The weekly litigation news digest is live. Subscribe now
The patent EP4182622 was granted to Maerz Ofenbau on Nov 1, 2023. The application was filed on Apr 25, 2022 under application number EP22726002A. 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 |
|---|---|---|---|
| LHOIST RECHERCHE ET DEVELOPPEMENT | Jul 24, 2024 | CALYSTA | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2011072894 |
| INTERNATIONAL-SEARCH-REPORT | CN201620107U |
| INTERNATIONAL-SEARCH-REPORT | DE19845495 |
| INTERNATIONAL-SEARCH-REPORT | DE2657239 |
| INTERNATIONAL-SEARCH-REPORT | DE3833069 |
| INTERNATIONAL-SEARCH-REPORT | US2020048146 |
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 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Means of redress
Search/Exam
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 11, 2025
Dec 9, 2025
Nov 19, 2025
Nov 14, 2025
Nov 14, 2025
Nov 6, 2025
Nov 6, 2025
Nov 6, 2025
Nov 6, 2025
Nov 6, 2025
Nov 6, 2025
Nov 6, 2025
Nov 6, 2025
Oct 30, 2025
Oct 30, 2025
Oct 30, 2025
Oct 28, 2025
Oct 22, 2025
Oct 22, 2025
Oct 22, 2025
Oct 22, 2025
Oct 21, 2025
Oct 15, 2025
Oct 15, 2025
Oct 15, 2025
Oct 14, 2025
Oct 7, 2025
Oct 7, 2025
Oct 7, 2025
Oct 7, 2025
Oct 7, 2025
Oct 7, 2025
Sep 24, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Sep 18, 2025
Aug 25, 2025
Aug 18, 2025
Aug 18, 2025
Aug 18, 2025
Aug 18, 2025
Aug 14, 2025
Aug 11, 2025
Aug 11, 2025
Aug 11, 2025
Aug 11, 2025
Aug 11, 2025
Aug 11, 2025
Aug 11, 2025
May 6, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Mar 13, 2025
Feb 5, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Jan 30, 2025
Jan 29, 2025
Jan 29, 2025
Dec 13, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Dec 10, 2024
Aug 13, 2024
Aug 13, 2024
Jul 30, 2024
Jul 24, 2024
Jul 24, 2024
Jul 24, 2024
Nov 14, 2023
Nov 6, 2023
Nov 6, 2023
Oct 6, 2023
Decision to grant a European patent
Search/Exam
Sep 20, 2023
(Electronic) Receipt
Search/Exam
Sep 20, 2023
English translation of the claims
Search/Exam
Sep 20, 2023
Filing of the translations of the claims
Search/Exam
Sep 20, 2023
French translation of claims
Search/Exam
Sep 4, 2023
Aug 29, 2023
Annexes in respect of a client data request
Search/Exam
Aug 29, 2023
Annexes in respect of a client data request
Search/Exam
Aug 29, 2023
Annexes in respect of a client data request
Search/Exam
Aug 29, 2023
Annexes in respect of a client data request
Search/Exam
Aug 29, 2023
Annexes in respect of a client data request
Search/Exam
Aug 29, 2023
Letter accompanying subsequently filed items
Search/Exam
Aug 29, 2023
Aug 17, 2023
Aug 17, 2023
Aug 17, 2023
Aug 17, 2023
Notification of the recording of a change
Search/Exam
Aug 9, 2023
Aug 9, 2023
Aug 9, 2023
Aug 9, 2023
Intention to grant (signatures)
Search/Exam
Aug 9, 2023
Text intended for grant (clean copy)
Search/Exam
Aug 9, 2023
Jul 11, 2023
Examination started
Search/Exam
May 4, 2023
(Electronic) Receipt
Search/Exam
May 4, 2023
Letter accompanying subsequently filed items
Search/Exam
May 4, 2023
May 2, 2023
Apr 26, 2023
Mar 1, 2023
Feb 24, 2023
Feb 24, 2023
Feb 23, 2023
Priority search results copy provided by EPO
Search/Exam
Feb 17, 2023
(Electronic) Receipt
Search/Exam
Feb 17, 2023
Matter concerning the application
Search/Exam
Feb 17, 2023
Priority search results
Search/Exam
Feb 17, 2023
Request for entry into the European phase
Search/Exam
Feb 8, 2023
Feb 8, 2023
Feb 8, 2023
Feb 8, 2023
Feb 8, 2023
Dec 15, 2022
Notification of election of EPO
Search/Exam
Dec 13, 2022
Dec 6, 2022
Dec 6, 2022
PCT demand form
PCT2
Dec 6, 2022
Dec 6, 2022
Nov 21, 2022
Nov 21, 2022
Nov 3, 2022
Copy of the international search report
Search/Exam
Nov 3, 2022
Copy of the international search report
Search/Exam
Nov 3, 2022
Published international application - A1
Search/Exam
Sep 15, 2022
ISR: cited documents
PCTISA
Sep 15, 2022
Sep 15, 2022
Sep 15, 2022
Sep 15, 2022
Jun 9, 2022
Jun 8, 2022
Jun 3, 2022
Apr 25, 2022
(Electronic) Receipt
PCTRO
Apr 25, 2022
Abstract
PCTRO
Apr 25, 2022
Claims
PCTRO
Apr 25, 2022
Description
PCTRO
Apr 25, 2022
Apr 25, 2022
Drawings
PCTRO
Apr 25, 2022
Apr 25, 2022