Kraft Cooking Method Using Polysulfide Cooking Liquor

Patent No. EP2751331 (titled "Kraft Cooking Method Using Polysulfide Cooking Liquor") was filed by Valmet Aktiebolag on Aug 30, 2011. The application was issued on Apr 22, 2020.

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
ANDRITZ	Mar 14, 2018	AWA SWEDEN

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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Mar 26, 2020
Decision to maintain the European patent in amended form
Mar 26, 2020
Decision to maintain the European patent in amended form
Mar 24, 2020
Refund of fees
Mar 20, 2020
Termination of the opposition proceedings with maintenance of patent
Mar 13, 2020
(Electronic) Receipt
Mar 13, 2020
Filing of the translation of the amended claims
Mar 13, 2020
French translation of claims
Mar 13, 2020
German translation of the claims
Jan 13, 2020
Document concerning representation
Dec 16, 2019
Maintenance of the patent with the documents specified in the final decision
Jul 29, 2019
Advice of delivery
Jul 29, 2019
Advice of delivery
Jul 23, 2019
Advice of delivery
Jul 22, 2019
Acknowledgement of a document
Jul 22, 2019
Acknowledgement of a document
Jul 22, 2019
Annex to the communication - opposition
Jul 22, 2019
Decision of the Opposition Division and instruction
Jul 22, 2019
Druckexemplar in opposition procedure
Jul 22, 2019
Grounds for the decision (Annex) - opposition
Jul 22, 2019
Interlocutory decision in opposition proceedings
Jul 22, 2019
Internal form - Opposition/addressees
Jul 22, 2019
Internal form - Opposition/addressees
Jul 22, 2019
Means of redress
Jul 22, 2019
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Jul 22, 2019
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Jul 22, 2019
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Jul 22, 2019
Provision of a copy of the minutes - opposition procedure
Jul 22, 2019
Scanned annex to a communication - opposition procedure
Jun 5, 2019
Information about the result of oral proceedings
Apr 10, 2019
Brief communication - Opposition proceedings
Apr 10, 2019
Brief communication - Opposition proceedings
Apr 8, 2019
Brief communication - Opposition proceedings
Apr 5, 2019
(Electronic) Receipt
Apr 5, 2019
(Electronic) Receipt
Apr 5, 2019
Any annexes (other than citation) to an opposition letter
Apr 5, 2019
Letter accompanying subsequently filed items
Apr 5, 2019
Letter regarding the opposition procedure (no time limit)
Apr 5, 2019
Written submission in preparation to/during oral proceedings
Apr 5, 2019
Written submission in preparation to/during oral proceedings
Apr 4, 2019
Brief communication - Opposition proceedings
Apr 3, 2019
(Electronic) Receipt
Apr 3, 2019
Letter accompanying subsequently filed items
Apr 3, 2019
Request for interpreters during oral proceedings
Apr 1, 2019
Written submission in preparation to/during oral proceedings
Dec 11, 2018
Advice of delivery
Dec 10, 2018
Advice of delivery
Dec 6, 2018
Advice of delivery
Dec 4, 2018
Advice of delivery
Dec 3, 2018
Acknowledgement of a document
Dec 3, 2018
Acknowledgement of a document
Dec 3, 2018
Annex to the communication - opposition
Dec 3, 2018
Information concerning oral proceedings
Dec 3, 2018
Summons to attend oral proceedings
Dec 3, 2018
Summons to attend oral proceedings
Aug 10, 2018
Brief communication - Opposition proceedings
Aug 3, 2018
(Electronic) Receipt
Aug 3, 2018
Amended claims with annotations
Aug 3, 2018
Amended claims with annotations
Aug 3, 2018
Amended claims with annotations
Aug 3, 2018
Claims
Aug 3, 2018
Claims
Aug 3, 2018
Claims
Aug 3, 2018
Letter regarding the opposition procedure (no time limit)
Aug 3, 2018
Reply of the patent proprietor to the notice(s) of opposition
Jul 31, 2018
Brief communication - Opposition proceedings
Jul 31, 2018
Rejection of request for extension of time limit
Jul 25, 2018
(Electronic) Receipt
Jul 25, 2018
Letter regarding the opposition procedure (no time limit)
Jul 25, 2018
Request for extension of time limit
Jun 1, 2018
Brief communication - Opposition proceedings
Jun 1, 2018
Communication of amended entries
May 17, 2018
Request concerning representative opponent
Mar 27, 2018
Communication of a notice of opposition and request to file observations
Mar 27, 2018
Notice of further oppositions to opponent(s)
Mar 20, 2018
Communication of a notice of opposition - first information to patent proprietor
Mar 14, 2018
(Electronic) Receipt
Mar 14, 2018
Non-patent literature cited during the opposition procedure
Mar 14, 2018
Non-patent literature cited during the opposition procedure
Mar 14, 2018
Non-patent literature cited during the opposition procedure
Mar 14, 2018
Non-patent literature cited during the opposition procedure
Mar 14, 2018
Non-patent literature cited during the opposition procedure
Mar 14, 2018
Non-patent literature cited during the opposition procedure
Mar 14, 2018
Non-patent literature cited during the opposition procedure
Mar 14, 2018
Notice of opposition
Mar 14, 2018
Notice of opposition
Mar 14, 2018
Patent document cited during the opposition procedure
Mar 14, 2018
Patent document cited during the opposition procedure
Jun 15, 2017
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
May 18, 2017
Decision to grant a European patent
May 4, 2017
(Electronic) Receipt
May 4, 2017
Filing of the translations of the claims
May 4, 2017
French translation of claims
May 4, 2017
German translation of the claims
Mar 10, 2017
Bibliographic data of the European patent application
Mar 10, 2017
Communication about intention to grant a European patent
Mar 10, 2017
Intention to grant (signatures)
Mar 10, 2017
Text intended for grant (clean copy)
Mar 10, 2017
Text intended for grant (version for approval)
Oct 10, 2016
(Electronic) Receipt
Oct 10, 2016
Amended description with annotations
Oct 10, 2016
Description
Oct 10, 2016
Letter accompanying subsequently filed items
Oct 10, 2016
Reply to communication from the Examining Division
Jul 22, 2016
Annex to the communication
Jul 22, 2016
Communication from the Examining Division
Apr 25, 2016
(Electronic) Receipt
Apr 25, 2016
Amended description with annotations
Apr 25, 2016
Description
Apr 25, 2016
Letter accompanying subsequently filed items
Apr 25, 2016
Reply to communication from the Examining Division
Mar 15, 2016
Annex to the communication
Mar 15, 2016
Communication from the Examining Division
Mar 9, 2016
Examination started
Jun 22, 2015
(Electronic) Receipt
Jun 22, 2015
Maintenance of the application
Jun 11, 2015
(Electronic) Receipt
Jun 11, 2015
Amended claims filed after receipt of (European) search report
Jun 11, 2015
Amended claims with annotations
Jun 11, 2015
Amendments received before examination
Jun 11, 2015
Letter accompanying subsequently filed items
May 7, 2015
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Apr 16, 2015
Communication regarding the transmission of the European search report
Apr 16, 2015
European search opinion
Apr 16, 2015
Supplementary European search report
Apr 14, 2015
Communication concerning the filing of a power of attorney
Apr 14, 2015
Communication of amended entries concerning the representative
Apr 1, 2015
Search started
Mar 26, 2015
(Electronic) Receipt
Mar 26, 2015
Letter accompanying subsequently filed items
Jun 12, 2014
Notification on forthcoming publication of bibliographic data
Apr 10, 2014
Communication regarding possible amendment of the application/payment of claims fee
Apr 8, 2014
Communication to designated inventor
Apr 8, 2014
Communication to designated inventor
Mar 21, 2014
(Electronic) Receipt
Mar 21, 2014
Abstract
Mar 21, 2014
Amended claims filed after receipt of (European) search report
Mar 21, 2014
Amended description filed after receipt of (European) search report
Mar 21, 2014
Reply to Written Opinion prepared by the EPO
Mar 21, 2014
Request for entry into the European phase
Mar 18, 2014
Annexes to the international preliminary examination report
Mar 18, 2014
Copy of the international preliminary examination report
Mar 6, 2014
Notification of the recording of a change
Jan 10, 2014
Information on entry into European phase
May 24, 2013
Notification of election of EPO
May 13, 2013
Notification of the recording of a change
Mar 7, 2013
Copy of the international search report
Mar 7, 2013
Published international application - A1

EP2751331

VALMET AKTIEBOLAG

Application Number: EP11871390A
Filing Date: Aug 30, 2011
Status: Patent Maintained As Amended; Mar 20, 2020
Publication Date: Apr 22, 2020
External Links: Slate, EP2751331B2, Google Patents

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Kraft Cooking Method Using Polysulfide Cooking Liquor

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Dossier Documents

EP2751331