IP Verse

Acrylic Acid Polymers Neutralized With Sodium And Calcium Ions And Having A Narrow Molecular Weight Distribution

Patent No. EP3535304 (titled "Acrylic Acid Polymers Neutralized With Sodium And Calcium Ions And Having A Narrow Molecular Weight Distribution") was filed by Basf on Oct 24, 2017. The application was issued on Dec 9, 2020.

Patent Summary

Patent Family

Patent Oppositions (2)

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
OMYA	Sep 9, 2021	MAIWALD
COATEX	Sep 8, 2021	REGIMBEAU

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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Jul 18, 2023
Communication to the parties concerning the termination of the opposition proceedings (opponent)
Jul 18, 2023
Communication to the parties concerning the termination of the opposition proceedings (opponent)
Jul 18, 2023
Communication to the parties concerning the termination of the opposition proceedings (proprietor)
Jul 13, 2023
Termination of the opposition proceedings with revocation of patent
Apr 5, 2023
(Electronic) Receipt
Apr 5, 2023
Advice of delivery
Apr 5, 2023
Letter accompanying subsequently filed items
Apr 4, 2023
Advice of delivery
Apr 4, 2023
Advice of delivery
Apr 3, 2023
Annex to the communication - opposition
Apr 3, 2023
Decision of the Opposition Division and instruction
Apr 3, 2023
Decision revoking the European patent
Apr 3, 2023
Decision revoking the European patent
Apr 3, 2023
Decision revoking the European patent
Apr 3, 2023
Grounds for the decision (Annex) - opposition
Apr 3, 2023
Means of redress
Apr 3, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Apr 3, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Apr 3, 2023
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Apr 3, 2023
Provision of a copy of the minutes - opposition procedure
Apr 3, 2023
Provision of a copy of the minutes - opposition procedure
Apr 3, 2023
Provision of a copy of the minutes - opposition procedure
Apr 3, 2023
Scanned annex to a communication - opposition procedure
Apr 3, 2023
Scanned annex to a communication - opposition procedure
Apr 3, 2023
Scanned annex to a communication - opposition procedure
Apr 3, 2023
Transmittal of decision / summons - opposition
Apr 3, 2023
Transmittal of decision / summons - opposition
Apr 3, 2023
Transmittal of decision / summons - opposition
Feb 23, 2023
Information about the result of oral proceedings
Feb 22, 2023
Consolidated list of cited opposition documents
Feb 3, 2023
(Electronic) Receipt
Feb 3, 2023
Letter regarding the opposition procedure (no time limit)
Jan 30, 2023
Brief communication - Opposition proceedings
Jan 30, 2023
Brief communication - Opposition proceedings
Jan 23, 2023
(Electronic) Receipt
Jan 20, 2023
(Electronic) Receipt
Jan 20, 2023
Letter accompanying subsequently filed items
Jan 20, 2023
Request for interpreters during oral proceedings
Jan 18, 2023
Notification concerning the date of oral proceedings
Jan 18, 2023
Notification concerning the date of oral proceedings
Jan 18, 2023
Notification concerning the date of oral proceedings
Jan 10, 2023
Brief communication - Opposition proceedings
Jan 10, 2023
Brief communication - Opposition proceedings
Jan 4, 2023
Brief communication - Opposition proceedings
Jan 4, 2023
Brief communication - Opposition proceedings
Dec 23, 2022
(Electronic) Receipt
Dec 23, 2022
Any annexes (other than citation) to an opposition letter
Dec 23, 2022
Letter accompanying subsequently filed items
Dec 23, 2022
Written submission in preparation to/during oral proceedings
Dec 22, 2022
Brief communication - Opposition proceedings
Dec 22, 2022
Brief communication - Opposition proceedings
Dec 21, 2022
(Electronic) Receipt
Dec 21, 2022
Letter accompanying subsequently filed items
Dec 21, 2022
Written submission in preparation to/during oral proceedings
Dec 19, 2022
(Electronic) Receipt
Dec 19, 2022
Citation in opposition procedure - 040
Dec 19, 2022
Letter accompanying subsequently filed items
Dec 19, 2022
Written submission in preparation to/during oral proceedings
Nov 18, 2022
Brief communication - Opposition proceedings
Nov 18, 2022
Brief communication - Opposition proceedings
Nov 10, 2022
(Electronic) Receipt
Nov 10, 2022
Citation in opposition procedure - 038
Nov 10, 2022
Citation in opposition procedure - 039
Nov 10, 2022
Letter accompanying subsequently filed items
Nov 10, 2022
Written submission in preparation to/during oral proceedings
Oct 24, 2022
Communication of amended entries
Oct 13, 2022
Request concerning representative opponent
Jul 18, 2022
(Electronic) Receipt
Jul 18, 2022
Advice of delivery
Jul 18, 2022
Letter accompanying subsequently filed items
Jul 15, 2022
Advice of delivery
Jul 15, 2022
Advice of delivery
Jul 14, 2022
Annex to the communication - opposition
Jul 14, 2022
Information concerning oral proceedings
Jul 14, 2022
Summons to attend oral proceedings
Jul 14, 2022
Summons to attend oral proceedings
Jul 14, 2022
Summons to attend oral proceedings
Jul 14, 2022
Transmittal of decision / summons - opposition
Jul 14, 2022
Transmittal of decision / summons - opposition
Jul 14, 2022
Transmittal of decision / summons - opposition
Apr 7, 2022
Brief communication - Opposition proceedings
Apr 7, 2022
Brief communication - Opposition proceedings
Apr 1, 2022
(Electronic) Receipt
Apr 1, 2022
Auxiliary request during Opposition procedure
Apr 1, 2022
Auxiliary request during Opposition procedure
Apr 1, 2022
Auxiliary request during Opposition procedure
Apr 1, 2022
Auxiliary request during Opposition procedure
Apr 1, 2022
Auxiliary request during Opposition procedure
Apr 1, 2022
Auxiliary request during Opposition procedure
Apr 1, 2022
Auxiliary request during Opposition procedure
Apr 1, 2022
Auxiliary request during Opposition procedure
Apr 1, 2022
Auxiliary request during Opposition procedure - 01
Apr 1, 2022
Auxiliary request during Opposition procedure - 02
Apr 1, 2022
Auxiliary request during Opposition procedure - 03
Apr 1, 2022
Auxiliary request during Opposition procedure - 04
Apr 1, 2022
Auxiliary request during Opposition procedure - 05
Apr 1, 2022
Auxiliary request during Opposition procedure - 06
Apr 1, 2022
Auxiliary request during Opposition procedure - 07
Apr 1, 2022
Auxiliary request during Opposition procedure - 08
Apr 1, 2022
Citation in opposition procedure - 037
Apr 1, 2022
Letter accompanying subsequently filed items
Apr 1, 2022
Reply of the patent proprietor to the notice(s) of opposition
Feb 9, 2022
Brief communication - Opposition proceedings
Feb 9, 2022
Brief communication - Opposition proceedings
Feb 3, 2022
(Electronic) Receipt
Feb 3, 2022
Brief communication - Opposition proceedings
Feb 3, 2022
Brief communication - Opposition proceedings
Feb 3, 2022
Grant of extension of time limit (opposition procedure)
Feb 3, 2022
Letter accompanying subsequently filed items
Jan 28, 2022
(Electronic) Receipt
Jan 28, 2022
Letter accompanying subsequently filed items
Jan 28, 2022
Request for extension of time limit
Oct 29, 2021
Brief communication - Opposition proceedings
Oct 29, 2021
Brief communication - Opposition proceedings
Oct 25, 2021
(Electronic) Receipt
Oct 25, 2021
Citation in opposition procedure - 036
Oct 25, 2021
Letter accompanying subsequently filed items
Oct 25, 2021
Letter regarding the opposition procedure (no time limit)
Oct 18, 2021
Brief communication - Opposition proceedings
Oct 18, 2021
Brief communication - Opposition proceedings
Oct 18, 2021
Communication concerning the filing of a power of attorney
Oct 18, 2021
Communication of amended entries concerning the representative
Oct 12, 2021
(Electronic) Receipt
Oct 12, 2021
Letter accompanying subsequently filed items (CDR)
Oct 12, 2021
Submission concerning change of proprietor's representative
Sep 23, 2021
Communication of a notice of opposition and request to file observations
Sep 23, 2021
Notice of further oppositions to opponent(s)
Sep 23, 2021
Notice of further oppositions to opponent(s)
Sep 15, 2021
Communication of a notice of opposition - first information to patent proprietor
Sep 14, 2021
Communication of a notice of opposition - first information to patent proprietor
Sep 9, 2021
(Electronic) Receipt
Sep 9, 2021
Citation in opposition procedure
Sep 9, 2021
Citation in opposition procedure
Sep 9, 2021
Citation in opposition procedure
Sep 9, 2021
Citation in opposition procedure - 016
Sep 9, 2021
Citation in opposition procedure - 017
Sep 9, 2021
Citation in opposition procedure - 018
Sep 9, 2021
Citation in opposition procedure - 019
Sep 9, 2021
Citation in opposition procedure - 020
Sep 9, 2021
Citation in opposition procedure - 021
Sep 9, 2021
Citation in opposition procedure - 021
Sep 9, 2021
Citation in opposition procedure - 022
Sep 9, 2021
Citation in opposition procedure - 023
Sep 9, 2021
Citation in opposition procedure - 024
Sep 9, 2021
Citation in opposition procedure - 025
Sep 9, 2021
Citation in opposition procedure - 026
Sep 9, 2021
Citation in opposition procedure - 027
Sep 9, 2021
Citation in opposition procedure - 028
Sep 9, 2021
Citation in opposition procedure - 029
Sep 9, 2021
Citation in opposition procedure - 030
Sep 9, 2021
Citation in opposition procedure - 031
Sep 9, 2021
Citation in opposition procedure - 032
Sep 9, 2021
Citation in opposition procedure - 033
Sep 9, 2021
Citation in opposition procedure - 034
Sep 9, 2021
Citation in opposition procedure - 035
Sep 9, 2021
Notice of opposition
Sep 9, 2021
Notice of opposition
Sep 8, 2021
(Electronic) Receipt
Sep 8, 2021
(Electronic) Receipt
Sep 8, 2021
Authorisation
Sep 8, 2021
Citation in opposition procedure - 001
Sep 8, 2021
Citation in opposition procedure - 002
Sep 8, 2021
Citation in opposition procedure - 003
Sep 8, 2021
Citation in opposition procedure - 004
Sep 8, 2021
Citation in opposition procedure - 005
Sep 8, 2021
Citation in opposition procedure - 006
Sep 8, 2021
Citation in opposition procedure - 007
Sep 8, 2021
Citation in opposition procedure - 008
Sep 8, 2021
Citation in opposition procedure - 008
Sep 8, 2021
Citation in opposition procedure - 009
Sep 8, 2021
Citation in opposition procedure - 010
Sep 8, 2021
Citation in opposition procedure - 011
Sep 8, 2021
Citation in opposition procedure - 012
Sep 8, 2021
Citation in opposition procedure - 013
Sep 8, 2021
Citation in opposition procedure - 014
Sep 8, 2021
Citation in opposition procedure - 015
Sep 8, 2021
Letter accompanying subsequently filed items
Sep 8, 2021
Notice of opposition
Sep 8, 2021
Notice of opposition
Sep 8, 2021
Request concerning representative opponent
Dec 21, 2020
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Nov 12, 2020
Decision to grant a European patent
Sep 15, 2020
(Electronic) Receipt
Sep 15, 2020
French translation of claims
Sep 15, 2020
German translation of the claims
Sep 15, 2020
Letter accompanying subsequently filed items
Jul 28, 2020
Communication confirming withdrawal from representation
Jul 23, 2020
Submission concerning change of applicant's representative
Jul 14, 2020
Bibliographic data of the European patent application
Jul 14, 2020
Communication about intention to grant a European patent
Jul 14, 2020
Intention to grant (signatures)
Jul 14, 2020
Text intended for grant (clean copy)
Jul 14, 2020
Text intended for grant (version for approval)
Jun 9, 2020
Examination started
Dec 27, 2019
(Electronic) Receipt
Dec 27, 2019
Amended claims filed after receipt of (European) search report
Dec 27, 2019
Amended claims with annotations
Dec 27, 2019
Amendments received before examination
Dec 27, 2019
Letter accompanying subsequently filed items
Aug 14, 2019
Notification on forthcoming publication of bibliographic data
Aug 6, 2019
Invitation to indicate correct address of inventor
Jul 31, 2019
Letter which had not been notified
Jun 14, 2019
Communication concerning correction of deficiencies in written opinion/amendment of application/payment of claims fee
Jun 12, 2019
Communication to designated inventor
Jun 12, 2019
Communication to designated inventor
Jun 12, 2019
Communication to designated inventor
Jun 12, 2019
Communication to designated inventor
Jun 12, 2019
Communication to designated inventor
Jun 12, 2019
Communication to designated inventor
Jun 12, 2019
Communication to designated inventor
May 23, 2019
(Electronic) Receipt
May 23, 2019
Request for entry into the European phase
May 21, 2019
Copy of the international preliminary report on patentability
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
May 2, 2019
Notification of the recording of a change
Mar 15, 2019
Information on entry into European phase
Jan 16, 2019
Notification of the recording of a change
Jan 16, 2019
Notification of the recording of a change
May 28, 2018
Priority document (electronically transmitted)
May 11, 2018
Copy of the international search report
May 11, 2018
Published international application - A1
Jan 15, 2018
Incoming letter related to PCT RO
Jan 3, 2018
Written opinion of the ISA, boxes No. I to VIII
Jan 3, 2018
Written opinion of the ISA, cover sheet
Jan 3, 2018
Written opinion of the ISA, supplemental box
Nov 16, 2017
Notification of the international application number and of the international filing date
Oct 24, 2017
(Electronic) Receipt
Oct 24, 2017
Abstract
Oct 24, 2017
Claims
Oct 24, 2017
Description
Oct 24, 2017
Document concerning fees and payments
Oct 24, 2017
Electronic request for grant of an International application

EP3535304

BASF

Application Number: EP17794933A
Filing Date: Oct 24, 2017
Status: Revoked; Jul 14, 2023
Publication Date: Dec 9, 2020
External Links: Slate, Register , Google Patents