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The patent EP3396269 was granted to Blueair on Apr 19, 2023. The application was filed on Apr 10, 2018 under application number EP18166439A. 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 |
|---|---|---|---|
| ALTHOFF | Oct 28, 2020 | SCHNEIDERS & BEHRENDT BOCHUM | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | EP0006274 |
| OPPOSITION | EP1538290 |
| OPPOSITION | EP1847309 |
| OPPOSITION | JP2005007361 |
| OPPOSITION | JP2013176749 |
| OPPOSITION | US4123822 |
| OPPOSITION | US5220951 |
| OPPOSITION | US8763206 |
| OPPOSITION | WO2017026761 |
| SEARCH | EP1847309 |
| SEARCH | US2015265957 |
| SEARCH | US2015267927 |
| SEARCH | US3818948 |
| SEARCH | US7410520 |
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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Document concerning representation
Search/Exam
Feb 10, 2020
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Decision to grant a European patent
Search/Exam
Dec 16, 2019
(Electronic) Receipt
Search/Exam
Dec 16, 2019
Filing of the translations of the claims
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Dec 16, 2019
French translation of claims
Search/Exam
Dec 16, 2019
German translation of the claims
Search/Exam
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Examination started
Search/Exam
Apr 4, 2019
(Electronic) Receipt
Search/Exam
Apr 4, 2019
Letter concerning fees and payments
Search/Exam
Feb 20, 2019
(Electronic) Receipt
Search/Exam
Feb 20, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 20, 2019
Letter concerning the inventor
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(Electronic) Receipt
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Dec 6, 2018
Letter accompanying subsequently filed items
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Notification of forthcoming publication
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European search opinion
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Sep 21, 2018
European search report
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Sep 21, 2018
Information on Search Strategy
Search/Exam
Sep 4, 2018
Search started
Search/Exam
Jun 4, 2018
Communication to designated inventor
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Jun 4, 2018
Communication to designated inventor
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May 17, 2018
Submission concerning representation
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Apr 13, 2018
Letter concerning the priority
Search/Exam
Apr 13, 2018
Priority document
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Priority document
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Apr 10, 2018
Abstract
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Apr 10, 2018
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Claims
Search/Exam
Apr 10, 2018
Description
Search/Exam
Apr 10, 2018
Designation of inventor
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Apr 10, 2018
Drawings
Search/Exam
Apr 10, 2018
Priority search results
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Apr 10, 2018
Priority search results
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Apr 10, 2018
Request for grant of a European patent
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