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The patent EP3471856 was granted to Donaldson on Jul 27, 2022. The application was filed on Jun 16, 2017 under application number EP17732723A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| MANN HUMMEL | Apr 27, 2023 | MAIWALD | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US20030467521 |
| DESCRIPTION | US20040543804 |
| DESCRIPTION | WO2004US07927 |
| DESCRIPTION | DE202008017059U |
| DESCRIPTION | US2004187689 |
| DESCRIPTION | US2005130508 |
| DESCRIPTION | US5613992 |
| DESCRIPTION | US5772883 |
| DESCRIPTION | US5792247 |
| DESCRIPTION | US5820646 |
| DESCRIPTION | US5895574 |
| DESCRIPTION | US5902364 |
| DESCRIPTION | US6039778 |
| DESCRIPTION | US6179890 |
| DESCRIPTION | US6190432 |
| DESCRIPTION | US6210469 |
| DESCRIPTION | US6235195 |
| DESCRIPTION | US6350296 |
| DESCRIPTION | US6673136 |
| DESCRIPTION | US7625419 |
| DESCRIPTION | USD396098S |
| DESCRIPTION | USD398046S |
| DESCRIPTION | USD399944S |
| DESCRIPTION | USD428128S |
| DESCRIPTION | USD437401S |
| DESCRIPTION | WO2004007054 |
| DESCRIPTION | WO2004082795 |
| DESCRIPTION | WO2005077487 |
| EXAMINATION | US2015306530 |
| EXAMINATION | US6235195 |
| INTERNATIONAL-SEARCH-REPORT | DE102014008704 |
| INTERNATIONAL-SEARCH-REPORT | EP1166843 |
| INTERNATIONAL-SEARCH-REPORT | JP2001329921 |
| INTERNATIONAL-SEARCH-REPORT | WO2016030037 |
| OPPOSITION | DE102014008702 |
| OPPOSITION | JP2001329921 |
| OPPOSITION | US2010258493 |
| OPPOSITION | US2015306530 |
| OPPOSITION | US6235195 |
| OPPOSITION | WO2005107924 |
| OPPOSITION | WO2009003119 |
| OPPOSITION | WO2009106590 |
| OPPOSITION | WO2012055102 |
| OPPOSITION | WO2016030037 |
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.
Date
Description
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General authorisation
Search/Exam
Nov 1, 2022
Letter accompanying subsequently filed items
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Nov 1, 2022
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Jun 30, 2022
Decision to grant a European patent
Search/Exam
May 25, 2022
May 19, 2022
(Electronic) Receipt
Search/Exam
May 19, 2022
Filing of the translations of the claims
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May 19, 2022
French translation of claims
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May 19, 2022
German translation of the claims
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May 19, 2022
Letter accompanying subsequently filed items
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Jan 27, 2022
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Intention to grant (signatures)
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Jan 27, 2022
Text intended for grant (clean copy)
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Jan 27, 2022
Aug 31, 2021
(Electronic) Receipt
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Aug 31, 2021
Amended claims with annotations
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Aug 31, 2021
Claims
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Aug 31, 2021
Letter accompanying subsequently filed items
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Aug 31, 2021
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Annex to the communication
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May 17, 2021
Communication from the Examining Division
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Mar 15, 2021
(Electronic) Receipt
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Mar 15, 2021
Amended claims with annotations
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Mar 15, 2021
Claims
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Mar 15, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 15, 2021
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Annex to the communication
Search/Exam
Nov 3, 2020
Communication from the Examining Division
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Aug 27, 2020
(Electronic) Receipt
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Aug 27, 2020
Amended claims with annotations
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Aug 27, 2020
Claims
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Aug 27, 2020
Letter accompanying subsequently filed items
Search/Exam
Aug 27, 2020
Jul 2, 2020
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Annex to the communication
Search/Exam
Apr 30, 2020
Communication from the Examining Division
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Apr 24, 2020
Examination started
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Aug 15, 2019
(Electronic) Receipt
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Aug 15, 2019
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Amended claims with annotations
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Aug 15, 2019
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Amended description with annotations
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Aug 15, 2019
Amendments received before examination
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Aug 15, 2019
Letter accompanying subsequently filed items
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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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Jan 9, 2019
(Electronic) Receipt
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Jan 9, 2019
Request for entry into the European phase
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Jan 3, 2019
Oct 26, 2018
Information on entry into European phase
Search/Exam
Jan 8, 2018
Dec 21, 2017
Copy of the international search report
Search/Exam
Dec 21, 2017
Published international application - A1
Search/Exam
Sep 15, 2017
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