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The patent EP3157737 was granted to Covestro Deutschland on Jul 18, 2018. The application was filed on Jun 22, 2015 under application number EP15730177A. 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 |
|---|---|---|---|
| EOS ELECTRO OPTICAL SYSTEMS | Apr 18, 2019 | BECKORD & NIEDLICH PATENTANWALTE PARTG MBB | ADMISSIBLE |
| HUNTSMAN | Apr 18, 2019 | HELD | ADMISSIBLE |
| LUBRIZOL ADVANCED MATERIALS | Apr 18, 2019 | BRADLEY | ADMISSIBLE |
| BASF | Apr 10, 2019 | BASF ASSOCIATION | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | DE102010061854 |
| INTERNATIONAL-SEARCH-REPORT | US8114334 |
| OPPOSITION | CA2313456 |
| OPPOSITION | DE102010061854 |
| OPPOSITION | DE2901774 |
| OPPOSITION | DE3916874 |
| OPPOSITION | DE69805773T |
| OPPOSITION | EP1068250 |
| OPPOSITION | EP1069143 |
| OPPOSITION | EP14173556 |
| OPPOSITION | EP1648686 |
| OPPOSITION | US2007132158 |
| OPPOSITION | US6110411 |
| OPPOSITION | US8114334 |
| OPPOSITION | WO2012069264 |
| OPPOSITION | WO2015197515 |
| OPPOSITION | WO9931158 |
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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Jul 30, 2018
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Decision to grant a European patent
Search/Exam
Jun 1, 2018
May 29, 2018
(Electronic) Receipt
Search/Exam
May 29, 2018
English translation of the claims
Search/Exam
May 29, 2018
Filing of the translations of the claims
Search/Exam
May 29, 2018
French translation of claims
Search/Exam
May 29, 2018
Letter accompanying subsequently filed items
Search/Exam
May 24, 2018
English translation of the claims
Search/Exam
May 24, 2018
Filing of the translations of the claims
Search/Exam
May 24, 2018
French translation of claims
Search/Exam
Jan 26, 2018
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Jan 26, 2018
Intention to grant (signatures)
Search/Exam
Jan 26, 2018
Text intended for grant (clean copy)
Search/Exam
Jan 26, 2018
Jan 4, 2018
Examination started
Search/Exam
Jul 25, 2017
(Electronic) Receipt
Search/Exam
Jul 25, 2017
Letter accompanying subsequently filed items
Search/Exam
Jul 25, 2017
Reply to Written Opinion prepared by the EPO
Search/Exam
Mar 29, 2017
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Communication to designated inventor
Search/Exam
Feb 1, 2017
Communication to designated inventor
Search/Exam
Feb 1, 2017
Communication to designated inventor
Search/Exam
Jan 28, 2017
Priority search results copy provided by EPO
Search/Exam
Jan 11, 2017
Nov 29, 2016
(Electronic) Receipt
Search/Exam
Nov 29, 2016
Annex
Search/Exam
Nov 29, 2016
Request for entry into the European phase
Search/Exam
Nov 4, 2016
Information on entry into European phase
Search/Exam
Jan 19, 2016
Priority document
Search/Exam
Dec 30, 2015
Copy of the international search report
Search/Exam
Dec 30, 2015
Copy of the international search report
Search/Exam
Dec 30, 2015
Published international application - A1
Search/Exam
Oct 27, 2015
Sep 17, 2015
ISR: cited documents
PCTISA
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Jun 22, 2015
(Electronic) Receipt
PCTRO
Jun 22, 2015
Abstract
PCTRO
Jun 22, 2015
Claims
PCTRO
Jun 22, 2015
Description
PCTRO
Jun 22, 2015