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The patent EP3555039 was granted to Josef Meissner on Aug 5, 2020. The application was filed on Dec 14, 2017 under application number EP17828680A. 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.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| COVESTRO DEUTSCHLAND COVESTRO | May 4, 2021 | LEVPAT | ADMISSIBLE |
| NORAM | May 4, 2021 | EISENFUHR SPEISER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0005203 |
| DESCRIPTION | EP0373966 |
| DESCRIPTION | EP0436443 |
| DESCRIPTION | EP0489211 |
| DESCRIPTION | EP0708076 |
| DESCRIPTION | EP0771783 |
| DESCRIPTION | EP0779270 |
| DESCRIPTION | EP0953546 |
| DESCRIPTION | EP1272268 |
| DESCRIPTION | EP1272269 |
| DESCRIPTION | EP1291078 |
| DESCRIPTION | EP1816117 |
| DESCRIPTION | EP2168942 |
| DESCRIPTION | EP2354117 |
| DESCRIPTION | EP2473477 |
| DESCRIPTION | EP2877442 |
| DESCRIPTION | US4091042 |
| DESCRIPTION | US4482769 |
| DESCRIPTION | US4597875 |
| DESCRIPTION | US6288289 |
| DESCRIPTION | US8692035 |
| DESCRIPTION | US9284256 |
| DESCRIPTION | WO2010051616 |
| INTERNATIONAL-SEARCH-REPORT | DE1468575 |
| INTERNATIONAL-SEARCH-REPORT | EP0373966 |
| INTERNATIONAL-SEARCH-REPORT | EP2877442 |
| OPPOSITION | DE102008048713 |
| OPPOSITION | DE1468575 |
| OPPOSITION | EP0156199 |
| OPPOSITION | EP0373966 |
| OPPOSITION | EP0597361 |
| OPPOSITION | EP0708076 |
| OPPOSITION | EP0779270 |
| OPPOSITION | EP0976718 |
| OPPOSITION | EP1272268 |
| OPPOSITION | EP1291078 |
| OPPOSITION | EP2719682 |
| OPPOSITION | EP2877443 |
| OPPOSITION | JPH09235253 |
| OPPOSITION | JPS5759837 |
| OPPOSITION | US2256999 |
| OPPOSITION | US4091042 |
| OPPOSITION | US4241229 |
| OPPOSITION | US5313009 |
| OPPOSITION | US7763759 |
| OPPOSITION | US9139509 |
| OPPOSITION | WO2012110839 |
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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Aug 17, 2020
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Decision to grant a European patent
Search/Exam
Jul 8, 2020
Refund of fees
Search/Exam
Jun 29, 2020
(Electronic) Receipt
Search/Exam
Jun 29, 2020
English translation of the claims
Search/Exam
Jun 29, 2020
Filing of the translations of the claims
Search/Exam
Jun 29, 2020
French translation of claims
Search/Exam
Jun 29, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 26, 2020
(Electronic) Receipt
Search/Exam
Jun 26, 2020
Filing of the translations of the claims
Search/Exam
Jun 26, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 26, 2020
Translation of the claims
Search/Exam
Jun 26, 2020
Translation of the claims
Search/Exam
May 29, 2020
May 29, 2020
May 29, 2020
Intention to grant (signatures)
Search/Exam
May 29, 2020
Text intended for grant (clean copy)
Search/Exam
May 29, 2020
May 27, 2020
(Electronic) Receipt
Search/Exam
May 27, 2020
Enquiry as to the processing of the file
Search/Exam
May 27, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 17, 2020
Examination started
Search/Exam
Mar 24, 2020
(Electronic) Receipt
Search/Exam
Mar 24, 2020
Letter accompanying subsequently filed items
Search/Exam
Mar 24, 2020
Priority search results
Search/Exam
Mar 24, 2020
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(Electronic) Receipt
Search/Exam
Jan 7, 2020
Jan 7, 2020
Amended description with annotations
Search/Exam
Jan 7, 2020
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Search/Exam
Jan 7, 2020
Letter accompanying subsequently filed items
Search/Exam
Sep 25, 2019
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Communication to designated inventor
Search/Exam
Aug 27, 2019
Letter concerning the inventor
Search/Exam
Aug 22, 2019
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Letter which had not been notified
Search/Exam
Aug 12, 2019
Aug 12, 2019
Aug 2, 2019
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Jul 30, 2019
Communication to designated inventor
Search/Exam
Jul 30, 2019
Communication to designated inventor
Search/Exam
Jul 30, 2019
Communication to designated inventor
Search/Exam
Jul 30, 2019
Communication to designated inventor
Search/Exam
Jul 30, 2019
Communication to designated inventor
Search/Exam
Jul 17, 2019
(Electronic) Receipt
Search/Exam
Jul 17, 2019
Jul 17, 2019
Amended claims with annotations
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Jul 17, 2019
Request for entry into the European phase
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Jun 14, 2019
Information on entry into European phase
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Dec 21, 2018
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Aug 15, 2018
Notification of election of EPO
Search/Exam
Aug 9, 2018
Copy of the international search report
Search/Exam
Aug 9, 2018
Copy of the international search report
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Aug 9, 2018
Published international application - A1
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Apr 6, 2018
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PCT demand form
PCT2
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(Electronic) Receipt
PCTRO
Dec 14, 2017
Abstract
PCTRO
Dec 14, 2017
Claims
PCTRO
Dec 14, 2017
Description
PCTRO
Dec 14, 2017
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Drawings
PCTRO
Dec 14, 2017