Biodegradable Polyester Composition

Patent No. EP3260495 (titled "Biodegradable Polyester Composition") was filed by Yang on Feb 24, 2017. The application was issued on Apr 7, 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
BASF	Jan 7, 2022	MEISSNER BOLTE PARTNERSCHAFT MBB
NOVAMONT	Jan 7, 2022	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

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Sep 10, 2025
Refund of fees
Sep 4, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Sep 4, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Sep 4, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
Sep 4, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Sep 4, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Sep 4, 2025
F3324 Closure of the appeal proceedings: withdrawal of the appeal/ application/ opposition
Sep 3, 2025
F3014 Oral Proceedings: Order cancelling/postponing
Aug 13, 2025
F3345 Forwarding of submissions to parties
Aug 13, 2025
F3345 Forwarding of submissions to parties
Aug 13, 2025
F3345 Forwarding of submissions to parties
Aug 13, 2025
F3345 Forwarding of submissions to parties
Aug 11, 2025
F3345 Forwarding of submissions to parties
Aug 11, 2025
F3345 Forwarding of submissions to parties
Aug 8, 2025
(Electronic) Receipt
Aug 8, 2025
(Electronic) Receipt
Aug 8, 2025
Letter accompanying subsequently filed items
Aug 8, 2025
Letter dealing with oral proceedings during the appeal procedure
Aug 8, 2025
Withdrawal of an opposition
Aug 6, 2025
(Electronic) Receipt
Aug 6, 2025
Request for interpreters during oral proceedings
Jul 23, 2025
F3004 Communication of the Registry
Jul 23, 2025
F3004 Communication of the Registry
Jul 23, 2025
F3004 Communication of the Registry
Jul 8, 2025
F3345 Forwarding of submissions to parties
Jul 8, 2025
F3345 Forwarding of submissions to parties
Jul 7, 2025
(Electronic) Receipt
Jul 7, 2025
Letter accompanying subsequently filed items
Jul 7, 2025
Letter dealing with oral proceedings during the appeal procedure
May 14, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
May 14, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
May 14, 2025
F3017 Oral Proceedings: Notification of cancellation/postponing
May 13, 2025
F3014 Oral Proceedings: Order cancelling/postponing
May 13, 2025
F3345 Forwarding of submissions to parties
May 13, 2025
F3345 Forwarding of submissions to parties
May 12, 2025
(Electronic) Receipt
May 12, 2025
Annexes (other than cited documents) regarding appeal procedure
May 12, 2025
Annexes (other than cited documents) regarding appeal procedure
May 12, 2025
Letter accompanying subsequently filed items
May 12, 2025
Oral proceedings: Request for postponement
May 7, 2025
F3011.1 Oral Proceedings: summons
May 7, 2025
F3011.1 Oral Proceedings: summons
May 7, 2025
F3011.1 Oral Proceedings: summons
May 7, 2025
F3350 Communication regarding oral proceedings (art. 15 Rules of Procedure of the Boards of Appeal)
May 6, 2025
F3010 Oral proceedings: order for summons
Oct 1, 2024
F3345 Forwarding of submissions to parties
Oct 1, 2024
F3345 Forwarding of submissions to parties
Sep 26, 2024
(Electronic) Receipt
Sep 26, 2024
Letter accompanying subsequently filed items
Sep 26, 2024
Letter relating to Appeal Procedure
Jul 17, 2024
F3345 Forwarding of submissions to parties
Jul 17, 2024
F3345 Forwarding of submissions to parties
Jul 12, 2024
(Electronic) Receipt
Jul 12, 2024
Amended claims with annotations
Jul 12, 2024
Amended claims with annotations
Jul 12, 2024
Amended claims with annotations
Jul 12, 2024
Amended claims with annotations
Jul 12, 2024
Amended claims with annotations
Jul 12, 2024
Amended claims with annotations
Jul 12, 2024
Amended claims with annotations
Jul 12, 2024
Auxiliary request during appeals procedure - 01
Jul 12, 2024
Auxiliary request during appeals procedure - 02
Jul 12, 2024
Auxiliary request during appeals procedure - 03
Jul 12, 2024
Auxiliary request during appeals procedure - 04
Jul 12, 2024
Auxiliary request during appeals procedure - 05
Jul 12, 2024
Auxiliary request during appeals procedure - 06
Jul 12, 2024
Auxiliary request during appeals procedure - 07
Jul 12, 2024
Cited document during appeal procedure
Jul 12, 2024
Letter accompanying subsequently filed items
Jul 12, 2024
Reply to appeal
Mar 22, 2024
F3345 Forwarding of submissions to parties
Mar 22, 2024
F3345 Forwarding of submissions to parties
Mar 13, 2024
Letter accompanying subsequently filed items
Mar 13, 2024
Request for change of opponent's representative
Mar 12, 2024
F3344 Setting time limit for reply/ file observations to appeal (inter partes)
Mar 12, 2024
F3345 Forwarding of submissions to parties
Mar 5, 2024
(Electronic) Receipt
Mar 5, 2024
Cited document during appeal procedure
Mar 5, 2024
Cited document during appeal procedure
Mar 5, 2024
Cited document during appeal procedure
Mar 5, 2024
Cited document during appeal procedure
Mar 5, 2024
Letter accompanying subsequently filed items
Mar 5, 2024
Statement of grounds of appeal
Feb 28, 2024
Refund of fees
Feb 23, 2024
F3345 Forwarding of submissions to parties
Feb 23, 2024
F3345 Forwarding of submissions to parties
Feb 22, 2024
Composition of the board (T)
Feb 21, 2024
(Electronic) Receipt
Feb 21, 2024
Letter accompanying subsequently filed items
Feb 21, 2024
Withdrawal of an appeal
Jan 10, 2024
F3204 Communication of the file number to the parties
Jan 10, 2024
F3204 Communication of the file number to the parties
Jan 10, 2024
F3204 Communication of the file number to the parties
Jan 5, 2024
(Electronic) Receipt
Jan 5, 2024
F3204 Communication of the file number to the parties
Jan 5, 2024
F3204 Communication of the file number to the parties
Jan 5, 2024
F3204 Communication of the file number to the parties
Jan 5, 2024
Letter accompanying subsequently filed items
Jan 5, 2024
Notice of appeal
Dec 22, 2023
(Electronic) Receipt
Dec 22, 2023
Letter accompanying subsequently filed items
Dec 22, 2023
Notice of appeal
Oct 27, 2023
Advice of delivery
Oct 26, 2023
Advice of delivery
Oct 26, 2023
Annex to the communication - opposition
Oct 26, 2023
Decision rejecting the opposition
Oct 26, 2023
Decision rejecting the opposition
Oct 26, 2023
Decision rejecting the opposition
Oct 26, 2023
Grounds for the decision (Annex) - opposition
Oct 26, 2023
Means of redress
Oct 26, 2023
Minutes of the oral proceedings (Opposition Division) - conclusion of the proceedings
Oct 26, 2023
Minutes of the oral proceedings (Opposition Division) - introduction of the parties
Oct 26, 2023
Provision of a copy of the minutes - opposition procedure
Oct 26, 2023
Provision of a copy of the minutes - opposition procedure
Oct 26, 2023
Provision of a copy of the minutes - opposition procedure
Oct 26, 2023
Scanned annex to a communication - opposition procedure
Oct 26, 2023
Transmittal of decision / summons - opposition
Oct 26, 2023
Transmittal of decision / summons - opposition
Oct 26, 2023
Transmittal of decision / summons - opposition
Oct 24, 2023
Decision of the Opposition Division and instruction
Sep 26, 2023
Information about the result of oral proceedings
Aug 1, 2023
Brief communication - Opposition proceedings
Aug 1, 2023
Brief communication - Opposition proceedings
Aug 1, 2023
Brief communication - Opposition proceedings
Aug 1, 2023
Brief communication - Opposition proceedings
Jul 27, 2023
Brief communication - Opposition proceedings
Jul 27, 2023
Brief communication - Opposition proceedings
Jul 26, 2023
(Electronic) Receipt
Jul 26, 2023
Citation in opposition procedure - 034
Jul 26, 2023
Consolidated list of cited opposition documents
Jul 26, 2023
Letter accompanying subsequently filed items
Jul 26, 2023
Written submission in preparation to/during oral proceedings
Jul 21, 2023
(Electronic) Receipt
Jul 21, 2023
Auxiliary request during Opposition procedure
Jul 21, 2023
Auxiliary request during Opposition procedure
Jul 21, 2023
Auxiliary request during Opposition procedure
Jul 21, 2023
Auxiliary request during Opposition procedure
Jul 21, 2023
Auxiliary request during Opposition procedure
Jul 21, 2023
Auxiliary request during Opposition procedure
Jul 21, 2023
Auxiliary request during Opposition procedure - 01
Jul 21, 2023
Auxiliary request during Opposition procedure - 02
Jul 21, 2023
Auxiliary request during Opposition procedure - 03
Jul 21, 2023
Auxiliary request during Opposition procedure - 04
Jul 21, 2023
Auxiliary request during Opposition procedure - 05
Jul 21, 2023
Auxiliary request during Opposition procedure - 06
Jul 21, 2023
Letter accompanying subsequently filed items
Jul 21, 2023
Written submission in preparation to/during oral proceedings
Jul 20, 2023
(Electronic) Receipt
Jul 20, 2023
Letter accompanying subsequently filed items
Jul 20, 2023
Request for interpreters during oral proceedings
Mar 22, 2023
Brief communication - Opposition proceedings
Mar 22, 2023
Brief communication - Opposition proceedings
Mar 14, 2023
(Electronic) Receipt
Mar 14, 2023
Citation in opposition procedure - 032
Mar 14, 2023
Citation in opposition procedure - 033
Mar 14, 2023
Letter accompanying subsequently filed items
Mar 14, 2023
Written submission in preparation to/during oral proceedings
Feb 3, 2023
Notification concerning the date of oral proceedings
Feb 3, 2023
Notification concerning the date of oral proceedings
Feb 3, 2023
Notification concerning the date of oral proceedings
Oct 31, 2022
Advice of delivery
Oct 31, 2022
Advice of delivery
Oct 28, 2022
Advice of delivery
Oct 28, 2022
Information concerning oral proceedings
Oct 28, 2022
Notification concerning the date of oral proceedings
Oct 28, 2022
Notification concerning the date of oral proceedings
Oct 28, 2022
Notification concerning the date of oral proceedings
Oct 28, 2022
Summons to attend oral proceedings
Oct 28, 2022
Summons to attend oral proceedings
Oct 28, 2022
Summons to attend oral proceedings
Oct 28, 2022
Transmittal of decision / summons - opposition
Oct 28, 2022
Transmittal of decision / summons - opposition
Oct 28, 2022
Transmittal of decision / summons - opposition
Oct 26, 2022
Brief communication - Opposition proceedings
Oct 26, 2022
Brief communication - Opposition proceedings
Oct 25, 2022
Brief communication - Opposition proceedings
Oct 25, 2022
Brief communication - Opposition proceedings
Oct 24, 2022
Communication of amended entries
Oct 19, 2022
(Electronic) Receipt
Oct 19, 2022
Any annexes (other than citation) to an opposition letter
Oct 19, 2022
Any annexes (other than citation) to an opposition letter
Oct 19, 2022
Letter accompanying subsequently filed items
Oct 19, 2022
Oral proceedings: Request for postponement
Oct 13, 2022
Request concerning representative opponent
Oct 11, 2022
Advice of delivery
Oct 11, 2022
Advice of delivery
Oct 10, 2022
Advice of delivery
Oct 10, 2022
Annex to the communication - opposition
Oct 10, 2022
Information concerning oral proceedings
Oct 10, 2022
Scanned annex to a communication - opposition procedure
Oct 10, 2022
Summons to attend oral proceedings
Oct 10, 2022
Summons to attend oral proceedings
Oct 10, 2022
Summons to attend oral proceedings
Oct 10, 2022
Transmittal of decision / summons - opposition
Oct 10, 2022
Transmittal of decision / summons - opposition
Oct 10, 2022
Transmittal of decision / summons - opposition
Jun 8, 2022
Communication for party to proceedings/third party
Jun 8, 2022
Communication for party to proceedings/third party
May 31, 2022
(Electronic) Receipt
May 31, 2022
Auxiliary request during Opposition procedure
May 31, 2022
Auxiliary request during Opposition procedure
May 31, 2022
Auxiliary request during Opposition procedure - 01
May 31, 2022
Auxiliary request during Opposition procedure - 02
May 31, 2022
Citation in opposition procedure - 029
May 31, 2022
Citation in opposition procedure - 030
May 31, 2022
Citation in opposition procedure - 031
May 31, 2022
Letter accompanying subsequently filed items
May 31, 2022
Reply of the patent proprietor to the notice(s) of opposition
Mar 25, 2022
Brief communication - Opposition proceedings
Mar 25, 2022
Brief communication - Opposition proceedings
Mar 25, 2022
Communication concerning the filing of a power of attorney
Mar 25, 2022
Communication of amended entries concerning the representative
Feb 25, 2022
(Electronic) Receipt
Feb 25, 2022
General authorisation
Feb 25, 2022
Letter accompanying subsequently filed items
Feb 25, 2022
Submission concerning change of proprietor's representative
Jan 24, 2022
(Electronic) Receipt
Jan 24, 2022
Citation in opposition procedure - 004
Jan 24, 2022
Citation in opposition procedure - 006
Jan 24, 2022
Citation in opposition procedure - 007
Jan 24, 2022
Citation in opposition procedure - 008
Jan 24, 2022
Letter regarding the opposition procedure (no time limit)
Jan 21, 2022
Communication of a notice of opposition and request to file observations
Jan 21, 2022
Notice of further oppositions to opponent(s)
Jan 21, 2022
Notice of further oppositions to opponent(s)
Jan 13, 2022
Brief communication in opposition procedure - time limit
Jan 13, 2022
Communication of a notice of opposition - first information to patent proprietor
Jan 7, 2022
(Electronic) Receipt
Jan 7, 2022
(Electronic) Receipt
Jan 7, 2022
Citation in opposition procedure
Jan 7, 2022
Citation in opposition procedure
Jan 7, 2022
Citation in opposition procedure
Jan 7, 2022
Citation in opposition procedure
Jan 7, 2022
Citation in opposition procedure
Jan 7, 2022
Citation in opposition procedure
Jan 7, 2022
Citation in opposition procedure
Jan 7, 2022
Citation in opposition procedure - 001
Jan 7, 2022
Citation in opposition procedure - 002
Jan 7, 2022
Citation in opposition procedure - 003
Jan 7, 2022
Citation in opposition procedure - 005
Jan 7, 2022
Citation in opposition procedure - 009
Jan 7, 2022
Citation in opposition procedure - 010
Jan 7, 2022
Citation in opposition procedure - 011
Jan 7, 2022
Citation in opposition procedure - 012
Jan 7, 2022
Citation in opposition procedure - 013
Jan 7, 2022
Citation in opposition procedure - 014
Jan 7, 2022
Citation in opposition procedure - 014
Jan 7, 2022
Citation in opposition procedure - 015
Jan 7, 2022
Citation in opposition procedure - 016
Jan 7, 2022
Citation in opposition procedure - 017
Jan 7, 2022
Citation in opposition procedure - 018
Jan 7, 2022
Citation in opposition procedure - 019
Jan 7, 2022
Citation in opposition procedure - 020
Jan 7, 2022
Citation in opposition procedure - 021
Jan 7, 2022
Citation in opposition procedure - 022
Jan 7, 2022
Citation in opposition procedure - 023
Jan 7, 2022
Citation in opposition procedure - 024
Jan 7, 2022
Citation in opposition procedure - 025
Jan 7, 2022
Citation in opposition procedure - 026
Jan 7, 2022
Citation in opposition procedure - 027
Jan 7, 2022
Citation in opposition procedure - 027
Jan 7, 2022
Citation in opposition procedure - 027
Jan 7, 2022
Citation in opposition procedure - 027
Jan 7, 2022
Citation in opposition procedure - 027
Jan 7, 2022
Citation in opposition procedure - 027
Jan 7, 2022
Citation in opposition procedure - 028
Jan 7, 2022
Citation in opposition procedure - 028
Jan 7, 2022
Citation in opposition procedure - 028
Jan 7, 2022
Citation in opposition procedure - 028
Jan 7, 2022
Notice of opposition
Jan 7, 2022
Notice of opposition
Jan 7, 2022
Notice of opposition
Jan 7, 2022
Notice of opposition
Apr 20, 2021
Transmission of the certificate for a European patent pursuant to Rule 74 EPC
Mar 12, 2021
Decision to grant a European patent
Feb 10, 2021
(Electronic) Receipt
Feb 10, 2021
Filing of the translations of the claims
Feb 10, 2021
Letter accompanying subsequently filed items
Nov 20, 2020
Bibliographic data of the European patent application
Nov 20, 2020
Communication about intention to grant a European patent
Nov 20, 2020
Intention to grant (signatures)
Nov 20, 2020
Text intended for grant (clean copy)
Nov 20, 2020
Text intended for grant (version for approval)
Oct 12, 2020
(Electronic) Receipt
Oct 12, 2020
Amended description with annotations
Oct 12, 2020
Description
Oct 12, 2020
French translation of claims
Oct 12, 2020
German translation of the claims
Oct 12, 2020
Letter accompanying subsequently filed items
Oct 12, 2020
Request for correction/amendment of the text proposed for grant sent from 01.04.2012
Jul 6, 2020
Bibliographic data of the European patent application
Jul 6, 2020
Communication about intention to grant a European patent
Jul 6, 2020
Intention to grant (signatures)
Jul 6, 2020
Text intended for grant (clean copy)
Jul 6, 2020
Text intended for grant (version for approval)
Mar 29, 2020
(Electronic) Receipt
Mar 29, 2020
Amended description with annotations
Mar 29, 2020
Description
Mar 29, 2020
Letter accompanying subsequently filed items
Mar 29, 2020
Reply to communication from the Examining Division
Dec 16, 2019
Annex to the communication
Dec 16, 2019
Communication from the Examining Division
Dec 10, 2019
Examination started
Aug 5, 2019
(Electronic) Receipt
Aug 5, 2019
Letter accompanying subsequently filed items
Aug 5, 2019
Priority search results
Aug 5, 2019
Reply to invitation to file a copy of priority search results
Jun 6, 2019
Invitation to file a copy of search results(priority)
May 24, 2019
(Electronic) Receipt
May 24, 2019
Amended claims filed after receipt of (European) search report
May 24, 2019
Amended claims with annotations
May 24, 2019
Amendments received before examination
May 24, 2019
Letter accompanying subsequently filed items
Jan 8, 2019
Invitation to declare maintenance of the application and to correct deficiencies in the Written Opinion/amend application
Dec 14, 2018
Communication regarding the transmission of the European search report
Dec 14, 2018
European search opinion
Dec 14, 2018
Information on Search Strategy
Dec 14, 2018
Supplementary European search report
Nov 21, 2018
Search started
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Oct 12, 2018
Communication to designated inventor
Sep 26, 2018
Copy of the international preliminary report on patentability
Sep 26, 2018
Translation of the international preliminary report on patentability
Aug 21, 2018
Translation of the international preliminary report on patentability
Aug 21, 2018
Transmission of a document (International preliminary examination report)
Jul 9, 2018
Copy of the international preliminary report on patentability
Jul 9, 2018
Transmission of a document (International preliminary examination report)
Jun 25, 2018
Enquiry with the International Bureau
Nov 29, 2017
Notification of forthcoming publication
Oct 17, 2017
Communication regarding possible amendment of the application/payment of claims fee
Oct 2, 2017
Priority document (electronically transmitted)
Sep 20, 2017
(Electronic) Receipt
Sep 20, 2017
Abstract
Sep 20, 2017
Amended claims filed after receipt of (European) search report
Sep 20, 2017
Amended description filed after receipt of (European) search report
Sep 20, 2017
Amended description with annotations
Sep 20, 2017
Claims
Sep 20, 2017
Description
Sep 20, 2017
Matter concerning the application
Sep 20, 2017
Request for entry into the European phase
Sep 14, 2017
Copy of the international search report
Sep 14, 2017
Copy of the translated international search report
Sep 14, 2017
International publication pamphlet

EP3260495

YANG

Application Number: EP17762457A
Filing Date: Feb 24, 2017
Status: Opposition Rejected; Sep 5, 2025
Publication Date: Apr 7, 2021
External Links: Slate, Register , Google Patents

IP Verse

Biodegradable Polyester Composition

Patent Summary

Patent Family

Patent Oppositions (2)

Dossier Documents

EP3260495