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The patent EP3437711 was granted to Fanca on Apr 19, 2023. The application was filed on May 10, 2018 under application number EP18275065A. 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 |
|---|---|---|---|
| CFT COMPACT FILTER TECHNIC | Jan 19, 2024 | DOMPATENT VON PATENT UND RECHTSANWALTEN | ADMISSIBLE |
| CFT COMPACT FILTER TECHNIC | Jan 19, 2024 | SCHULTE & SCHULTE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | JP2003239699 |
| OPPOSITION | AU2016101414 |
| OPPOSITION | CN104653218 |
| OPPOSITION | CN104759176 |
| OPPOSITION | CN201460957U |
| OPPOSITION | CN204447655U |
| OPPOSITION | JP2003239699 |
| OPPOSITION | US2015291180 |
| OPPOSITION | US2016047241 |
| OPPOSITION | US3541631 |
| OPPOSITION | US4348057 |
| OPPOSITION | US5597393 |
| OPPOSITION | US9228321 |
| OPPOSITION | US9340214 |
| OPPOSITION | WO2015120905 |
| SEARCH | AU2016101414 |
| SEARCH | US3541631 |
| SEARCH | US4348057 |
| SEARCH | US4869737 |
| SEARCH | US5597393 |
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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Nov 13, 2025
Nov 10, 2025
(Electronic) Receipt
Appeal
Nov 10, 2025
Nov 10, 2025
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Sep 15, 2025
Sep 15, 2025
Sep 10, 2025
(Electronic) Receipt
Appeal
Sep 10, 2025
Sep 10, 2025
Notice of appeal
Appeal
Jul 10, 2025
Jul 10, 2025
Jul 10, 2025
Jul 10, 2025
Jul 10, 2025
Jul 10, 2025
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Means of redress
OPPO
Jul 10, 2025
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May 22, 2025
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Authorisation
OPPO
May 21, 2025
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Apr 11, 2025
Apr 11, 2025
Apr 8, 2025
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Authorisation
OPPO
Apr 8, 2025
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Mar 27, 2025
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Authorisation
OPPO
Mar 21, 2025
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May 4, 2023
Mar 23, 2023
Decision to grant a European patent
Search/Exam
Mar 7, 2023
(Electronic) Receipt
Search/Exam
Mar 7, 2023
Filing of the translations of the claims
Search/Exam
Mar 7, 2023
French translation of claims
Search/Exam
Mar 7, 2023
German translation of the claims
Search/Exam
Mar 7, 2023
Letter accompanying subsequently filed items
Search/Exam
Jan 30, 2023
Jan 16, 2023
Jan 16, 2023
Jan 16, 2023
Jan 16, 2023
Intention to grant (signatures)
Search/Exam
Jan 16, 2023
Text intended for grant (clean copy)
Search/Exam
Jan 16, 2023
Jan 2, 2023
Jan 2, 2023
Dec 21, 2022
Observations by third parties
Search/Exam
Sep 27, 2022
(Electronic) Receipt
Search/Exam
Sep 27, 2022
Letter accompanying subsequently filed items
Search/Exam
Sep 27, 2022
Jul 28, 2022
Jul 25, 2022
(Electronic) Receipt
Search/Exam
Jul 25, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 25, 2022
Mar 30, 2022
Annex to the communication
Search/Exam
Mar 30, 2022
Communication from the Examining Division
Search/Exam
Mar 28, 2022
Mar 28, 2022
Mar 23, 2022
(Electronic) Receipt
Search/Exam
Mar 23, 2022
Citation filed by a third party
Search/Exam
Mar 23, 2022
Observations by third parties
Search/Exam
Feb 1, 2022
(Electronic) Receipt
Search/Exam
Feb 1, 2022
Letter accompanying subsequently filed items
Search/Exam
Feb 1, 2022
Nov 10, 2021
Nov 10, 2021
Oct 28, 2021
Annex to the communication
Search/Exam
Oct 28, 2021
Communication from the Examining Division
Search/Exam
Sep 22, 2021
(Electronic) Receipt
Search/Exam
Sep 22, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 22, 2021
Non-patent literature filed by a third party
Search/Exam
Sep 22, 2021
Observations by third parties
Search/Exam
Aug 31, 2021
(Electronic) Receipt
Search/Exam
Aug 31, 2021
Amended claims with annotations
Search/Exam
Aug 31, 2021
Amended description with annotations
Search/Exam
Aug 31, 2021
Claims
Search/Exam
Aug 31, 2021
Description
Search/Exam
Aug 31, 2021
Letter accompanying subsequently filed items
Search/Exam
Aug 31, 2021
Apr 28, 2021
Annex to the communication
Search/Exam
Apr 28, 2021
Communication from the Examining Division
Search/Exam
Mar 30, 2021
(Electronic) Receipt
Search/Exam
Mar 30, 2021
Amended claims with annotations
Search/Exam
Mar 30, 2021
Claims
Search/Exam
Mar 30, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 30, 2021
Dec 2, 2020
Annex to a communication
Search/Exam
Dec 2, 2020
Annex to the communication
Search/Exam
Dec 2, 2020
Communication from the Examining Division
Search/Exam
Oct 21, 2020
(Electronic) Receipt
Search/Exam
Oct 21, 2020
Amended claims with annotations
Search/Exam
Oct 21, 2020
Claims
Search/Exam
Oct 21, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 21, 2020
Jun 26, 2020
Annex to the communication
Search/Exam
Jun 26, 2020
Communication from the Examining Division
Search/Exam
Apr 22, 2020
(Electronic) Receipt
Search/Exam
Apr 22, 2020
Amended claims with annotations
Search/Exam
Apr 22, 2020
Claims
Search/Exam
Apr 22, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 22, 2020
Jan 24, 2020
Annex to the communication
Search/Exam
Jan 24, 2020
Communication from the Examining Division
Search/Exam
Jan 17, 2020
Examination started
Search/Exam
Nov 19, 2019
Nov 19, 2019
Nov 12, 2019
(Electronic) Receipt
Search/Exam
Nov 12, 2019
Citation filed by a third party
Search/Exam
Nov 12, 2019
Observations by third parties
Search/Exam
Aug 28, 2019
(Electronic) Receipt
Search/Exam
Aug 28, 2019
Letter accompanying subsequently filed items
Search/Exam
Aug 28, 2019
Aug 1, 2019
Jul 23, 2019
(Electronic) Receipt
Search/Exam
Jul 23, 2019
Jul 23, 2019
Amended claims with annotations
Search/Exam
Jul 23, 2019
Jul 23, 2019
Amended description with annotations
Search/Exam
Jul 23, 2019
Amendments received before examination
Search/Exam
Jul 23, 2019
Letter accompanying subsequently filed items
Search/Exam
Mar 22, 2019
Mar 4, 2019
(Electronic) Receipt
Search/Exam
Mar 4, 2019
Annexes in respect of a client data request
Search/Exam
Mar 4, 2019
Letter accompanying subsequently filed items
Search/Exam
Mar 4, 2019
Feb 11, 2019
Jan 9, 2019
Notification of forthcoming publication
Search/Exam
Dec 3, 2018
Dec 3, 2018
European search opinion
Search/Exam
Dec 3, 2018
European search report
Search/Exam
Dec 3, 2018
Information on Search Strategy
Search/Exam
Nov 19, 2018
Search started
Search/Exam
Jul 27, 2018
Communication to designated inventor
Search/Exam
Jun 8, 2018
Letter concerning the priority
Search/Exam
Jun 8, 2018
Priority document
Search/Exam
Jun 8, 2018
Priority document
Search/Exam
May 16, 2018
May 10, 2018
Abstract
Search/Exam
May 10, 2018
May 10, 2018
Claims
Search/Exam
May 10, 2018
Description
Search/Exam
May 10, 2018
Designation of inventor
Search/Exam
May 10, 2018
Drawings
Search/Exam
May 10, 2018
Letter concerning fees and payments
Search/Exam
May 10, 2018
Matter concerning the application
Search/Exam
May 10, 2018
Request for grant of a European patent
Search/Exam