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IP Verse

An Apparatus For Sensing Liquid Level, A Device Using The Said Apparatus, And A Calibration Method

Patent No. EP3749933 (titled "An Apparatus For Sensing Liquid Level, A Device Using The Said Apparatus, And A Calibration Method") was filed by Arzum Elektrikli EV Aletleri SAN VE TIC on Feb 6, 2019. The application was issued on Mar 29, 2023.

Patent Summary

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Patent Oppositions

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
MELITTA EUROPA	Dec 19, 2023	DANTZ

Dossier Documents

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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Sep 29, 2025
Communication to the parties concerning termination of the opposition proceedings - opposition rejected - no appeal lodged
Sep 29, 2025
Communication to the parties concerning the termination of the opposition proceedings (opponent)
Jun 24, 2025
Annex to the communication - opposition
Jun 24, 2025
Brief communication - Opposition proceedings
Jun 24, 2025
Brief communication - Opposition proceedings
Jun 24, 2025
Decision rejecting the opposition
Jun 24, 2025
Decision rejecting the opposition
Jun 24, 2025
Grounds for the decision (Annex) - opposition
Jun 24, 2025
Means of redress
Jun 24, 2025
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Jun 24, 2025
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Jun 24, 2025
Provision of a copy of the minutes - opposition procedure
Jun 24, 2025
Provision of a copy of the minutes - opposition procedure
Jun 24, 2025
Scanned annex to a communication - opposition procedure
Jun 20, 2025
Decision of the Opposition Division and instruction
May 14, 2025
Annex to the communication - opposition
May 14, 2025
Information about the result of oral proceedings
May 14, 2025
Notification concerning the date of oral proceedings
May 14, 2025
Notification concerning the date of oral proceedings
Apr 4, 2025
Brief communication - Opposition proceedings
Mar 24, 2025
Annex to the communication
Mar 24, 2025
Notification concerning the date of oral proceedings
Mar 24, 2025
Notification concerning the date of oral proceedings
Mar 20, 2025
Brief communication - Opposition proceedings
Mar 19, 2025
Brief communication - Opposition proceedings
Mar 13, 2025
(Electronic) Receipt
Mar 13, 2025
General authorisation
Mar 13, 2025
Letter accompanying subsequently filed items
Mar 13, 2025
Oral proceedings: Request for postponement
Mar 12, 2025
(Electronic) Receipt
Mar 12, 2025
Letter accompanying subsequently filed items
Mar 12, 2025
Written submission in preparation to/during oral proceedings
Sep 18, 2024
Annex to the communication - opposition
Sep 18, 2024
Brief communication - Opposition proceedings
Sep 18, 2024
Brief communication - Opposition proceedings
Sep 18, 2024
Information concerning oral proceedings
Sep 18, 2024
Scanned annex to a communication - opposition procedure
Sep 18, 2024
Summons to attend oral proceedings
Sep 18, 2024
Summons to attend oral proceedings
May 22, 2024
Brief communication - Opposition proceedings
May 16, 2024
(Electronic) Receipt
May 16, 2024
Letter accompanying subsequently filed items
May 16, 2024
Reply of the patent proprietor to the notice(s) of opposition
Jan 16, 2024
Communication of a notice of opposition and request to file observations
Jan 16, 2024
Notice of further oppositions to opponent(s)
Jan 2, 2024
Communication of a notice of opposition - first information to patent proprietor
Dec 19, 2023
(Electronic) Receipt
Dec 19, 2023
Citation in opposition procedure - 001
Dec 19, 2023
Citation in opposition procedure - 002
Dec 19, 2023
Citation in opposition procedure - 003
Dec 19, 2023
Citation in opposition procedure - 004
Dec 19, 2023
Citation in opposition procedure - 005
Dec 19, 2023
Citation in opposition procedure - 006
Dec 19, 2023
Consolidated list of cited opposition documents
Dec 19, 2023
Notice of opposition
Dec 19, 2023
Notice of opposition
Apr 13, 2023
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Mar 2, 2023
Decision to grant a European patent
Feb 15, 2023
(Electronic) Receipt
Feb 15, 2023
Filing of the translations of the claims
Feb 15, 2023
French translation of claims
Feb 15, 2023
German translation of the claims
Jan 17, 2023
Communication for party to proceedings/third party
Oct 5, 2022
Bibliographic data of the European patent application
Oct 5, 2022
Communication about intention to grant a European patent
Oct 5, 2022
Intention to grant (signatures)
Oct 5, 2022
Text intended for grant (clean copy)
Oct 5, 2022
Text intended for grant (version for approval)
Jul 22, 2022
Examination started
Jun 28, 2022
(Electronic) Receipt
Jun 28, 2022
Letter accompanying subsequently filed items
Jun 28, 2022
Priority search results
May 2, 2022
Invitation to file a copy of search results(priority)
Apr 15, 2022
(Electronic) Receipt
Apr 15, 2022
Letter accompanying subsequently filed items
Apr 15, 2022
Maintenance of the application
Oct 29, 2021
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Oct 12, 2021
Communication regarding the transmission of the European search report
Oct 12, 2021
European search opinion
Oct 12, 2021
Information on Search Strategy
Oct 12, 2021
Supplementary European search report
Sep 27, 2021
Search started
Nov 18, 2020
Notification on forthcoming publication of bibliographic data
Sep 21, 2020
Annexes to the international preliminary examination report
Sep 21, 2020
Copy of the international preliminary examination report
Sep 17, 2020
Communication regarding possible amendment of the application/payment of claims fee
Sep 15, 2020
Communication to designated inventor
Sep 15, 2020
Communication to designated inventor
Sep 11, 2020
Reminder for payment period (examination fee/designation fees)
Sep 7, 2020
(Electronic) Receipt
Sep 7, 2020
Amended claims filed after receipt of (European) search report
Sep 7, 2020
Amended claims with annotations
Sep 7, 2020
Amended description filed after receipt of (European) search report
Sep 7, 2020
Amended drawings filed after receipt of (European) search report
Sep 7, 2020
Annex
Sep 7, 2020
Request for entry into the European phase
Aug 25, 2020
Annex to International preliminary examination report
Aug 25, 2020
International preliminary examination report
Aug 25, 2020
International preliminary examination report - free text sheet
Aug 25, 2020
International preliminary examination report - points I-VIII
Aug 25, 2020
Transmittal of International Preliminary Examination Report
Aug 2, 2020
PCT(IPEA): Amended sheet - claims
Aug 2, 2020
PCT(IPEA): Amended sheet - claims
Aug 2, 2020
PCT(IPEA): Amended sheet - description
Aug 2, 2020
PCT(IPEA): Amended sheet - description
Aug 2, 2020
Reply to communication PCT/IPEA/408
Aug 2, 2020
Reply to communication PCT/IPEA/408
Jul 27, 2020
Despatch of copy of consultation
Jul 27, 2020
Result of consultation
Jul 27, 2020
Separate sheet with IPEA428
Jul 6, 2020
Written opinion
Jul 6, 2020
Written opinion - free text sheet
Jul 6, 2020
Written opinion - points I-VIII
Jun 18, 2020
Notification of election of EPO
Jun 5, 2020
Amendments of documents (Article 19 PCT)
May 25, 2020
Notification of receipt of demand
May 15, 2020
PCT demand form
May 15, 2020
PCT(IPEA): Amended sheet - claims
May 15, 2020
PCT(IPEA): Amended sheet - claims
May 15, 2020
PCT(IPEA): Amended sheet - description
May 15, 2020
PCT(IPEA): Amended sheet - description
May 15, 2020
Payment of fees and costs
May 15, 2020
Reply to International Search Opinion
Mar 26, 2020
Copy of the international search report
Mar 26, 2020
Copy of the international search report
Mar 26, 2020
International publication of the international search report
Feb 21, 2020
Priority document (electronically transmitted)
Jan 30, 2020
Published international application - A2

EP3749933

ARZUM ELEKTRIKLI EV ALETLERI SAN VE TIC

Application Number: EP19841791A
Filing Date: Feb 6, 2019
Status: Opposition Rejected; Sep 26, 2025
Publication Date: Mar 29, 2023
External Links: Slate, EP3749933B1, Google Patents