |
| SEARCH | BE899997 |
| SEARCH | US4504128 |
| SEARCH | US4561736 |
| SEARCH | US4784482 |
| SEARCH | US6440335 |
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
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May 3, 2024
(Electronic) Receipt
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May 3, 2024
French translation of claims
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May 3, 2024
German translation of the claims
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May 3, 2024
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Feb 5, 2024
Text intended for grant (clean copy)
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Feb 5, 2024
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(Electronic) Receipt
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Nov 8, 2023
Amended claims with annotations
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Nov 8, 2023
Claims
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Nov 8, 2023
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Jul 28, 2023
Text intended for grant (clean copy)
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Jul 28, 2023
Mar 14, 2022
(Electronic) Receipt
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Mar 14, 2022
Amended claims with annotations
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Mar 14, 2022
Amended description with annotations
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Mar 14, 2022
Claims
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Mar 14, 2022
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Mar 14, 2022
Letter accompanying subsequently filed items
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Mar 14, 2022
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Document concerning representation
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Feb 4, 2022
Annex to the communication
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Jun 15, 2021
(Electronic) Receipt
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Jun 15, 2021
Amended claims with annotations
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Jun 15, 2021
Claims
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Jun 15, 2021
Letter accompanying subsequently filed items
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Jun 15, 2021
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Annex to the communication
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Feb 18, 2021
Communication from the Examining Division
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Feb 12, 2021
Examination started
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Feb 3, 2021
(Electronic) Receipt
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Feb 3, 2021
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Amended claims with annotations
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Feb 3, 2021
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Amended description with annotations
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Feb 3, 2021
Amendments received before examination
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Feb 3, 2021
Letter accompanying subsequently filed items
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Aug 10, 2020
Jul 8, 2020
Notification of forthcoming publication
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Aug 5, 2019
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European search opinion
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Aug 5, 2019
European search report
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Aug 5, 2019
Information on Search Strategy
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Jul 30, 2019
Letter concerning search matters
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Jul 22, 2019
Search started
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Mar 25, 2019
Communication to designated inventor
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Mar 25, 2019
Communication to designated inventor
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Jan 30, 2019
Abstract
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Jan 30, 2019
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Claims
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Jan 30, 2019
Description
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Jan 30, 2019
Designation of inventor
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Jan 30, 2019
Drawings
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Jan 30, 2019
Request for grant of a European patent
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