Inverse Dispersion Comprising A Cationic Polymer And A Stabilizing Agent

Patent No. EP2852622 (titled "Inverse Dispersion Comprising A Cationic Polymer And A Stabilizing Agent") was filed by Basf on Apr 29, 2013. The application was issued on Oct 18, 2017.

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
SNF	Jul 6, 2018	HOFFMANN EITLE

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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Oct 6, 2025
Refund of fees
Sep 29, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Sep 29, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Sep 26, 2025
F3014 Oral Proceedings: Order cancelling/postponing
Sep 26, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Sep 26, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Sep 26, 2025
F3345 Forwarding of submissions to parties
Sep 25, 2025
(Electronic) Receipt
Sep 25, 2025
Letter accompanying subsequently filed items
Sep 25, 2025
Withdrawal of an appeal
Sep 12, 2025
F3345 Forwarding of submissions to parties
Sep 9, 2025
(Electronic) Receipt
Sep 9, 2025
Letter accompanying subsequently filed items
Sep 9, 2025
Request for interpreters during oral proceedings
Sep 1, 2025
F3345 Forwarding of submissions to parties
Aug 27, 2025
(Electronic) Receipt
Aug 27, 2025
Letter accompanying subsequently filed items
Aug 27, 2025
Request for interpreters during oral proceedings
Aug 25, 2025
F3345 Forwarding of submissions to parties
Aug 22, 2025
(Electronic) Receipt
Aug 22, 2025
Letter accompanying subsequently filed items
Aug 22, 2025
Letter dealing with oral proceedings during the appeal procedure
Aug 1, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Aug 1, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Mar 3, 2025
F3345 Forwarding of submissions to parties
Feb 25, 2025
(Electronic) Receipt
Feb 25, 2025
Letter accompanying subsequently filed items
Feb 25, 2025
Letter dealing with oral proceedings during the appeal procedure
Feb 13, 2025
Oral proceedings: change of venue
Feb 13, 2025
Oral proceedings: change of venue
Jan 17, 2025
F3345 Forwarding of submissions to parties
Jan 15, 2025
(Electronic) Receipt
Jan 15, 2025
Letter accompanying subsequently filed items
Jan 15, 2025
Letter dealing with oral proceedings during the appeal procedure
Dec 9, 2024
F3004 Communication of the Registry
Dec 9, 2024
F3004 Communication of the Registry
Dec 9, 2024
F3011.1 Oral Proceedings: summons
Dec 9, 2024
F3011.1 Oral Proceedings: summons
Dec 4, 2024
F3010 Oral proceedings: order for summons
Jun 25, 2024
F3017 Oral Proceedings: Notification of cancellation/postponing
Jun 25, 2024
F3017 Oral Proceedings: Notification of cancellation/postponing
Jun 25, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Jun 25, 2024
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Jun 24, 2024
F3014 Oral Proceedings: Order cancelling/postponing
Oct 10, 2023
F3017 Oral Proceedings: Notification of cancellation/postponing
Oct 10, 2023
F3017 Oral Proceedings: Notification of cancellation/postponing
Oct 6, 2023
F3014 Oral Proceedings: Order cancelling/postponing
Sep 14, 2023
F3345 Forwarding of submissions to parties
Sep 13, 2023
(Electronic) Receipt
Sep 13, 2023
Letter accompanying subsequently filed items
Sep 13, 2023
Oral proceedings: Request for postponement
Aug 4, 2023
F3345 Forwarding of submissions to parties
Aug 4, 2023
Oral proceedings: change of venue
Aug 4, 2023
Oral proceedings: change of venue
Jul 31, 2023
(Electronic) Receipt
Jul 31, 2023
Letter accompanying subsequently filed items
Jul 31, 2023
Letter dealing with oral proceedings during the appeal procedure
Jul 4, 2023
(Electronic) Receipt
Jul 4, 2023
F3936 Acknowledgement of receipt Board of Appeal
Jul 4, 2023
Letter accompanying subsequently filed items
Jun 16, 2023
F3017 Oral Proceedings: Notification of cancellation/postponing
Jun 16, 2023
F3017 Oral Proceedings: Notification of cancellation/postponing
Jun 16, 2023
F3345 Forwarding of submissions to parties
Jun 13, 2023
F3014 Oral Proceedings: Order cancelling/postponing
Jun 12, 2023
(Electronic) Receipt
Jun 12, 2023
Letter accompanying subsequently filed items
Jun 12, 2023
Letter dealing with oral proceedings during the appeal procedure
Jun 7, 2023
F3345 Forwarding of submissions to parties
Jun 6, 2023
(Electronic) Receipt
Jun 6, 2023
Advice of delivery
Jun 6, 2023
Letter accompanying subsequently filed items
Jun 2, 2023
(Electronic) Receipt
Jun 2, 2023
Annexes (other than cited documents) regarding appeal procedure
Jun 2, 2023
Letter accompanying subsequently filed items
Jun 2, 2023
Oral proceedings: Request for postponement
Jun 1, 2023
F3004 Communication of the Registry
Jun 1, 2023
F3004 Communication of the Registry
Jun 1, 2023
F3011.1 Oral Proceedings: summons
Jun 1, 2023
F3011.1 Oral Proceedings: summons
May 26, 2023
F3010 Oral proceedings: order for summons
May 11, 2023
F3345 Forwarding of submissions to parties
May 8, 2023
(Electronic) Receipt
May 8, 2023
Letter accompanying subsequently filed items
May 8, 2023
Letter relating to Appeal Procedure
Mar 23, 2023
F3345 Forwarding of submissions to parties
Mar 20, 2023
(Electronic) Receipt
Mar 20, 2023
Letter accompanying subsequently filed items
Mar 20, 2023
Letter relating to Appeal Procedure
Jan 19, 2023
F3345 Forwarding of submissions to parties
Jan 16, 2023
(Electronic) Receipt
Jan 16, 2023
Letter accompanying subsequently filed items
Jan 16, 2023
Letter relating to Appeal Procedure
Oct 11, 2022
F3345 Forwarding of submissions to parties
Oct 6, 2022
(Electronic) Receipt
Oct 6, 2022
Letter accompanying subsequently filed items
Oct 6, 2022
Letter relating to Appeal Procedure
Jul 22, 2022
Composition of the board (T)
Jul 22, 2022
F3303.16 Change of composition of the Board (T)
Apr 21, 2022
F3345 Forwarding of submissions to parties
Apr 14, 2022
(Electronic) Receipt
Apr 14, 2022
Cited document during appeal procedure
Apr 14, 2022
Cited document during appeal procedure
Apr 14, 2022
Cited document during appeal procedure
Apr 14, 2022
Cited document during appeal procedure
Apr 14, 2022
Cited document during appeal procedure
Apr 14, 2022
Letter accompanying subsequently filed items
Apr 14, 2022
Reply to appeal
Apr 13, 2022
(Electronic) Receipt
Apr 13, 2022
Auxiliary request during appeals procedure - 01
Apr 13, 2022
Auxiliary request during appeals procedure - 01
Apr 13, 2022
Auxiliary request during appeals procedure - 02
Apr 13, 2022
Auxiliary request during appeals procedure - 02
Apr 13, 2022
Auxiliary request during appeals procedure - 03
Apr 13, 2022
Auxiliary request during appeals procedure - 03
Apr 13, 2022
Auxiliary request during appeals procedure - 04
Apr 13, 2022
Auxiliary request during appeals procedure - 04
Apr 13, 2022
Auxiliary request during appeals procedure - 05
Apr 13, 2022
Auxiliary request during appeals procedure - 05
Apr 13, 2022
Auxiliary request during appeals procedure - 06
Apr 13, 2022
Auxiliary request during appeals procedure - 06
Apr 13, 2022
Auxiliary request during appeals procedure - 07
Apr 13, 2022
Auxiliary request during appeals procedure - 07
Apr 13, 2022
Auxiliary request during appeals procedure - 08
Apr 13, 2022
Auxiliary request during appeals procedure - 08
Apr 13, 2022
Auxiliary request during appeals procedure - 09
Apr 13, 2022
Auxiliary request during appeals procedure - 09
Apr 13, 2022
Auxiliary request during appeals procedure - 10
Apr 13, 2022
Auxiliary request during appeals procedure - 10
Apr 13, 2022
Auxiliary request during appeals procedure - 11
Apr 13, 2022
Auxiliary request during appeals procedure - 11
Apr 13, 2022
Letter accompanying subsequently filed items
Apr 13, 2022
Reply to appeal
Dec 10, 2021
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Dec 7, 2021
(Electronic) Receipt
Dec 7, 2021
Cited document during appeal procedure
Dec 7, 2021
Letter accompanying subsequently filed items
Dec 7, 2021
Statement of grounds of appeal
Oct 12, 2021
F3204 Communication of the file number to the parties
Oct 12, 2021
F3204 Communication of the file number to the parties
Oct 5, 2021
(Electronic) Receipt
Oct 5, 2021
Letter accompanying subsequently filed items
Oct 5, 2021
Letter accompanying subsequently filed items
Oct 5, 2021
Notice of appeal
Sep 9, 2021
(Electronic) Receipt
Sep 9, 2021
Advice of delivery
Sep 9, 2021
Letter accompanying subsequently filed items
Sep 8, 2021
Communication about missing advice of delivery
Aug 3, 2021
Advice of delivery
Aug 2, 2021
Annex to the communication - opposition
Aug 2, 2021
Decision of the Opposition Division and instruction
Aug 2, 2021
Decision rejecting the opposition
Aug 2, 2021
Decision rejecting the opposition
Aug 2, 2021
Grounds for the decision (Annex) - opposition
Aug 2, 2021
Means of redress
Aug 2, 2021
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Aug 2, 2021
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Aug 2, 2021
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Aug 2, 2021
Provision of a copy of the minutes - opposition procedure
Aug 2, 2021
Provision of a copy of the minutes - opposition procedure
Aug 2, 2021
Transmittal of decision / summons - opposition
Aug 2, 2021
Transmittal of decision / summons - opposition
Apr 7, 2021
Information about the result of oral proceedings
Mar 31, 2021
Brief communication - Opposition proceedings
Mar 29, 2021
(Electronic) Receipt
Mar 29, 2021
Auxiliary request during Opposition procedure
Mar 29, 2021
Auxiliary request during Opposition procedure
Mar 29, 2021
Auxiliary request during Opposition procedure
Mar 29, 2021
Auxiliary request during Opposition procedure
Mar 29, 2021
Auxiliary request during Opposition procedure
Mar 29, 2021
Auxiliary request during Opposition procedure
Mar 29, 2021
Auxiliary request during Opposition procedure - 01
Mar 29, 2021
Auxiliary request during Opposition procedure - 02
Mar 29, 2021
Auxiliary request during Opposition procedure - 03
Mar 29, 2021
Auxiliary request during Opposition procedure - 04
Mar 29, 2021
Auxiliary request during Opposition procedure - 05
Mar 29, 2021
Auxiliary request during Opposition procedure - 06
Mar 29, 2021
Letter accompanying subsequently filed items
Mar 29, 2021
Written submission in preparation to/during oral proceedings
Mar 22, 2021
Brief communication - Opposition proceedings
Mar 17, 2021
(Electronic) Receipt
Mar 17, 2021
Letter accompanying subsequently filed items
Mar 17, 2021
Written submission in preparation to/during oral proceedings
Feb 10, 2021
Brief communication - Opposition proceedings
Feb 5, 2021
(Electronic) Receipt
Feb 5, 2021
Auxiliary request during Opposition procedure
Feb 5, 2021
Auxiliary request during Opposition procedure
Feb 5, 2021
Auxiliary request during Opposition procedure
Feb 5, 2021
Auxiliary request during Opposition procedure
Feb 5, 2021
Auxiliary request during Opposition procedure
Feb 5, 2021
Auxiliary request during Opposition procedure - 01
Feb 5, 2021
Auxiliary request during Opposition procedure - 02
Feb 5, 2021
Auxiliary request during Opposition procedure - 03
Feb 5, 2021
Auxiliary request during Opposition procedure - 04
Feb 5, 2021
Auxiliary request during Opposition procedure - 05
Feb 5, 2021
Citation in opposition procedure - 021
Feb 5, 2021
Citation in opposition procedure - 022
Feb 5, 2021
Consolidated list of cited opposition documents
Feb 5, 2021
Letter accompanying subsequently filed items
Feb 5, 2021
Written submission in preparation to/during oral proceedings
Jan 29, 2021
Brief communication - Opposition proceedings
Jan 28, 2021
Notification concerning the date of oral proceedings
Jan 28, 2021
Notification concerning the date of oral proceedings
Jan 26, 2021
(Electronic) Receipt
Jan 26, 2021
Request for interpreters during oral proceedings
Apr 3, 2020
Advice of delivery
Mar 31, 2020
Advice of delivery
Mar 27, 2020
Acknowledgement of a document
Mar 27, 2020
Acknowledgement of a document
Mar 27, 2020
Information concerning oral proceedings
Mar 27, 2020
Summons to attend oral proceedings
Mar 27, 2020
Summons to attend oral proceedings
Mar 24, 2020
Brief communication - Opposition proceedings
Mar 24, 2020
Notification concerning the date of oral proceedings
Mar 24, 2020
Notification concerning the date of oral proceedings
Mar 19, 2020
(Electronic) Receipt
Mar 19, 2020
Letter accompanying subsequently filed items
Mar 19, 2020
Oral proceedings: Request for postponement
Feb 13, 2020
Brief communication - Opposition proceedings
Feb 11, 2020
Brief communication - Opposition proceedings
Feb 7, 2020
(Electronic) Receipt
Feb 7, 2020
Authorisation
Feb 7, 2020
Brief communication - Opposition proceedings
Feb 7, 2020
Letter accompanying subsequently filed items
Feb 7, 2020
Request for interpreters during oral proceedings
Feb 6, 2020
(Electronic) Receipt
Feb 6, 2020
Request for interpreters during oral proceedings
Feb 4, 2020
(Electronic) Receipt
Feb 4, 2020
Citation in opposition procedure - 020
Feb 4, 2020
Citation in opposition procedure - 020
Feb 4, 2020
Letter accompanying subsequently filed items
Feb 4, 2020
Written submission in preparation to/during oral proceedings
Jun 21, 2019
Brief communication - Opposition proceedings
Jun 21, 2019
Brief communication - Opposition proceedings
May 3, 2019
Advice of delivery
May 3, 2019
Advice of delivery
Apr 15, 2019
Advice of delivery
Apr 11, 2019
Advice of delivery
Apr 9, 2019
Acknowledgement of a document
Apr 9, 2019
Acknowledgement of a document
Apr 9, 2019
Annex to the communication - opposition
Apr 9, 2019
Information concerning oral proceedings
Apr 9, 2019
Summons to attend oral proceedings
Apr 9, 2019
Summons to attend oral proceedings
Mar 13, 2019
Brief communication - Opposition proceedings
Mar 13, 2019
Communication concerning the filing of a power of attorney
Mar 13, 2019
Communication of amended entries
Mar 7, 2019
(Electronic) Receipt
Mar 7, 2019
Authorisation
Mar 7, 2019
Letter accompanying subsequently filed items
Mar 7, 2019
Letter regarding the opposition procedure (no time limit)
Dec 20, 2018
Brief communication - Opposition proceedings
Dec 13, 2018
(Electronic) Receipt
Dec 13, 2018
Letter accompanying subsequently filed items
Dec 13, 2018
Reply of the patent proprietor to the notice(s) of opposition
Aug 3, 2018
Communication of a notice of opposition and request to file observations
Aug 3, 2018
Notice of further oppositions to opponent(s)
Jul 5, 2018
(Electronic) Receipt
Jul 5, 2018
Citation in opposition procedure - 001
Jul 5, 2018
Citation in opposition procedure - 002
Jul 5, 2018
Citation in opposition procedure - 003
Jul 5, 2018
Citation in opposition procedure - 004
Jul 5, 2018
Citation in opposition procedure - 005
Jul 5, 2018
Citation in opposition procedure - 006
Jul 5, 2018
Citation in opposition procedure - 007
Jul 5, 2018
Citation in opposition procedure - 008
Jul 5, 2018
Citation in opposition procedure - 009
Jul 5, 2018
Citation in opposition procedure - 010
Jul 5, 2018
Citation in opposition procedure - 011
Jul 5, 2018
Citation in opposition procedure - 012
Jul 5, 2018
Citation in opposition procedure - 013
Jul 5, 2018
Citation in opposition procedure - 014
Jul 5, 2018
Citation in opposition procedure - 015
Jul 5, 2018
Citation in opposition procedure - 016
Jul 5, 2018
Citation in opposition procedure - 017
Jul 5, 2018
Citation in opposition procedure - 018
Jul 5, 2018
Citation in opposition procedure - 019
Jul 5, 2018
Citation in opposition procedure - 023
Jul 5, 2018
Citation in opposition procedure - 024
Jul 5, 2018
Citation in opposition procedure - 025
Jul 5, 2018
International publication (Pamphlet)
Jul 5, 2018
Notice of opposition
Jul 5, 2018
Notice of opposition
Oct 26, 2017
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Sep 21, 2017
Decision to grant a European patent
Sep 8, 2017
(Electronic) Receipt
Sep 8, 2017
French translation of claims
Sep 8, 2017
German translation of the claims
Sep 8, 2017
Letter accompanying subsequently filed items
Jun 16, 2017
Bibliographic data of the European patent application
Jun 16, 2017
Communication about intention to grant a European patent
Jun 16, 2017
Intention to grant (signatures)
Jun 16, 2017
Text intended for grant (clean copy)
Jun 16, 2017
Text intended for grant (version for approval)
Feb 15, 2017
CDS Clean up - amended data concerning the representative of the applicant (Association)
Feb 15, 2017
Submission concerning representation
Dec 21, 2016
(Electronic) Receipt
Dec 21, 2016
Letter accompanying subsequently filed items
Dec 21, 2016
Reply to communication from the Examining Division
Sep 1, 2016
Annex to the communication
Sep 1, 2016
Communication from the Examining Division
May 17, 2016
(Electronic) Receipt
May 17, 2016
Letter accompanying subsequently filed items
May 17, 2016
Reply to communication from the Examining Division
Apr 1, 2016
Annex to the communication
Apr 1, 2016
Consultation by telephone/in person (with time limit)
Apr 1, 2016
Result of consultation by telephone/in person
Mar 16, 2016
(Electronic) Receipt
Mar 16, 2016
Amended claims with annotations
Mar 16, 2016
Claims
Mar 16, 2016
Communication of amended entries concerning the representative
Mar 16, 2016
Letter accompanying subsequently filed items
Mar 16, 2016
Reply to communication from the Examining Division
Mar 10, 2016
Submission concerning change of applicant's representative
Mar 3, 2016
CDS Clean up - amended applicant details
Mar 3, 2016
Submission concerning change of applicant's address
Jan 25, 2016
Annex to the communication
Jan 25, 2016
Consultation by telephone/in person (with time limit)
Jan 25, 2016
Result of consultation by telephone/in person
Jan 18, 2016
Examination started
Jun 23, 2015
(Electronic) Receipt
Jun 23, 2015
Letter accompanying subsequently filed items
Jun 23, 2015
Reply to Written Opinion prepared by the EPO
Mar 6, 2015
Invitation to indicate correct address of inventor
Mar 4, 2015
Notification on forthcoming publication of bibliographic data
Mar 3, 2015
Invitation to indicate correct address of inventor
Mar 2, 2015
Letter which had not been notified
Feb 25, 2015
Letter which had not been notified
Jan 13, 2015
Communication concerning correction of deficiencies in written opinion/amendment of application/payment of claims fee
Jan 9, 2015
Communication to designated inventor
Jan 9, 2015
Communication to designated inventor
Jan 9, 2015
Communication to designated inventor
Jan 9, 2015
Communication to designated inventor
Jan 9, 2015
Communication to designated inventor
Jan 9, 2015
Communication to designated inventor
Jan 9, 2015
Communication to designated inventor
Jan 9, 2015
Communication to designated inventor
Jan 6, 2015
Priority search results copy provided by EPO
Dec 2, 2014
Annexes to the international preliminary examination report
Dec 2, 2014
Copy of the international preliminary examination report
Nov 11, 2014
(Electronic) Receipt
Nov 11, 2014
Request for entry into the European phase
Oct 6, 2014
Information on entry into European phase
Jul 17, 2014
Annex to International preliminary examination report
Jul 17, 2014
International preliminary examination report
Jul 17, 2014
International preliminary examination report - free text sheet
Jul 17, 2014
International preliminary examination report - points I-VIII
Jul 17, 2014
Notification of documents sent to WIPO
Jul 17, 2014
Transmittal of International Preliminary Examination Report
Jun 25, 2014
PCT(IPEA): Amended sheet - claims
Jun 25, 2014
PCT(IPEA): Amended sheet - claims
Jun 25, 2014
Reply to communication PCT/IPEA/408
May 6, 2014
Written opinion
May 6, 2014
Written opinion - free text sheet
May 6, 2014
Written opinion - points I-VIII
Mar 20, 2014
Notification of the recording of a change
Mar 20, 2014
Notification of the recording of a change
Mar 20, 2014
Notification of the recording of a change
Mar 3, 2014
Notification of election of EPO
Feb 12, 2014
Notification of receipt of demand
Jan 31, 2014
Letter concerning the designation and/or extension and/or validation of states
Jan 28, 2014
PCT demand form
Jan 28, 2014
PCT(IPEA): Amended sheet - claims
Jan 28, 2014
PCT(IPEA): Amended sheet - claims
Jan 28, 2014
Payment of fees and costs
Jan 28, 2014
Reply to International Search Opinion
Dec 19, 2013
Priority document (electronically transmitted)
Nov 28, 2013
Copy of the international search report
Nov 28, 2013
Published international application - A1
Jun 19, 2013
Written opinion of the ISA, boxes No. I to VIII
Jun 19, 2013
Written opinion of the ISA, cover sheet
Jun 19, 2013
Written opinion of the ISA, supplemental box
Apr 29, 2013
(Electronic) Receipt
Apr 29, 2013
Abstract
Apr 29, 2013
Claims
Apr 29, 2013
Description
Apr 29, 2013
Priority document (RO-procedure)

EP2852622

BASF

Application Number: EP13719540A
Filing Date: Apr 29, 2013
Status: Opposition Rejected; Oct 3, 2025
Publication Date: Oct 18, 2017
External Links: Slate, Register , Google Patents

IP Verse

Inverse Dispersion Comprising A Cationic Polymer And A Stabilizing Agent

Patent Summary

Patent Family

Patent Oppositions

Dossier Documents

EP2852622