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The patent EP3371367 was granted to Covestro Netherlands on Mar 29, 2023. The application was filed on Nov 4, 2016 under application number EP16794261A. 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 |
|---|---|---|---|
| LOW & BONAR | Sep 23, 2020 | CPW | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE4122993 |
| DESCRIPTION | EP1598476 |
| DESCRIPTION | EP1892331 |
| DESCRIPTION | EP1892332 |
| DESCRIPTION | US4624878 |
| DESCRIPTION | WO2012076348 |
| INTERNATIONAL-SEARCH-REPORT | US2002132084 |
| INTERNATIONAL-SEARCH-REPORT | US2011013176 |
| INTERNATIONAL-SEARCH-REPORT | US4910062 |
| OPPOSITION | DE69301114T |
| OPPOSITION | EP0093207 |
| OPPOSITION | EP0864262 |
| OPPOSITION | FR2451415 |
| OPPOSITION | US2224370 |
| OPPOSITION | US4910062 |
| OPPOSITION | WO9207987 |
| OPPOSITION | WO9830383 |
| OTHER | EP0093207 |
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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Decision to grant a European patent
Search/Exam
Nov 4, 2019
(Electronic) Receipt
Search/Exam
Nov 4, 2019
Filing of the translations of the claims
Search/Exam
Nov 4, 2019
French translation of claims
Search/Exam
Nov 4, 2019
German translation of the claims
Search/Exam
Nov 4, 2019
Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
Jun 27, 2019
Text intended for grant (clean copy)
Search/Exam
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Examination started
Search/Exam
Jan 4, 2019
Refund of fees
Search/Exam
Dec 14, 2018
(Electronic) Receipt
Search/Exam
Dec 14, 2018
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Amended claims with annotations
Search/Exam
Dec 14, 2018
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Amended description with annotations
Search/Exam
Dec 14, 2018
Amendments received before examination
Search/Exam
Dec 14, 2018
Letter accompanying subsequently filed items
Search/Exam
Aug 16, 2018
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
Search/Exam
Jun 5, 2018
Priority search results copy provided by EPO
Search/Exam
May 23, 2018
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(Electronic) Receipt
Search/Exam
May 4, 2018
Request for entry into the European phase
Search/Exam
Mar 16, 2018
Information on entry into European phase
Search/Exam
May 31, 2017
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Copy of the international search report
Search/Exam
May 11, 2017
Published international application - A1
Search/Exam
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(Electronic) Receipt
PCTRO
Nov 4, 2016
Abstract
PCTRO
Nov 4, 2016
Claims
PCTRO
Nov 4, 2016
Description
PCTRO
Nov 4, 2016
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Drawings
PCTRO
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