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The patent EP3571554 was granted to Donaldson Filtration Deutschland on Dec 9, 2020. The application was filed on Jan 22, 2018 under application number EP18701161A. 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 |
|---|---|---|---|
| KAESER KOMPRESSOREN | Sep 9, 2021 | WITTE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP2591827 |
| OPPOSITION | EP3076093 |
| OPPOSITION | US2014262130 |
| OPPOSITION | US2015235545 |
| OPPOSITION | US2016052798 |
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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Appeal
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Appeal
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Appeal
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Appeal
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(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Mar 8, 2023
Notice of appeal
Appeal
Mar 1, 2023
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Appeal
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Decision to grant a European patent
Search/Exam
Oct 28, 2020
(Electronic) Receipt
Search/Exam
Oct 28, 2020
Filing of the translations of the claims
Search/Exam
Oct 28, 2020
French translation of claims
Search/Exam
Oct 28, 2020
German translation of the claims
Search/Exam
Oct 28, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 18, 2020
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Intention to grant (signatures)
Search/Exam
Jun 18, 2020
Text intended for grant (clean copy)
Search/Exam
Jun 18, 2020
May 28, 2020
Examination started
Search/Exam
May 5, 2020
(Electronic) Receipt
Search/Exam
May 5, 2020
Letter accompanying subsequently filed items
Search/Exam
May 5, 2020
Priority search results
Search/Exam
May 5, 2020
Apr 17, 2020
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(Electronic) Receipt
Search/Exam
Mar 5, 2020
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Amended claims with annotations
Search/Exam
Mar 5, 2020
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Amended description with annotations
Search/Exam
Mar 5, 2020
Amendments received before examination
Search/Exam
Mar 5, 2020
Letter accompanying subsequently filed items
Search/Exam
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Communication to designated inventor
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Aug 28, 2019
Communication to designated inventor
Search/Exam
Aug 20, 2019
(Electronic) Receipt
Search/Exam
Aug 20, 2019
Request for entry into the European phase
Search/Exam
Aug 7, 2019
Jun 3, 2019
Information on entry into European phase
Search/Exam
Aug 16, 2018
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Copy of the international search report
Search/Exam
Jul 26, 2018
Published international application - A1
Search/Exam
Apr 16, 2018
ISR: cited documents
PCTISA
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(Electronic) Receipt
PCTRO
Jan 22, 2018
Abstract
PCTRO
Jan 22, 2018
Claims
PCTRO
Jan 22, 2018
Description
PCTRO
Jan 22, 2018
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Drawings
PCTRO
Jan 22, 2018