Methods For Controlling Dual Catalyst Olefin Polymerizations

Patent No. EP2897993 (titled "Methods For Controlling Dual Catalyst Olefin Polymerizations") was filed by Chevron Phillips Chemical LP on Sep 16, 2013. The application was issued on Mar 29, 2023.

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
TOTALENERGIES ONETECH	Dec 19, 2023	DE CLERCQ & PARTNERS

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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Sep 8, 2025
Communication to the parties concerning termination of the opposition proceedings - opposition rejected - no appeal lodged
Sep 8, 2025
Communication to the parties concerning the termination of the opposition proceedings (opponent)
Jun 2, 2025
Annex to the communication - opposition
Jun 2, 2025
Brief communication - Opposition proceedings
Jun 2, 2025
Brief communication - Opposition proceedings
Jun 2, 2025
Decision of the Opposition Division and instruction
Jun 2, 2025
Decision rejecting the opposition
Jun 2, 2025
Decision rejecting the opposition
Jun 2, 2025
Grounds for the decision (Annex) - opposition
Jun 2, 2025
Means of redress
Jun 2, 2025
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Jun 2, 2025
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Jun 2, 2025
Provision of a copy of the minutes - opposition procedure
Jun 2, 2025
Provision of a copy of the minutes - opposition procedure
Jun 2, 2025
Scanned annex to a communication - opposition procedure
Apr 29, 2025
Information about the result of oral proceedings
Apr 25, 2025
Brief communication - Opposition proceedings
Apr 23, 2025
(Electronic) Receipt
Apr 23, 2025
Auxiliary request during Opposition procedure
Apr 23, 2025
Auxiliary request during Opposition procedure
Apr 23, 2025
Auxiliary request during Opposition procedure
Apr 23, 2025
Auxiliary request during Opposition procedure
Apr 23, 2025
Auxiliary request during Opposition procedure
Apr 23, 2025
Auxiliary request during Opposition procedure
Apr 23, 2025
Auxiliary request during Opposition procedure - 14
Apr 23, 2025
Auxiliary request during Opposition procedure - 15
Apr 23, 2025
Auxiliary request during Opposition procedure - 16
Apr 23, 2025
Auxiliary request during Opposition procedure - 17
Apr 23, 2025
Auxiliary request during Opposition procedure - 18
Apr 23, 2025
Auxiliary request during Opposition procedure - 19
Apr 23, 2025
Citation in opposition procedure - 006
Apr 23, 2025
Consolidated list of cited opposition documents
Apr 23, 2025
Letter accompanying subsequently filed items
Apr 23, 2025
Written submission in preparation to/during oral proceedings
Apr 8, 2025
Brief communication - Opposition proceedings
Apr 7, 2025
(Electronic) Receipt
Apr 7, 2025
Letter accompanying subsequently filed items
Apr 7, 2025
Written submission in preparation to/during oral proceedings
Apr 1, 2025
Brief communication - Opposition proceedings
Mar 31, 2025
(Electronic) Receipt
Mar 31, 2025
Letter accompanying subsequently filed items
Mar 31, 2025
Written submission in preparation to/during oral proceedings
Mar 28, 2025
Notification concerning the date of oral proceedings
Mar 6, 2025
Brief communication - Opposition proceedings
Mar 5, 2025
Brief communication - Opposition proceedings
Feb 28, 2025
(Electronic) Receipt
Feb 28, 2025
(Electronic) Receipt
Feb 28, 2025
(Electronic) Receipt
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure
Feb 28, 2025
Auxiliary request during Opposition procedure - 01
Feb 28, 2025
Auxiliary request during Opposition procedure - 02
Feb 28, 2025
Auxiliary request during Opposition procedure - 03
Feb 28, 2025
Auxiliary request during Opposition procedure - 04
Feb 28, 2025
Auxiliary request during Opposition procedure - 05
Feb 28, 2025
Auxiliary request during Opposition procedure - 06
Feb 28, 2025
Auxiliary request during Opposition procedure - 07
Feb 28, 2025
Auxiliary request during Opposition procedure - 08
Feb 28, 2025
Auxiliary request during Opposition procedure - 09
Feb 28, 2025
Auxiliary request during Opposition procedure - 10
Feb 28, 2025
Auxiliary request during Opposition procedure - 11
Feb 28, 2025
Auxiliary request during Opposition procedure - 12
Feb 28, 2025
Auxiliary request during Opposition procedure - 13
Feb 28, 2025
Letter accompanying subsequently filed items
Feb 28, 2025
Letter accompanying subsequently filed items
Feb 28, 2025
Letter accompanying subsequently filed items
Feb 28, 2025
Written submission in preparation to/during oral proceedings
Feb 28, 2025
Written submission in preparation to/during oral proceedings
Feb 28, 2025
Written submission in preparation to/during oral proceedings
Aug 12, 2024
Annex to the communication - opposition
Aug 12, 2024
Information concerning oral proceedings
Aug 12, 2024
Scanned annex to a communication - opposition procedure
Aug 12, 2024
Summons to attend oral proceedings
Aug 12, 2024
Summons to attend oral proceedings
May 17, 2024
Brief communication - Opposition proceedings
May 13, 2024
(Electronic) Receipt
May 13, 2024
Auxiliary request during Opposition procedure
May 13, 2024
Auxiliary request during Opposition procedure
May 13, 2024
Auxiliary request during Opposition procedure
May 13, 2024
Auxiliary request during Opposition procedure - 01
May 13, 2024
Auxiliary request during Opposition procedure - 02
May 13, 2024
Auxiliary request during Opposition procedure - 03
May 13, 2024
Letter accompanying subsequently filed items
May 13, 2024
Reply of the patent proprietor to the notice(s) of opposition
Feb 21, 2024
Brief communication - Opposition proceedings
Feb 21, 2024
Communication concerning the filing of a power of attorney
Feb 21, 2024
Communication of amended entries concerning the representative
Feb 15, 2024
(Electronic) Receipt
Feb 15, 2024
Authorisation
Feb 15, 2024
Letter accompanying subsequently filed items
Feb 15, 2024
Submission concerning change of proprietor's representative
Jan 16, 2024
Communication of a notice of opposition and request to file observations
Jan 16, 2024
Notice of further oppositions to opponent(s)
Dec 22, 2023
Communication of a notice of opposition - first information to patent proprietor
Dec 19, 2023
(Electronic) Receipt
Dec 19, 2023
Citation in opposition procedure - 001
Dec 19, 2023
Citation in opposition procedure - 002
Dec 19, 2023
Citation in opposition procedure - 003
Dec 19, 2023
Citation in opposition procedure - 004
Dec 19, 2023
Citation in opposition procedure - 005
Dec 19, 2023
Letter regarding the opposition procedure (no time limit)
Dec 19, 2023
Notice of opposition
Dec 19, 2023
Notice of opposition
Apr 13, 2023
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Mar 2, 2023
Decision to grant a European patent
Jan 12, 2023
(Electronic) Receipt
Jan 12, 2023
Filing of the translations of the claims
Jan 12, 2023
French translation of claims
Jan 12, 2023
German translation of the claims
Oct 11, 2022
Annex to the communication about intention to grant a European patent
Oct 11, 2022
Bibliographic data of the European patent application
Oct 11, 2022
Communication about intention to grant a European patent
Oct 11, 2022
Intention to grant (signatures)
Oct 11, 2022
Text intended for grant (clean copy)
Oct 11, 2022
Text intended for grant (version for approval)
Sep 30, 2022
Bibliographic data of the European patent application
Sep 28, 2022
Document concerning representation
Dec 3, 2021
(Electronic) Receipt
Dec 3, 2021
Amended claims with annotations
Dec 3, 2021
Amended description with annotations
Dec 3, 2021
Claims
Dec 3, 2021
Description
Dec 3, 2021
Letter accompanying subsequently filed items
Dec 3, 2021
Reply to communication from the Examining Division
Oct 27, 2021
Annex to the communication
Oct 27, 2021
Communication from the Examining Division
Apr 25, 2019
Submission concerning representation
Jan 14, 2019
(Electronic) Receipt
Jan 14, 2019
Letter accompanying subsequently filed items
Jan 14, 2019
Non-patent literature cited during the examination procedure
Jan 14, 2019
Reply to communication from the Examining Division
Sep 3, 2018
Annex to the communication
Sep 3, 2018
Communication from the Examining Division
Feb 5, 2018
Communication of amended entries concerning the representative
Jan 30, 2018
Submission concerning change of applicant's representative
Dec 22, 2017
(Electronic) Receipt
Dec 22, 2017
Letter accompanying subsequently filed items
Dec 22, 2017
Reply to communication from the Examining Division
Aug 16, 2017
Annex to the communication
Aug 16, 2017
Communication from the Examining Division
Aug 9, 2017
Examination started
Apr 18, 2017
Notification regarding date of start of examination with possibility to withdraw
Oct 30, 2015
Communication to designated inventor
Oct 22, 2015
(Electronic) Receipt
Oct 22, 2015
Amended claims filed after receipt of (European) search report
Oct 22, 2015
Amended claims with annotations
Oct 22, 2015
Amendments received before examination
Oct 22, 2015
Letter accompanying subsequently filed items
Oct 22, 2015
Letter concerning the inventor
Jul 1, 2015
Notification on forthcoming publication of bibliographic data
Jun 10, 2015
Invitation to indicate correct address of inventor
Jun 2, 2015
Letter which had not been notified
May 29, 2015
Request for correction of obvious mistakes allowed
May 6, 2015
Communication concerning correction of deficiencies in written opinion/amendment of application/payment of claims fee
Apr 30, 2015
Communication to designated inventor
Apr 30, 2015
Communication to designated inventor
Apr 30, 2015
Communication to designated inventor
Apr 30, 2015
Communication to designated inventor
Apr 24, 2015
(Electronic) Receipt
Apr 24, 2015
Annex
Apr 24, 2015
Letter accompanying subsequently filed items
Apr 24, 2015
Request for correction of errors in filed documents
Apr 8, 2015
Copy of the international preliminary report on patentability
Mar 31, 2015
(Electronic) Receipt
Mar 31, 2015
Request for entry into the European phase
Jan 30, 2015
Information on entry into European phase
Apr 14, 2014
Priority document (electronically transmitted)
Mar 27, 2014
Copy of the international search report
Mar 27, 2014
Published international application - A1
Nov 20, 2013
Written opinion of the ISA, boxes No. I to VIII
Nov 20, 2013
Written opinion of the ISA, cover sheet
Nov 20, 2013
Written opinion of the ISA, supplemental box
Sep 26, 2013
Abstract
Sep 26, 2013
Claims
Sep 26, 2013
Description
Sep 26, 2013
Drawings

EP2897993

CHEVRON PHILLIPS CHEMICAL LP

Application Number: EP13766865A
Filing Date: Sep 16, 2013
Status: Opposition Rejected; Sep 5, 2025
Publication Date: Mar 29, 2023
External Links: Slate, Register , Google Patents

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Methods For Controlling Dual Catalyst Olefin Polymerizations

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Dossier Documents

EP2897993