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The patent EP3733793 was granted to KAO on Feb 26, 2025. The application was originally filed on Dec 20, 2018 under application number EP18894113A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2003055590 |
| DESCRIPTION | JP2012201710 |
| INTERNATIONAL-SEARCH-REPORT | JP2003055590 |
| INTERNATIONAL-SEARCH-REPORT | JP2007187890 |
| INTERNATIONAL-SEARCH-REPORT | JP2014056079 |
| INTERNATIONAL-SEARCH-REPORT | JP2016121237 |
| INTERNATIONAL-SEARCH-REPORT | JP2016124969 |
| INTERNATIONAL-SEARCH-REPORT | JP2016166326 |
| INTERNATIONAL-SEARCH-REPORT | WO03081298 |
| OPPOSITION | EP3447098 |
| OPPOSITION | EP3699243 |
| OPPOSITION | JP2003055590 |
| OPPOSITION | JP2012201710 |
| OPPOSITION | US2010189967 |
| OPPOSITION | WO2010104210 |
| SEARCH | JP2005202385 |
| SEARCH | WO2005105931 |
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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Mar 30, 2023
(Electronic) Receipt
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Mar 30, 2023
Filing of the translations of the claims
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Mar 30, 2023
French translation of claims
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Mar 30, 2023
German translation of the claims
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Mar 30, 2023
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Jan 10, 2023
Text intended for grant (clean copy)
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Dec 19, 2022
Examination started
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Jul 12, 2022
(Electronic) Receipt
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Amended claims with annotations
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Amended description with annotations
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Amendments received before examination
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Jul 12, 2022
Letter accompanying subsequently filed items
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European search opinion
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Dec 7, 2021
Information on Search Strategy
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Dec 7, 2021
Supplementary European search report
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Sep 6, 2021
(Electronic) Receipt
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Sep 6, 2021
Letter accompanying subsequently filed items
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Sep 6, 2021
Letter concerning search matters
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Information on Search Strategy
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Sep 2, 2021
Partial European search report
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Sep 2, 2021
Oct 7, 2020
Notification of forthcoming publication
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Jul 31, 2020
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Information regarding early processing
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May 8, 2020
Information on entry into European phase
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May 7, 2020
(Electronic) Receipt
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May 7, 2020
Abstract
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May 7, 2020
Claims
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May 7, 2020
Description
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May 7, 2020
Drawings
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May 7, 2020
Request for entry into the European phase
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Copy of the international search report
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International publication pamphlet
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