Return Valve

Patent No. EP3379118 (titled "Return Valve") was filed by Erhard on Feb 28, 2018. The application was issued on Aug 14, 2019.

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
DKER	May 13, 2020	HOEGER
DUKER	May 13, 2020	ULLRICH & NAUMANN PARTG MBB

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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Aug 5, 2025
Decision of the Board of Appeal
Aug 5, 2025
F3032 Notification(s) of the decision
Aug 5, 2025
F3032 Notification(s) of the decision
Jun 4, 2025
F3013 Oral Proceedings: Forwarding minutes
Jun 4, 2025
F3013 Oral Proceedings: Forwarding minutes
Jun 4, 2025
F3315 Oral Proceedings: Minutes (Appellant : Proprietor)
Mar 25, 2025
F3345 Forwarding of submissions to parties
Mar 18, 2025
(Electronic) Receipt
Mar 18, 2025
F3345 Forwarding of submissions to parties
Mar 18, 2025
Letter accompanying subsequently filed items
Mar 18, 2025
Request for interpreters during oral proceedings
Mar 11, 2025
(Electronic) Receipt
Mar 11, 2025
Letter accompanying subsequently filed items
Mar 11, 2025
Letter dealing with oral proceedings during the appeal procedure
Feb 25, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Feb 25, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Feb 25, 2025
Oral proceedings: change of venue
Feb 25, 2025
Oral proceedings: change of venue
Feb 7, 2025
F3345 Forwarding of submissions to parties
Jan 30, 2025
(Electronic) Receipt
Jan 30, 2025
Letter accompanying subsequently filed items
Jan 30, 2025
Letter relating to Appeal Procedure
Jan 30, 2025
Non-Patent Literature cited during the appeal procedure
Jan 17, 2025
F3022 Oral proceedings: change of board composition
Jan 17, 2025
F3022 Oral proceedings: change of board composition
Jan 14, 2025
F3303.16 Change of composition of the Board (T)
Jun 26, 2024
F3345 Forwarding of submissions to parties
Jun 21, 2024
(Electronic) Receipt
Jun 21, 2024
Letter accompanying subsequently filed items
Jun 21, 2024
Letter dealing with oral proceedings during the appeal procedure
Jun 5, 2024
F3011.1 Oral Proceedings: summons
Jun 5, 2024
F3011.1 Oral Proceedings: summons
Jun 5, 2024
Standard Communication Rule 103 (2) EPC
May 31, 2024
F3010 Oral proceedings: order for summons
Apr 10, 2024
Composition of the board (T)
Dec 6, 2023
F3345 Forwarding of submissions to parties
Dec 1, 2023
(Electronic) Receipt
Dec 1, 2023
Letter accompanying subsequently filed items
Dec 1, 2023
Reply to appeal
Sep 11, 2023
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Sep 4, 2023
(Electronic) Receipt
Sep 4, 2023
Amended claims with annotations
Sep 4, 2023
Claims
Sep 4, 2023
Letter accompanying subsequently filed items
Sep 4, 2023
Statement of grounds of appeal
Jul 19, 2023
F3345 Forwarding of submissions to parties
Jul 17, 2023
(Electronic) Receipt
Jul 17, 2023
Letter accompanying subsequently filed items
Jul 17, 2023
Letter relating to Appeal Procedure
Jul 7, 2023
F3204 Communication of the file number to the parties
Jul 7, 2023
F3204 Communication of the file number to the parties
Jul 4, 2023
(Electronic) Receipt
Jul 4, 2023
Letter accompanying subsequently filed items
Jul 4, 2023
Notice of appeal
Jun 28, 2023
Brief communication - Opposition proceedings
Jun 26, 2023
Communication confirming withdrawal from representation
Jun 26, 2023
Communication of amended entries concerning the representative
Jun 22, 2023
(Electronic) Receipt
Jun 22, 2023
Letter regarding the opposition procedure (no time limit)
Jun 22, 2023
Submission concerning change of proprietor's representative
Jun 20, 2023
(Electronic) Receipt
Jun 20, 2023
Letter accompanying subsequently filed items
Jun 20, 2023
Submission concerning change of proprietor's representative
May 10, 2023
Advice of delivery
Apr 25, 2023
Advice of delivery
Apr 24, 2023
Annex to the communication - opposition
Apr 24, 2023
Decision of the Opposition Division and instruction
Apr 24, 2023
Decision revoking the European patent
Apr 24, 2023
Decision revoking the European patent
Apr 24, 2023
Grounds for the decision (Annex) - opposition
Apr 24, 2023
Means of redress
Apr 24, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Apr 24, 2023
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Apr 24, 2023
Provision of a copy of the minutes - opposition procedure
Apr 24, 2023
Provision of a copy of the minutes - opposition procedure
Apr 24, 2023
Transmittal of decision / summons - opposition
Apr 24, 2023
Transmittal of decision / summons - opposition
Mar 14, 2023
Information about the result of oral proceedings
Mar 8, 2023
Brief communication - Opposition proceedings
Mar 3, 2023
(Electronic) Receipt
Mar 3, 2023
Letter accompanying subsequently filed items
Mar 3, 2023
Written submission in preparation to/during oral proceedings
Mar 1, 2023
(Electronic) Receipt
Mar 1, 2023
Letter accompanying subsequently filed items
Mar 1, 2023
Written submission in preparation to/during oral proceedings
Dec 22, 2022
Brief communication - Opposition proceedings
Dec 21, 2022
Brief communication - Opposition proceedings
Dec 15, 2022
(Electronic) Receipt
Dec 15, 2022
Any annexes (other than citation) to an opposition letter
Dec 15, 2022
Any annexes (other than citation) to an opposition letter
Dec 15, 2022
Letter accompanying subsequently filed items
Dec 15, 2022
Written submission in preparation to/during oral proceedings
Dec 13, 2022
(Electronic) Receipt
Dec 13, 2022
Letter accompanying subsequently filed items
Dec 13, 2022
Oral proceedings: reply to date proposed
Dec 8, 2022
Brief communication - Opposition proceedings
Nov 30, 2022
(Electronic) Receipt
Nov 30, 2022
Letter accompanying subsequently filed items
Nov 30, 2022
Notification concerning the date of oral proceedings
Nov 30, 2022
Notification concerning the date of oral proceedings
Nov 30, 2022
Written submission in preparation to/during oral proceedings
Nov 30, 2022
Written submission in preparation to/during oral proceedings
Nov 30, 2022
Written submission in preparation to/during oral proceedings
Nov 29, 2022
Advice of delivery
Nov 22, 2022
Brief communication - Opposition proceedings
Nov 21, 2022
Advice of delivery
Nov 21, 2022
Advice of delivery
Nov 18, 2022
Advice of delivery
Nov 16, 2022
Scanned annex to a communication - opposition procedure
Nov 16, 2022
Scanned annex to a communication - opposition procedure
Nov 16, 2022
Transmittal of decision / summons - opposition
Nov 16, 2022
Transmittal of decision / summons - opposition
Nov 16, 2022
Transmittal of decision / summons - opposition
Nov 16, 2022
Transmittal of decision / summons - opposition
Nov 14, 2022
(Electronic) Receipt
Nov 14, 2022
Letter accompanying subsequently filed items
Nov 14, 2022
Written submission in preparation to/during oral proceedings
Nov 11, 2022
Brief communication - Opposition proceedings
Nov 7, 2022
(Electronic) Receipt
Nov 7, 2022
(Electronic) Receipt
Nov 7, 2022
Citation in opposition procedure - 021
Nov 7, 2022
Citation in opposition procedure - 023
Nov 7, 2022
Citation in opposition procedure - 025
Nov 7, 2022
Citation in opposition procedure - 027
Nov 7, 2022
Citation in opposition procedure - 029
Nov 7, 2022
Letter accompanying subsequently filed items
Nov 7, 2022
Letter accompanying subsequently filed items
Nov 7, 2022
Written submission in preparation to/during oral proceedings
Nov 7, 2022
Written submission in preparation to/during oral proceedings
Jun 14, 2022
Brief communication - Opposition proceedings
Jun 3, 2022
(Electronic) Receipt
Jun 3, 2022
Letter accompanying subsequently filed items
Jun 3, 2022
Written submission in preparation to/during oral proceedings
May 30, 2022
Advice of delivery
May 27, 2022
Advice of delivery
May 25, 2022
Annex to the communication - opposition
May 25, 2022
Information concerning oral proceedings
May 25, 2022
Transmittal of decision / summons - opposition
May 25, 2022
Transmittal of decision / summons - opposition
Apr 22, 2022
Brief communication - Opposition proceedings
Apr 12, 2022
(Electronic) Receipt
Apr 12, 2022
Letter accompanying subsequently filed items
Apr 12, 2022
Request for change of opponent's representative
Mar 29, 2022
Brief communication - Opposition proceedings
Mar 29, 2022
Brief communication - Opposition proceedings
Mar 29, 2022
Communication of amended entries
Mar 29, 2022
Communication of amended entries
Mar 23, 2022
(Electronic) Receipt
Mar 23, 2022
Letter accompanying subsequently filed items
Mar 23, 2022
Request for change of opponent's representative
Dec 17, 2021
Enlargement of the examining/opposition division
Nov 12, 2021
Brief communication - Opposition proceedings
Nov 11, 2021
Notification concerning the date of oral proceedings
Nov 11, 2021
Notification concerning the date of oral proceedings
Nov 8, 2021
(Electronic) Receipt
Nov 8, 2021
Letter accompanying subsequently filed items
Nov 8, 2021
Written submission in preparation to/during oral proceedings
Oct 20, 2021
Notification concerning the date of oral proceedings
Oct 20, 2021
Notification concerning the date of oral proceedings
Oct 7, 2021
Brief communication - Opposition proceedings
Oct 5, 2021
Brief communication - Opposition proceedings
Sep 29, 2021
(Electronic) Receipt
Sep 29, 2021
Letter accompanying subsequently filed items
Sep 29, 2021
Main request during Opposition procedure
Sep 29, 2021
Written submission in preparation to/during oral proceedings
Sep 23, 2021
(Electronic) Receipt
Sep 23, 2021
Citation in opposition procedure - 062
Sep 23, 2021
Consolidated list of cited opposition documents
Sep 23, 2021
Letter accompanying subsequently filed items
Sep 23, 2021
Written submission in preparation to/during oral proceedings
Aug 6, 2021
Brief communication - Opposition proceedings
Aug 2, 2021
(Electronic) Receipt
Aug 2, 2021
Letter accompanying subsequently filed items
Aug 2, 2021
Written submission in preparation to/during oral proceedings
Jul 23, 2021
Brief communication - Opposition proceedings
Jul 14, 2021
(Electronic) Receipt
Jul 14, 2021
(Electronic) Receipt
Jul 14, 2021
(Electronic) Receipt
Jul 14, 2021
Letter accompanying subsequently filed items
Jul 14, 2021
Letter accompanying subsequently filed items
Jul 14, 2021
Letter accompanying subsequently filed items
Jul 14, 2021
Written submission in preparation to/during oral proceedings
Jul 1, 2021
Notification concerning the date of oral proceedings
Jul 1, 2021
Notification concerning the date of oral proceedings
Jun 29, 2021
Brief communication - Opposition proceedings
Jun 23, 2021
(Electronic) Receipt
Jun 23, 2021
Letter accompanying subsequently filed items
Jun 23, 2021
Written submission in preparation to/during oral proceedings
May 31, 2021
Brief communication - Opposition proceedings
May 20, 2021
(Electronic) Receipt
May 20, 2021
Letter accompanying subsequently filed items
May 20, 2021
Request for interpreters during oral proceedings
May 6, 2021
Advice of delivery
May 4, 2021
(Electronic) Receipt
May 4, 2021
Advice of delivery
May 4, 2021
Letter accompanying subsequently filed items
Apr 30, 2021
Annex to the communication - opposition
Apr 30, 2021
Information concerning oral proceedings
Apr 30, 2021
Summons to attend oral proceedings
Apr 30, 2021
Summons to attend oral proceedings
Apr 30, 2021
Transmittal of decision / summons - opposition
Apr 30, 2021
Transmittal of decision / summons - opposition
Oct 9, 2020
Brief communication - Opposition proceedings
Sep 25, 2020
(Electronic) Receipt
Sep 25, 2020
Citation in opposition procedure - 059
Sep 25, 2020
Citation in opposition procedure - 060
Sep 25, 2020
Citation in opposition procedure - 061
Sep 25, 2020
Letter accompanying subsequently filed items
Sep 25, 2020
Reply of the patent proprietor to the notice(s) of opposition
Jul 1, 2020
Brief communication - Opposition proceedings
Jun 23, 2020
(Electronic) Receipt
Jun 23, 2020
Letter accompanying subsequently filed items
Jun 23, 2020
Reply of the patent proprietor to the notice(s) of opposition
Jun 17, 2020
Communication of a notice of opposition and request to file observations
Jun 17, 2020
Notice of further oppositions to opponent(s)
Jun 15, 2020
Brief communication - Opposition proceedings
Jun 12, 2020
Brief communication - Opposition proceedings
Jun 4, 2020
(Electronic) Receipt
Jun 4, 2020
Citation in opposition procedure - 056
Jun 4, 2020
Citation in opposition procedure - 057
Jun 4, 2020
Citation in opposition procedure - 058
Jun 4, 2020
Letter accompanying subsequently filed items
Jun 4, 2020
Letter regarding the opposition procedure (no time limit)
May 27, 2020
Request for documents
May 25, 2020
Communication of a notice of opposition - first information to patent proprietor
May 13, 2020
(Electronic) Receipt
May 13, 2020
Any annexes (other than citation) to an opposition letter
May 13, 2020
Any annexes (other than citation) to an opposition letter
May 13, 2020
Any annexes (other than citation) to an opposition letter
May 13, 2020
Citation in opposition procedure - 001
May 13, 2020
Citation in opposition procedure - 002
May 13, 2020
Citation in opposition procedure - 003
May 13, 2020
Citation in opposition procedure - 004
May 13, 2020
Citation in opposition procedure - 005
May 13, 2020
Citation in opposition procedure - 006
May 13, 2020
Citation in opposition procedure - 007
May 13, 2020
Citation in opposition procedure - 008
May 13, 2020
Citation in opposition procedure - 009
May 13, 2020
Citation in opposition procedure - 010
May 13, 2020
Citation in opposition procedure - 011
May 13, 2020
Citation in opposition procedure - 012
May 13, 2020
Citation in opposition procedure - 013
May 13, 2020
Citation in opposition procedure - 014
May 13, 2020
Citation in opposition procedure - 015
May 13, 2020
Citation in opposition procedure - 016
May 13, 2020
Citation in opposition procedure - 017
May 13, 2020
Citation in opposition procedure - 018
May 13, 2020
Citation in opposition procedure - 019
May 13, 2020
Citation in opposition procedure - 020
May 13, 2020
Citation in opposition procedure - 021
May 13, 2020
Citation in opposition procedure - 022
May 13, 2020
Citation in opposition procedure - 023
May 13, 2020
Citation in opposition procedure - 024
May 13, 2020
Citation in opposition procedure - 025
May 13, 2020
Citation in opposition procedure - 026
May 13, 2020
Citation in opposition procedure - 027
May 13, 2020
Citation in opposition procedure - 028
May 13, 2020
Citation in opposition procedure - 029
May 13, 2020
Citation in opposition procedure - 030
May 13, 2020
Citation in opposition procedure - 031
May 13, 2020
Citation in opposition procedure - 032
May 13, 2020
Citation in opposition procedure - 033
May 13, 2020
Citation in opposition procedure - 034
May 13, 2020
Citation in opposition procedure - 035
May 13, 2020
Citation in opposition procedure - 036
May 13, 2020
Citation in opposition procedure - 037
May 13, 2020
Citation in opposition procedure - 038
May 13, 2020
Citation in opposition procedure - 039
May 13, 2020
Citation in opposition procedure - 040
May 13, 2020
Citation in opposition procedure - 041
May 13, 2020
Citation in opposition procedure - 042
May 13, 2020
Citation in opposition procedure - 043
May 13, 2020
Citation in opposition procedure - 044
May 13, 2020
Citation in opposition procedure - 045
May 13, 2020
Citation in opposition procedure - 046
May 13, 2020
Citation in opposition procedure - 047
May 13, 2020
Citation in opposition procedure - 048
May 13, 2020
Citation in opposition procedure - 049
May 13, 2020
Citation in opposition procedure - 050
May 13, 2020
Citation in opposition procedure - 051
May 13, 2020
Citation in opposition procedure - 052
May 13, 2020
Citation in opposition procedure - 053
May 13, 2020
Citation in opposition procedure - 054
May 13, 2020
Citation in opposition procedure - 055
May 13, 2020
Letter regarding the opposition procedure (no time limit)
May 13, 2020
Non-scannable object
May 13, 2020
Non-scannable object
May 13, 2020
Non-scannable object
May 13, 2020
Non-scannable object
May 13, 2020
Notice of opposition
May 13, 2020
Notice of opposition
Aug 26, 2019
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jul 18, 2019
Decision to grant a European patent
Jun 4, 2019
(Electronic) Receipt
Jun 4, 2019
English translation of the claims
Jun 4, 2019
Filing of the translations of the claims
Jun 4, 2019
French translation of claims
Jun 4, 2019
Letter accompanying subsequently filed items
Apr 17, 2019
Bibliographic data of the European patent application
Apr 17, 2019
Communication about intention to grant a European patent
Apr 17, 2019
Intention to grant (signatures)
Apr 17, 2019
Text intended for grant (clean copy)
Apr 17, 2019
Text intended for grant (version for approval)
Mar 28, 2019
Examination started
Nov 28, 2018
(Electronic) Receipt
Nov 28, 2018
Letter accompanying subsequently filed items
Nov 28, 2018
Priority search results
Nov 28, 2018
Reply to invitation to file a copy of priority search results
Nov 13, 2018
Invitation to file a copy of search results(priority)
Oct 30, 2018
(Electronic) Receipt
Oct 30, 2018
Letter accompanying subsequently filed items
Oct 30, 2018
Matter concerning the application
Oct 1, 2018
Reminder period for payment of examination fee/designation fee and correction of deficiencies in Written Opinion/amendment
Sep 27, 2018
(Electronic) Receipt
Sep 27, 2018
Amended claims filed after receipt of (European) search report
Sep 27, 2018
Amended claims with annotations
Sep 27, 2018
Amended drawings filed after receipt of (European) search report
Sep 27, 2018
Amendments received before examination
Sep 27, 2018
Letter accompanying subsequently filed items
Aug 29, 2018
Notification of forthcoming publication
Aug 28, 2018
Communication regarding the transmission of the European search report
Aug 28, 2018
European search opinion
Aug 28, 2018
European search report
Aug 28, 2018
Information on Search Strategy
Aug 22, 2018
Modified abstract
Aug 9, 2018
Search started
Apr 23, 2018
Communication to designated inventor
Apr 4, 2018
Letter concerning the priority
Apr 4, 2018
Priority document
Feb 28, 2018
Abstract
Feb 28, 2018
Acknowledgement of receipt of electronic submission of the request for grant of a European patent
Feb 28, 2018
Claims
Feb 28, 2018
Description
Feb 28, 2018
Designation of inventor
Feb 28, 2018
Drawings
Feb 28, 2018
Request for grant of a European patent

EP3379118

ERHARD

Application Number: EP18159033A
Filing Date: Feb 28, 2018
Status: Revoked; Aug 8, 2025
Publication Date: Aug 14, 2019
External Links: Slate, Register , Google Patents

IP Verse

Return Valve

Patent Summary

Patent Family

Patent Oppositions (2)

Dossier Documents

EP3379118