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The patent EP3166397 was granted to Lhoist Recherche ET Dveloppement on Jan 25, 2023. The application was filed on Jul 10, 2015 under application number EP15736275A. 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 |
|---|---|---|---|
| SCHAEFER KALK | Jul 7, 2021 | MAI BESIER | ADMISSIBLE |
| CARMEUSE RESEARCH AND TECHNOLOGY | Jul 6, 2021 | AWA BENELUX | ADMISSIBLE |
| FELS VERTRIEBS UND SERVICE | Jul 6, 2021 | MAIKOWSKI & NINNEMANN PATENTANWALTE PARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | GB1585483 |
| DESCRIPTION | WO9802391 |
| INTERNATIONAL-SEARCH-REPORT | DE3925474 |
| INTERNATIONAL-SEARCH-REPORT | EP0013935 |
| INTERNATIONAL-SEARCH-REPORT | EP0085939 |
| INTERNATIONAL-SEARCH-REPORT | GB1585483 |
| INTERNATIONAL-SEARCH-REPORT | GB593648 |
| INTERNATIONAL-SEARCH-REPORT | WO9802391 |
| OPPOSITION | CA226115 |
| OPPOSITION | CS202642 |
| OPPOSITION | DE1185525 |
| OPPOSITION | DE202004019019U |
| OPPOSITION | DE3925474 |
| OPPOSITION | EP0013935 |
| OPPOSITION | EP0085939 |
| OPPOSITION | GB1585483 |
| OPPOSITION | GB593648 |
| OPPOSITION | GB976085 |
| OPPOSITION | JPH0948614 |
| OPPOSITION | KR20130002777 |
| OPPOSITION | US3106453 |
| OPPOSITION | US7691190 |
| OPPOSITION | US8013204 |
| OPPOSITION | WO2009121635 |
| OPPOSITION | WO9802391 |
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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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Oct 21, 2025
Authorisation
Appeal
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(Electronic) Receipt
Appeal
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Dec 17, 2024
Refund of fees
Appeal
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Withdrawal of an appeal
Appeal
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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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Notice of appeal
Appeal
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(Electronic) Receipt
Appeal
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Notice of appeal
Appeal
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Search/Exam
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Sep 10, 2020
Decision to grant a European patent
Search/Exam
Sep 7, 2020
Change to the inventor details
Search/Exam
Aug 31, 2020
(Electronic) Receipt
Search/Exam
Aug 31, 2020
English translation of the claims
Search/Exam
Aug 31, 2020
Filing of the translations of the claims
Search/Exam
Aug 31, 2020
German translation of the claims
Search/Exam
Aug 31, 2020
Letter accompanying subsequently filed items
Search/Exam
May 4, 2020
May 4, 2020
May 4, 2020
Intention to grant (signatures)
Search/Exam
May 4, 2020
Text intended for grant (clean copy)
Search/Exam
May 4, 2020
Dec 30, 2019
(Electronic) Receipt
Search/Exam
Dec 30, 2019
Amended claims with annotations
Search/Exam
Dec 30, 2019
Claims
Search/Exam
Dec 30, 2019
Letter accompanying subsequently filed items
Search/Exam
Dec 30, 2019
Oct 30, 2019
Oct 25, 2019
(Electronic) Receipt
Search/Exam
Oct 25, 2019
Letter accompanying subsequently filed items
Search/Exam
Oct 25, 2019
Jun 25, 2019
Annex to the communication
Search/Exam
Jun 25, 2019
Communication from the Examining Division
Search/Exam
Jun 18, 2019
Examination started
Search/Exam
Aug 24, 2017
(Electronic) Receipt
Search/Exam
Aug 24, 2017
Aug 24, 2017
Amended claims with annotations
Search/Exam
Aug 24, 2017
Amendments received before examination
Search/Exam
Aug 24, 2017
Letter accompanying subsequently filed items
Search/Exam
Apr 20, 2017
Feb 21, 2017
Feb 15, 2017
Communication to designated inventor
Search/Exam
Feb 15, 2017
Communication to designated inventor
Search/Exam
Feb 15, 2017
Communication to designated inventor
Search/Exam
Feb 15, 2017
Communication to designated inventor
Search/Exam
Feb 14, 2017
Priority search results copy provided by EPO
Search/Exam
Feb 14, 2017
Priority search results copy provided by EPO
Search/Exam
Jan 23, 2017
Jan 11, 2017
Information regarding early processing
Search/Exam
Nov 29, 2016
(Electronic) Receipt
Search/Exam
Nov 29, 2016
Nov 29, 2016
Request for entry into the European phase
Search/Exam
Nov 18, 2016
Information on entry into European phase
Search/Exam
Feb 1, 2016
Feb 1, 2016
Jan 14, 2016
Copy of the international search report
Search/Exam
Jan 14, 2016
Copy of the international search report
Search/Exam
Sep 11, 2015
Sep 11, 2015
Sep 11, 2015
Aug 28, 2015
Jul 10, 2015
(Electronic) Receipt
PCTRO
Jul 10, 2015
Abstract
PCTRO
Jul 10, 2015
Claims
PCTRO
Jul 10, 2015
Description
PCTRO