The weekly litigation news digest is live. Subscribe now
The patent EP3552817 was granted to Knauf Insulation on May 5, 2021. The application was filed on Sep 15, 2016 under application number EP19172128A. 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 |
|---|---|---|---|
| DIETRICH ISOL | Feb 3, 2022 | HEPP WENGER RYFFEL | - |
| SOPREMA | Feb 3, 2022 | CABINET NUSS | - |
| SOPREMA | Feb 3, 2022 | IPSILON | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | AT220533B |
| OPPOSITION | CH485083 |
| OPPOSITION | DD204069 |
| OPPOSITION | DE10224639 |
| OPPOSITION | DE2652952 |
| OPPOSITION | DE7007347U |
| OPPOSITION | EP2154306 |
| OPPOSITION | EP2277692 |
| OPPOSITION | EP2514731 |
| OPPOSITION | EP2650118 |
| OPPOSITION | EP3144137 |
| OPPOSITION | GB1054088 |
| OPPOSITION | US2011281485 |
| OPPOSITION | US4572862 |
| OPPOSITION | US7595092 |
| OPPOSITION | WO2013164432 |
| OPPOSITION | WO2014090707 |
| SEARCH | EP2650118 |
| SEARCH | GB1054088 |
| SEARCH | US2011281485 |
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
Get instant alerts for new documents
Dec 2, 2025
Dec 2, 2025
Dec 2, 2025
Dec 2, 2025
Nov 27, 2025
Nov 27, 2025
Nov 27, 2025
Nov 27, 2025
Nov 13, 2025
Nov 13, 2025
Nov 10, 2025
(Electronic) Receipt
Appeal
Nov 10, 2025
Nov 10, 2025
Oct 30, 2025
Oct 30, 2025
Oct 30, 2025
Oct 30, 2025
Oct 30, 2025
Oct 27, 2025
(Electronic) Receipt
Appeal
Oct 27, 2025
Oct 27, 2025
Oct 9, 2025
Oct 9, 2025
Oct 6, 2025
(Electronic) Receipt
Appeal
Oct 6, 2025
Oct 6, 2025
Jun 24, 2025
Jun 24, 2025
Jun 24, 2025
Jun 24, 2025
Jun 24, 2025
Jun 13, 2025
Jun 13, 2025
Jun 13, 2025
May 9, 2025
Mar 7, 2025
Jan 29, 2025
Jan 29, 2025
Jan 29, 2025
Jan 24, 2025
Jan 24, 2025
Dec 10, 2024
Dec 10, 2024
Dec 5, 2024
(Electronic) Receipt
Appeal
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Dec 5, 2024
Reply to appeal
Appeal
Aug 8, 2024
Aug 8, 2024
Aug 5, 2024
(Electronic) Receipt
Appeal
Aug 5, 2024
Aug 5, 2024
Jun 5, 2024
Jun 5, 2024
Jun 5, 2024
May 31, 2024
(Electronic) Receipt
Appeal
May 31, 2024
May 31, 2024
Notice of appeal
Appeal
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Means of redress
OPPO
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Apr 3, 2024
Feb 22, 2024
Feb 6, 2024
Jan 5, 2024
Jan 5, 2024
Jan 3, 2024
Jan 3, 2024
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 22, 2023
Dec 20, 2023
Dec 20, 2023
Dec 20, 2023
Dec 1, 2023
Dec 1, 2023
Nov 28, 2023
Nov 28, 2023
Nov 28, 2023
Sep 21, 2023
Sep 21, 2023
Sep 14, 2023
Sep 14, 2023
Sep 14, 2023
Jun 8, 2023
Jun 8, 2023
Jun 6, 2023
Jun 2, 2023
Jun 2, 2023
Jun 2, 2023
Jun 2, 2023
Jun 2, 2023
Jun 2, 2023
Jun 2, 2023
Jun 2, 2023
Jul 7, 2022
Jul 7, 2022
Jul 1, 2022
Jul 1, 2022
Jul 1, 2022
Jul 1, 2022
Jul 1, 2022
Feb 28, 2022
Feb 28, 2022
Feb 28, 2022
Feb 28, 2022
Feb 28, 2022
Feb 28, 2022
Feb 22, 2022
Feb 22, 2022
Feb 22, 2022
Feb 15, 2022
Feb 8, 2022
Feb 8, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
Feb 3, 2022
May 19, 2021
Apr 9, 2021
Decision to grant a European patent
Search/Exam
Mar 26, 2021
(Electronic) Receipt
Search/Exam
Mar 26, 2021
Filing of the translations of the claims
Search/Exam
Mar 26, 2021
French translation of claims
Search/Exam
Mar 26, 2021
German translation of the claims
Search/Exam
Mar 26, 2021
Letter accompanying subsequently filed items
Search/Exam
Nov 25, 2020
Nov 25, 2020
Nov 25, 2020
Intention to grant (signatures)
Search/Exam
Nov 25, 2020
Text intended for grant (clean copy)
Search/Exam
Nov 25, 2020
Oct 28, 2020
(Electronic) Receipt
Search/Exam
Oct 28, 2020
Amended description with annotations
Search/Exam
Oct 28, 2020
Description
Search/Exam
Oct 28, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 28, 2020
Jun 25, 2020
Jun 25, 2020
Jun 25, 2020
Intention to grant (signatures)
Search/Exam
Jun 25, 2020
Text intended for grant (clean copy)
Search/Exam
Jun 25, 2020
May 14, 2020
Examination started
Search/Exam
Apr 27, 2020
(Electronic) Receipt
Search/Exam
Apr 27, 2020
Apr 27, 2020
Amended claims with annotations
Search/Exam
Apr 27, 2020
Apr 27, 2020
Amended description with annotations
Search/Exam
Apr 27, 2020
Apr 27, 2020
Amendments received before examination
Search/Exam
Apr 27, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 21, 2019
Sep 18, 2019
Notification of forthcoming publication
Search/Exam
Sep 18, 2019
Refund of fees
Search/Exam
Sep 12, 2019
Sep 12, 2019
European search opinion
Search/Exam
Sep 12, 2019
European search report
Search/Exam
Sep 12, 2019
Information on Search Strategy
Search/Exam
Aug 13, 2019
Search started
Search/Exam
Jun 25, 2019
Communication to designated inventor
Search/Exam
Jun 25, 2019
Communication to designated inventor
Search/Exam
Jun 17, 2019
May 1, 2019
Abstract
Search/Exam
May 1, 2019
May 1, 2019
Claims
Search/Exam
May 1, 2019
Description
Search/Exam
May 1, 2019
Designation of inventor
Search/Exam
May 1, 2019
Drawings
Search/Exam
May 1, 2019
Request for grant of a European patent
Search/Exam
Nov 30, 2016
Priority document
Search/Exam