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The patent EP3411436 was granted to Kuhl on Dec 28, 2022. The application was filed on Feb 1, 2017 under application number EP17703936A. 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 |
|---|---|---|---|
| MITSUBISHI CHEMICAL | Jun 18, 2020 | HOFFMANN EITLE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP0603876 |
| INTERNATIONAL-SEARCH-REPORT | GB2189789 |
| INTERNATIONAL-SEARCH-REPORT | US5349000 |
| INTERNATIONAL-SEARCH-REPORT | WO2009153275 |
| INTERNATIONAL-SEARCH-REPORT | WO2014202694 |
| INTERNATIONAL-SEARCH-REPORT | WO2015158838 |
| INTERNATIONAL-SEARCH-REPORT | WO2015177591 |
| OPPOSITION | CN102977565 |
| OPPOSITION | CN103044716 |
| OPPOSITION | DE19802718 |
| OPPOSITION | EP0157612 |
| OPPOSITION | EP0441666 |
| OPPOSITION | EP0584590 |
| OPPOSITION | EP2937386 |
| OPPOSITION | JP2001049100 |
| OPPOSITION | JP2001072822 |
| OPPOSITION | JP2005015814 |
| OPPOSITION | JPH05125266 |
| OPPOSITION | JPH06263954 |
| OPPOSITION | US2002128384 |
| OPPOSITION | US2013131224 |
| OPPOSITION | US4261473 |
| OPPOSITION | US5393804 |
| OPPOSITION | WO02078455 |
| OPPOSITION | WO2007118280 |
| OPPOSITION | WO2012124129 |
| OPPOSITION | WO9216583 |
| OPPOSITION | WO9320140 |
| OTHER | EP2937386 |
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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Decision to grant a European patent
Search/Exam
Aug 8, 2019
Jul 26, 2019
(Electronic) Receipt
Search/Exam
Jul 26, 2019
English translation of the claims
Search/Exam
Jul 26, 2019
French translation of claims
Search/Exam
Jul 26, 2019
Letter accompanying subsequently filed items
Search/Exam
Jul 26, 2019
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Intention to grant (signatures)
Search/Exam
Jul 10, 2019
Text intended for grant (clean copy)
Search/Exam
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Non-patent literature filed by a third party
Search/Exam
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Observations by third parties
Search/Exam
Jul 8, 2019
Patent document filed by a Third party
Search/Exam
Mar 12, 2019
(Electronic) Receipt
Search/Exam
Mar 12, 2019
Amended claims with annotations
Search/Exam
Mar 12, 2019
Claims
Search/Exam
Mar 12, 2019
Letter accompanying subsequently filed items
Search/Exam
Mar 12, 2019
Feb 18, 2019
Annex to the communication
Search/Exam
Feb 18, 2019
Communication from the Examining Division
Search/Exam
Feb 7, 2019
Examination started
Search/Exam
Jan 18, 2019
Jan 7, 2019
(Electronic) Receipt
Search/Exam
Jan 7, 2019
Enquiry as to the processing of the file
Search/Exam
Jan 7, 2019
Letter accompanying subsequently filed items
Search/Exam
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Jun 15, 2018
Information on entry into European phase
Search/Exam
Jun 14, 2018
(Electronic) Receipt
Search/Exam
Jun 14, 2018
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Amended claims with annotations
Search/Exam
Jun 14, 2018
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Amended description with annotations
Search/Exam
Jun 14, 2018
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Priority search results
Search/Exam
Jun 14, 2018
Reply to Written Opinion prepared by the EPO
Search/Exam
Jun 14, 2018
Request for entry into the European phase
Search/Exam
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Free text
PCT2
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Written opinion
PCT2
Jan 11, 2018
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Aug 15, 2017
Notification of election of EPO
Search/Exam
Aug 10, 2017
Copy of the international search report
Search/Exam
Aug 10, 2017
Copy of the international search report
Search/Exam
Aug 10, 2017
Published international application - A1
Search/Exam
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PCT demand form
PCT2
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(Electronic) Receipt
PCTRO
Feb 1, 2017
Abstract
PCTRO
Feb 1, 2017
Claims
PCTRO
Feb 1, 2017
Description
PCTRO
Feb 1, 2017
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