Polyolefin Production With Chromium-Based Catalysts

Patent No. EP3188834 (titled "Polyolefin Production With Chromium-Based Catalysts") was filed by Univation on Sep 1, 2015. The application was issued on Feb 17, 2021.

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
CHEVRON PHILLIPS CHEMICAL LP	Nov 15, 2021	PRIVETT

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 15, 2025
Refund of fees
Oct 14, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Oct 14, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Oct 14, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Oct 14, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Oct 9, 2025
F3014 Oral Proceedings: Order cancelling/postponing
Oct 8, 2025
(Electronic) Receipt
Oct 8, 2025
Letter accompanying subsequently filed items
Oct 8, 2025
Withdrawal of an appeal
Aug 13, 2025
F3345 Forwarding of submissions to parties
Aug 12, 2025
(Electronic) Receipt
Aug 12, 2025
Letter accompanying subsequently filed items
Aug 12, 2025
Request for interpreters during oral proceedings
Jul 8, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Jul 8, 2025
F3305 Communication of the Board of Appeal (ex parte/ inter partes)
Jul 1, 2025
F3011.2 Oral Proceedings: Summons VICO
Jul 1, 2025
F3011.2 Oral Proceedings: Summons VICO
Jun 30, 2025
F3056 Communication: Change of Board due to the technical nature of the appeal
Jun 30, 2025
F3056 Communication: Change of Board due to the technical nature of the appeal
Jun 26, 2025
F3010 Oral proceedings: order for summons
Jun 26, 2025
F3303.17 Change of the composition of the Board (T), in case Chairman is a legal member
Jun 26, 2025
F3313 Order: change of Board due to the technical aspects of the appeal
Mar 19, 2024
F3345 Forwarding of submissions to parties
Mar 15, 2024
(Electronic) Receipt
Mar 15, 2024
Letter accompanying subsequently filed items
Mar 15, 2024
Reply to appeal
Nov 29, 2023
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Nov 24, 2023
(Electronic) Receipt
Nov 24, 2023
Annexes (other than cited documents) regarding appeal procedure
Nov 24, 2023
Annexes (other than cited documents) regarding appeal procedure
Nov 24, 2023
Letter accompanying subsequently filed items
Nov 24, 2023
Statement of grounds of appeal
Sep 19, 2023
F3204 Communication of the file number to the parties
Sep 19, 2023
F3204 Communication of the file number to the parties
Sep 13, 2023
(Electronic) Receipt
Sep 13, 2023
Letter accompanying subsequently filed items
Sep 13, 2023
Notice of appeal
Jul 28, 2023
(Electronic) Receipt
Jul 28, 2023
Advice of delivery
Jul 19, 2023
Brief communication - Opposition proceedings
Jul 19, 2023
Communication of amended entries
Jul 17, 2023
Annex to the communication - opposition
Jul 17, 2023
Decision of the Opposition Division and instruction
Jul 17, 2023
Decision rejecting the opposition
Jul 17, 2023
Decision rejecting the opposition
Jul 17, 2023
Grounds for the decision (Annex) - opposition
Jul 17, 2023
Means of redress
Jul 17, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Jul 17, 2023
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Jul 17, 2023
Provision of a copy of the minutes - opposition procedure
Jul 17, 2023
Provision of a copy of the minutes - opposition procedure
Jul 17, 2023
Transmittal of decision / summons - opposition
Jul 17, 2023
Transmittal of decision / summons - opposition
Jul 12, 2023
Letter accompanying subsequently filed items
May 23, 2023
Information about the result of oral proceedings
Mar 22, 2023
Brief communication - Opposition proceedings
Mar 16, 2023
(Electronic) Receipt
Mar 16, 2023
Brief communication - Opposition proceedings
Mar 16, 2023
Letter accompanying subsequently filed items
Mar 16, 2023
Written submission in preparation to/during oral proceedings
Mar 15, 2023
(Electronic) Receipt
Mar 15, 2023
Any annexes (other than citation) to an opposition letter
Mar 15, 2023
Letter accompanying subsequently filed items
Mar 15, 2023
Written submission in preparation to/during oral proceedings
Mar 14, 2023
Brief communication - Opposition proceedings
Mar 10, 2023
(Electronic) Receipt
Mar 10, 2023
Letter accompanying subsequently filed items
Mar 10, 2023
Written submission in preparation to/during oral proceedings
Mar 8, 2023
(Electronic) Receipt
Mar 8, 2023
Any annexes (other than citation) to an opposition letter
Mar 8, 2023
Letter accompanying subsequently filed items
Mar 8, 2023
Request for interpreters during oral proceedings
Feb 24, 2023
(Electronic) Receipt
Feb 23, 2023
Notification concerning the date of oral proceedings
Feb 23, 2023
Notification concerning the date of oral proceedings
Nov 3, 2022
(Electronic) Receipt
Nov 3, 2022
Advice of delivery
Nov 3, 2022
Letter accompanying subsequently filed items
Oct 17, 2022
Summons to attend oral proceedings
Oct 17, 2022
Summons to attend oral proceedings
Oct 17, 2022
Transmittal of decision / summons - opposition
Oct 17, 2022
Transmittal of decision / summons - opposition
Oct 13, 2022
Brief communication - Opposition proceedings
Oct 5, 2022
(Electronic) Receipt
Oct 5, 2022
Any annexes (other than citation) to an opposition letter
Oct 5, 2022
Any annexes (other than citation) to an opposition letter
Oct 5, 2022
Letter accompanying subsequently filed items
Oct 5, 2022
Oral proceedings: Request for postponement
Oct 4, 2022
Annex to the communication - opposition
Oct 4, 2022
Scanned annex to a communication - opposition procedure
Oct 4, 2022
Summons to attend oral proceedings
Oct 4, 2022
Summons to attend oral proceedings
Oct 4, 2022
Transmittal of decision / summons - opposition
Oct 4, 2022
Transmittal of decision / summons - opposition
Apr 8, 2022
Communication of amended entries
Apr 4, 2022
Brief communication - Opposition proceedings
Apr 1, 2022
Letter accompanying subsequently filed items
Apr 1, 2022
Request concerning representative opponent
Mar 30, 2022
(Electronic) Receipt
Mar 30, 2022
Letter accompanying subsequently filed items
Mar 30, 2022
Reply of the patent proprietor to the notice(s) of opposition
Mar 27, 2022
Request concerning representative opponent
Dec 1, 2021
Communication of a notice of opposition and request to file observations
Dec 1, 2021
Notice of further oppositions to opponent(s)
Nov 19, 2021
Communication of a notice of opposition - first information to patent proprietor
Nov 15, 2021
(Electronic) Receipt
Nov 15, 2021
Citation in opposition procedure - 001
Nov 15, 2021
Citation in opposition procedure - 002
Nov 15, 2021
Citation in opposition procedure - 003
Nov 15, 2021
Citation in opposition procedure - 004
Nov 15, 2021
Citation in opposition procedure - 005
Nov 15, 2021
Citation in opposition procedure - 006
Nov 15, 2021
Citation in opposition procedure - 007
Nov 15, 2021
Citation in opposition procedure - 008
Nov 15, 2021
Citation in opposition procedure - 009
Nov 15, 2021
Citation in opposition procedure - 010
Nov 15, 2021
Citation in opposition procedure - 011
Nov 15, 2021
Citation in opposition procedure - 012
Nov 15, 2021
Consolidated list of cited opposition documents
Nov 15, 2021
Letter accompanying subsequently filed items
Nov 15, 2021
Notice of opposition
Nov 15, 2021
Notice of opposition
Nov 15, 2021
Notice of opposition
Mar 1, 2021
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Jan 21, 2021
Decision to grant a European patent
Jan 6, 2021
(Electronic) Receipt
Jan 6, 2021
Filing of the translations of the claims
Jan 6, 2021
French translation of claims
Jan 6, 2021
German translation of the claims
Jan 6, 2021
Letter accompanying subsequently filed items
Sep 2, 2020
Bibliographic data of the European patent application
Sep 2, 2020
Communication about intention to grant a European patent
Sep 2, 2020
Intention to grant (signatures)
Sep 2, 2020
Text intended for grant (clean copy)
Sep 2, 2020
Text intended for grant (version for approval)
Jul 14, 2020
(Electronic) Receipt
Jul 14, 2020
Amended description with annotations
Jul 14, 2020
Description
Jul 14, 2020
Letter accompanying subsequently filed items
Jul 14, 2020
Reply to communication from the Examining Division
Jun 12, 2020
Annex to the communication
Jun 12, 2020
Communication from the Examining Division
Jun 5, 2020
Examination started
Oct 21, 2019
Submission concerning representation
Mar 11, 2019
Submission concerning representation
Jul 3, 2018
Submission concerning representation
Oct 17, 2017
(Electronic) Receipt
Oct 17, 2017
Letter accompanying subsequently filed items
Oct 17, 2017
Reply to Written Opinion prepared by the EPO
Jun 20, 2017
(Electronic) Receipt
Jun 20, 2017
Letter accompanying subsequently filed items
Jun 20, 2017
Submission concerning representation
Jun 14, 2017
Notification on forthcoming publication of bibliographic data
May 11, 2017
Communication confirming withdrawal from representation
May 11, 2017
Communication of amended entries concerning the representative
Apr 19, 2017
(Electronic) Receipt
Apr 19, 2017
Letter accompanying subsequently filed items
Apr 19, 2017
Submission concerning change of applicant's representative
Apr 19, 2017
Submission concerning change of applicant's representative
Apr 11, 2017
Communication regarding comments on written opinion/amendment of application/payment of claims fee
Apr 7, 2017
Communication to designated inventor
Apr 7, 2017
Communication to designated inventor
Apr 7, 2017
Communication to designated inventor
Apr 7, 2017
Communication to designated inventor
Mar 29, 2017
Submission concerning change of applicant's representative
Mar 27, 2017
(Electronic) Receipt
Mar 27, 2017
Amended claims filed after receipt of (European) search report
Mar 27, 2017
Amended claims with annotations
Mar 27, 2017
Request for entry into the European phase
Mar 7, 2017
Annexes to the international preliminary examination report
Mar 7, 2017
Copy of the international preliminary examination report
Jan 13, 2017
Information on entry into European phase
Dec 9, 2016
Annex to International preliminary examination report
Dec 9, 2016
International preliminary examination report
Dec 9, 2016
International preliminary examination report - free text sheet
Dec 9, 2016
International preliminary examination report - points I-VIII
Dec 9, 2016
Transmittal of International Preliminary Examination Report
Sep 20, 2016
Amendments of documents (Article 19 PCT) (without attachments)
Aug 16, 2016
Written opinion
Aug 16, 2016
Written opinion - free text sheet
Aug 16, 2016
Written opinion - points I-VIII
Jul 5, 2016
Notification of receipt of demand
Jun 22, 2016
Document concerning fees and payments
Jun 22, 2016
Letter regarding PCTII procedure
Jun 22, 2016
PCT demand form
Jun 22, 2016
PCT(IPEA): Amended sheet - claims
Jun 22, 2016
PCT(IPEA): Amended sheet - claims
Jun 22, 2016
Payment of fees and costs
Jun 22, 2016
Reply to International Search Opinion
Jun 22, 2016
Submission concerning representation
Mar 30, 2016
Priority document (electronically transmitted)
Mar 10, 2016
Copy of the international search report
Mar 10, 2016
Published international application - A1
Nov 13, 2015
ISR: cited documents
Nov 12, 2015
Written opinion of the ISA, boxes No. I to VIII
Nov 12, 2015
Written opinion of the ISA, cover sheet
Nov 12, 2015
Written opinion of the ISA, supplemental box
Sep 22, 2015
Notification of receipt of Search copy
Sep 7, 2015
Abstract
Sep 7, 2015
Annex
Sep 7, 2015
Claims
Sep 7, 2015
Description
Sep 7, 2015
Drawings
Sep 7, 2015
Fee calculation sheet for an international application
Sep 7, 2015
Incoming letter related to ISA procedure
Sep 7, 2015
Notification Concerning Payment of Prescribed Fees (copy for ISA/EP)
Sep 7, 2015
Notification of the International Application Number and of the International Filing Date (copy for ISA/EP)
Sep 7, 2015
Request form for international application (copy for ISA/EP)

EP3188834

UNIVATION

Application Number: EP15760621A
Filing Date: Sep 1, 2015
Status: Granted And Under Opposition; Jan 15, 2021
Publication Date: Feb 17, 2021
External Links: Slate, Register , Google Patents

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Polyolefin Production With Chromium-Based Catalysts

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Dossier Documents

EP3188834