IP Verse

Method For Purifying Composition Comprising Antibodies With Anionic Polymer

Patent No. EP3330279 (titled "Method For Purifying Composition Comprising Antibodies With Anionic Polymer") was filed by Chugai Seiyaku Kabushiki Kaisha on Jul 29, 2016. The application was issued on Apr 6, 2022.

Patent Summary

Patent Family

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
NEUEFEIND	Jan 5, 2023	MAIWALD

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

Get instant alerts for new documents

Aug 25, 2025
Communication to the parties concerning termination of the opposition proceedings - opposition rejected - no appeal lodged
Aug 25, 2025
Communication to the parties concerning the termination of the opposition proceedings (opponent)
May 21, 2025
Brief communication - Opposition proceedings
May 21, 2025
Brief communication - Opposition proceedings
May 21, 2025
Decision of the Opposition Division and instruction
May 21, 2025
Decision rejecting the opposition
May 21, 2025
Decision rejecting the opposition
May 21, 2025
Grounds for the decision (Annex) - opposition
May 21, 2025
Means of redress
May 21, 2025
Scanned annex to a communication - opposition procedure
Apr 22, 2025
Notification concerning the date of oral proceedings
Apr 22, 2025
Notification concerning the date of oral proceedings
Apr 17, 2025
(Electronic) Receipt
Apr 17, 2025
Letter accompanying subsequently filed items
Apr 17, 2025
Written submission in preparation to/during oral proceedings
Apr 15, 2025
Brief communication - Opposition proceedings
Apr 14, 2025
(Electronic) Receipt
Apr 14, 2025
Withdrawal of a request for oral proceedings
Nov 13, 2024
Annex to the communication - opposition
Nov 13, 2024
Information concerning oral proceedings
Nov 13, 2024
Scanned annex to a communication - opposition procedure
Nov 13, 2024
Summons to attend oral proceedings
Nov 13, 2024
Summons to attend oral proceedings
Jun 12, 2023
Brief communication - Opposition proceedings
Jun 6, 2023
(Electronic) Receipt
Jun 6, 2023
Letter regarding the opposition procedure (no time limit)
Jun 5, 2023
Brief communication - Opposition proceedings
Jun 5, 2023
Request for documents
May 30, 2023
(Electronic) Receipt
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure
May 30, 2023
Auxiliary request during Opposition procedure - 01
May 30, 2023
Auxiliary request during Opposition procedure - 02
May 30, 2023
Auxiliary request during Opposition procedure - 03
May 30, 2023
Auxiliary request during Opposition procedure - 04
May 30, 2023
Auxiliary request during Opposition procedure - 05
May 30, 2023
Auxiliary request during Opposition procedure - 06
May 30, 2023
Auxiliary request during Opposition procedure - 07
May 30, 2023
Auxiliary request during Opposition procedure - 08
May 30, 2023
Auxiliary request during Opposition procedure - 09
May 30, 2023
Auxiliary request during Opposition procedure - 10
May 30, 2023
Auxiliary request during Opposition procedure - 11
May 30, 2023
Citation in opposition procedure
May 30, 2023
Citation in opposition procedure - 007
May 30, 2023
Citation in opposition procedure - 008
May 30, 2023
Citation in opposition procedure - 009
May 30, 2023
Citation in opposition procedure - 010
May 30, 2023
Consolidated list of cited opposition documents
May 30, 2023
Letter accompanying subsequently filed items
May 30, 2023
Main request during Opposition procedure
May 30, 2023
Reply of the patent proprietor to the notice(s) of opposition
Feb 2, 2023
Brief communication - Opposition proceedings
Jan 30, 2023
(Electronic) Receipt
Jan 30, 2023
Letter accompanying subsequently filed items
Jan 30, 2023
Request concerning the applicant/representative
Jan 20, 2023
Communication of a notice of opposition and request to file observations
Jan 20, 2023
Notice of further oppositions to opponent(s)
Jan 12, 2023
Communication of a notice of opposition - first information to patent proprietor
Jan 5, 2023
(Electronic) Receipt
Jan 5, 2023
Citation in opposition procedure
Jan 5, 2023
Citation in opposition procedure
Jan 5, 2023
Citation in opposition procedure - 001
Jan 5, 2023
Citation in opposition procedure - 002
Jan 5, 2023
Citation in opposition procedure - 003
Jan 5, 2023
Citation in opposition procedure - 004
Jan 5, 2023
Citation in opposition procedure - 005
Jan 5, 2023
Citation in opposition procedure - 006
Jan 5, 2023
Notice of opposition
Jan 5, 2023
Notice of opposition
Apr 21, 2022
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Mar 11, 2022
Decision to grant a European patent
Feb 24, 2022
(Electronic) Receipt
Feb 24, 2022
Filing of the translations of the claims
Feb 24, 2022
Letter accompanying subsequently filed items
Oct 27, 2021
Bibliographic data of the European patent application
Oct 27, 2021
Communication about intention to grant a European patent
Oct 27, 2021
Intention to grant (signatures)
Oct 27, 2021
Text intended for grant (clean copy)
Oct 27, 2021
Text intended for grant (sequence listing)
Oct 27, 2021
Text intended for grant (version for approval)
Sep 3, 2021
(Electronic) Receipt
Sep 3, 2021
Amended claims with annotations
Sep 3, 2021
Claims
Sep 3, 2021
French translation of claims
Sep 3, 2021
German translation of the claims
Sep 3, 2021
Letter accompanying subsequently filed items
Sep 3, 2021
Request for correction/amendment of the text proposed for grant sent from 01.04.2012
Apr 23, 2021
Bibliographic data of the European patent application
Apr 23, 2021
Communication about intention to grant a European patent
Apr 23, 2021
Intention to grant (signatures)
Apr 23, 2021
Text intended for grant (clean copy)
Apr 23, 2021
Text intended for grant (sequence listing)
Apr 23, 2021
Text intended for grant (version for approval)
Apr 1, 2021
Annex to the communication
Apr 1, 2021
Consultation by telephone/in person
Apr 1, 2021
Notification concerning the date of oral proceedings
Apr 1, 2021
Result of consultation by telephone/in person
Mar 31, 2021
(Electronic) Receipt
Mar 31, 2021
Amended description with annotations
Mar 31, 2021
Description
Mar 31, 2021
Letter accompanying subsequently filed items
Mar 31, 2021
Letter dealing with oral proceedings
Mar 8, 2021
(Electronic) Receipt
Mar 8, 2021
Amended claims with annotations
Mar 8, 2021
Amended description with annotations
Mar 8, 2021
Claims
Mar 8, 2021
Description
Mar 8, 2021
Letter accompanying subsequently filed items
Mar 8, 2021
Letter dealing with oral proceedings
Sep 25, 2020
Annex to the communication
Sep 25, 2020
Consultation by telephone/in person
Sep 25, 2020
Result of consultation by telephone/in person
Aug 28, 2020
Annex to the communication
Aug 28, 2020
Summons to attend oral proceedings
May 8, 2020
(Electronic) Receipt
May 8, 2020
Letter accompanying subsequently filed items
May 8, 2020
Reply to communication from the Examining Division
Mar 18, 2020
Grant of extension of time limit (examination procedure)
Mar 9, 2020
Request for extension of time limit to communication from the Examining Division
Nov 6, 2019
Annex to the communication
Nov 6, 2019
Communication from the Examining Division
Oct 24, 2019
Examination started
Jun 28, 2019
Amended claims filed after receipt of (European) search report
Jun 28, 2019
Amended claims with annotations
Jun 28, 2019
Amendments received before examination
Dec 18, 2018
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Nov 30, 2018
Communication regarding the transmission of the European search report
Nov 30, 2018
European search opinion
Nov 30, 2018
Information on Search Strategy
Nov 30, 2018
Supplementary European search report
Nov 9, 2018
Search started
May 9, 2018
Notification of forthcoming publication
Mar 7, 2018
Communication regarding possible amendment of the application/payment of claims fee
Mar 5, 2018
Communication to designated inventor
Mar 5, 2018
Communication to designated inventor
Feb 21, 2018
Copy of the international preliminary report on patentability
Feb 21, 2018
Translation of the international preliminary report on patentability
Feb 8, 2018
(Electronic) Receipt
Feb 8, 2018
Abstract
Feb 8, 2018
Amended claims filed after receipt of (European) search report
Feb 8, 2018
Amended claims with annotations
Feb 8, 2018
Claims
Feb 8, 2018
Converted Sequence Listing
Feb 8, 2018
Description
Feb 8, 2018
Drawings
Feb 8, 2018
Request for entry into the European phase
Dec 13, 2017
Information on entry into European phase
Mar 1, 2017
Priority document (electronically transmitted)
Feb 9, 2017
Converted Sequence Listing
Feb 9, 2017
Copy of the international search report
Feb 9, 2017
Copy of the translated international search report
Feb 9, 2017
International publication pamphlet

EP3330279

CHUGAI SEIYAKU KABUSHIKI KAISHA

Application Number: EP16832930A
Filing Date: Jul 29, 2016
Status: Opposition Rejected; Aug 22, 2025
Publication Date: Apr 6, 2022
External Links: Slate, Register , Google Patents