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The patent EP2421805 was granted to Knauf Insulation on Jun 18, 2025. The application was filed on Apr 23, 2010 under application number EP10718534A. 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 |
|---|---|---|---|
| SAINT GOBAIN | Dec 20, 2019 | SAINT GOBAIN RECHERCHE | ADMISSIBLE |
| ROCKWOOL | Dec 19, 2019 | MEISSNER BOLTE PARTNERSCHAFT MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE29822362U |
| DESCRIPTION | DE3229601 |
| DESCRIPTION | EP1108694 |
| DESCRIPTION | WO2007014236 |
| EXAMINATION | US2003040239 |
| EXAMINATION | US2003087576 |
| EXAMINATION | US5633077 |
| INTERNATIONAL-SEARCH-REPORT | DE10237764 |
| INTERNATIONAL-SEARCH-REPORT | DE19857817 |
| INTERNATIONAL-SEARCH-REPORT | DE20120904U |
| INTERNATIONAL-SEARCH-REPORT | DE29923439U |
| INTERNATIONAL-SEARCH-REPORT | EP0101376 |
| INTERNATIONAL-SEARCH-REPORT | EP1108694 |
| OPPOSITION | CN101230218 |
| OPPOSITION | DE10237764 |
| OPPOSITION | DE20120904U |
| OPPOSITION | DE29923439U |
| OPPOSITION | DE3229601 |
| OPPOSITION | EP1688456 |
| OPPOSITION | FR2223200 |
| OPPOSITION | GB2330408 |
| OPPOSITION | US2009084981 |
| OPPOSITION | US2841858 |
| OPPOSITION | US2920202 |
| OPPOSITION | US5863459 |
| OPPOSITION | US6217794 |
| OPPOSITION | WO2007080361 |
| OPPOSITION | WO2008000461 |
| OPPOSITION | WO2008148792 |
| OPPOSITION | WO9118006 |
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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Appeal
Dec 8, 2021
Claims
Appeal
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Notice of appeal
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Search/Exam
May 20, 2019
Letter accompanying subsequently filed items
Search/Exam
May 20, 2019
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Decision to grant a European patent
Search/Exam
Feb 7, 2019
(Electronic) Receipt
Search/Exam
Feb 7, 2019
Filing of the translations of the claims
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French translation of claims
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German translation of the claims
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Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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(Electronic) Receipt
Search/Exam
Jun 21, 2016
Amended claims with annotations
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Jun 21, 2016
Amended description with annotations
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Jun 21, 2016
Claims
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Jun 21, 2016
Description
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Jun 21, 2016
Letter accompanying subsequently filed items
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(Electronic) Receipt
Search/Exam
Apr 7, 2016
Letter accompanying subsequently filed items
Search/Exam
Apr 7, 2016
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Annex to the communication
Search/Exam
Dec 11, 2015
Communication from the Examining Division
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Annexes in respect of a client data request
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(Electronic) Receipt
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Oct 21, 2011
Request for entry into the European phase
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Sep 2, 2011
Information on entry into European phase
Search/Exam
Nov 18, 2010
Oct 28, 2010
Copy of the international search report
Search/Exam
Oct 28, 2010
Published international application - A1
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Sep 3, 2010
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Apr 23, 2010
(Electronic) Receipt
PCTRO
Apr 23, 2010
Abstract
PCTRO
Apr 23, 2010
Claims
PCTRO
Apr 23, 2010
Description
PCTRO