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The patent EP3119730 was granted to Carbicrete on Apr 29, 2020. The application was filed on Mar 23, 2015 under application number EP15765421A. 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 |
|---|---|---|---|
| CARBSTONE INNOVATION | Jan 29, 2021 | GEVERS PATENTS | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | WO2009133120 |
| EXAMINATION | WO2013060870 |
| INTERNATIONAL-SEARCH-REPORT | CA2809225 |
| INTERNATIONAL-SEARCH-REPORT | US2008282936 |
| INTERNATIONAL-SEARCH-REPORT | WO2011134025 |
| OPPOSITION | JP2010095443 |
| OPPOSITION | US3149986 |
| OPPOSITION | US4362679 |
| OPPOSITION | WO2009133120 |
| SEARCH | CN101649663 |
| SEARCH | EP2484651 |
| SEARCH | JP2000350977 |
| SEARCH | JP2003002726 |
| SEARCH | JP2004292244 |
| SEARCH | US6334885 |
| SEARCH | US7141112 |
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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Dec 19, 2025
Dec 19, 2025
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Sep 8, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Reply to appeal
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Jan 30, 2025
Notice of appeal
Appeal
Jan 30, 2025
Notice of appeal
Appeal
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(Electronic) Receipt
Search/Exam
Apr 29, 2020
Annexes in respect of a client data request
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Apr 29, 2020
Letter accompanying subsequently filed items
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Apr 29, 2020
Apr 2, 2020
Decision to grant a European patent
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Feb 27, 2020
(Electronic) Receipt
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Feb 27, 2020
Filing of the translations of the claims
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Feb 27, 2020
French translation of claims
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Feb 27, 2020
German translation of the claims
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Feb 27, 2020
Letter accompanying subsequently filed items
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Nov 21, 2019
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Intention to grant (signatures)
Search/Exam
Nov 21, 2019
Text intended for grant (clean copy)
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Nov 21, 2019
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Advice of delivery
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Oct 28, 2019
Advice of delivery
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Oct 21, 2019
(Electronic) Receipt
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Oct 21, 2019
Amended description with annotations
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Oct 21, 2019
Annex to the communication
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Oct 21, 2019
Description
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Oct 21, 2019
Letter accompanying subsequently filed items
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Oct 21, 2019
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Annex to the communication
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Oct 16, 2019
Consultation by telephone/in person
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Oct 16, 2019
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(Electronic) Receipt
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Oct 3, 2019
Amended claims with annotations
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Oct 3, 2019
Amended claims with annotations
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Amended claims with annotations
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Oct 3, 2019
Claims
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Oct 3, 2019
Letter accompanying subsequently filed items
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Oct 3, 2019
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Advice of delivery
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May 24, 2019
Advice of delivery
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May 15, 2019
Acknowledgement of a document
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May 15, 2019
Annex to a communication
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May 15, 2019
Annex to the communication
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May 15, 2019
Summons to attend oral proceedings
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Mar 22, 2019
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Observations by third parties
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Dec 27, 2018
(Electronic) Receipt
Search/Exam
Dec 27, 2018
Amended claims with annotations
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Dec 27, 2018
Claims
Search/Exam
Dec 27, 2018
Letter accompanying subsequently filed items
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Dec 27, 2018
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Annex to the communication
Search/Exam
Aug 21, 2018
Communication from the Examining Division
Search/Exam
Aug 14, 2018
Examination started
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Jun 11, 2018
May 29, 2018
Citation filed by a third party
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May 29, 2018
Citation filed by a third party
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May 29, 2018
Observations by third parties
Search/Exam
Oct 3, 2017
(Electronic) Receipt
Search/Exam
Oct 3, 2017
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Amended claims with annotations
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Oct 3, 2017
Amendments received before examination
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Oct 3, 2017
Letter accompanying subsequently filed items
Search/Exam
Mar 24, 2017
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European search opinion
Search/Exam
Mar 8, 2017
Information on Search Strategy
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Mar 8, 2017
Supplementary European search report
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Feb 20, 2017
Search started
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Jan 4, 2017
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Communication to designated inventor
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Nov 3, 2016
Communication to designated inventor
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Nov 3, 2016
Communication to designated inventor
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Oct 18, 2016
(Electronic) Receipt
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Oct 18, 2016
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Amended claims with annotations
Search/Exam
Oct 18, 2016
Amendments received before examination
Search/Exam
Oct 18, 2016
Request for entry into the European phase
Search/Exam
Oct 6, 2016
Jul 29, 2016
Information on entry into European phase
Search/Exam
May 3, 2016
Notification of the recording of a change
Search/Exam
Oct 13, 2015
Sep 24, 2015
Copy of the international search report
Search/Exam
Sep 24, 2015
Published international application - A1
Search/Exam