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The patent EP3319949 was granted to Celanese on Jul 22, 2020. The application was filed on Sep 14, 2017 under application number EP17772252A. The patent is currently recorded with a legal status of "Revoked".

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 | Opposition Status |
|---|---|---|---|
| ANHUI JINHE INDUSTRIAL | Apr 22, 2021 | COHAUSZ & FLORACK | ADMISSIBLE |
| HAMMER | Apr 22, 2021 | GRUNECKER PATENT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US5744010 |
| DESCRIPTION | US9024016 |
| INTERNATIONAL-SEARCH-REPORT | DE3531357 |
| INTERNATIONAL-SEARCH-REPORT | EP0155634 |
| INTERNATIONAL-SEARCH-REPORT | EP0159516 |
| INTERNATIONAL-SEARCH-REPORT | EP0215347 |
| INTERNATIONAL-SEARCH-REPORT | EP0218076 |
| INTERNATIONAL-SEARCH-REPORT | WO2013182651 |
| OPPOSITION | DE3531357 |
| OPPOSITION | US4804755 |
| OPPOSITION | US4806639 |
| OPPOSITION | US5744010 |
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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(Electronic) Receipt
Appeal
Nov 5, 2024
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Oct 14, 2024
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Oct 9, 2024
(Electronic) Receipt
Appeal
Oct 9, 2024
Oct 9, 2024
Claims
Appeal
Oct 9, 2024
Oct 9, 2024
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Nov 28, 2023
(Electronic) Receipt
Appeal
Nov 28, 2023
Nov 14, 2023
Nov 14, 2023
Nov 7, 2023
(Electronic) Receipt
Appeal
Nov 7, 2023
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Nov 6, 2023
Advice of delivery
Appeal
Oct 26, 2023
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(Electronic) Receipt
Appeal
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Appeal
Apr 17, 2023
Claims
Appeal
Apr 17, 2023
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Appeal
Apr 17, 2023
Claims
Appeal
Apr 17, 2023
Claims
Appeal
Apr 17, 2023
Claims
Appeal
Apr 17, 2023
Claims
Appeal
Apr 17, 2023
Claims
Appeal
Apr 17, 2023
Apr 17, 2023
Reply to appeal
Appeal
Dec 6, 2022
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Dec 3, 2022
Nov 28, 2022
(Electronic) Receipt
Appeal
Nov 28, 2022
Nov 28, 2022
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(Electronic) Receipt
Appeal
Nov 17, 2022
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Sep 28, 2022
(Electronic) Receipt
Appeal
Sep 28, 2022
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Notice of appeal
Appeal
Sep 26, 2022
(Electronic) Receipt
Appeal
Sep 26, 2022
Sep 26, 2022
Notice of appeal
Appeal
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Means of redress
OPPO
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Aug 3, 2020
Jun 25, 2020
Decision to grant a European patent
Search/Exam
Jun 16, 2020
(Electronic) Receipt
Search/Exam
Jun 16, 2020
Filing of the translations of the claims
Search/Exam
Jun 16, 2020
French translation of claims
Search/Exam
Jun 16, 2020
German translation of the claims
Search/Exam
Jun 16, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 11, 2020
Feb 11, 2020
Feb 11, 2020
Intention to grant (signatures)
Search/Exam
Feb 11, 2020
Text intended for grant (clean copy)
Search/Exam
Feb 11, 2020
Dec 9, 2019
(Electronic) Receipt
Search/Exam
Dec 9, 2019
Amended claims with annotations
Search/Exam
Dec 9, 2019
Amended description with annotations
Search/Exam
Dec 9, 2019
Claims
Search/Exam
Dec 9, 2019
Description
Search/Exam
Dec 9, 2019
Letter accompanying subsequently filed items
Search/Exam
Dec 9, 2019
Sep 17, 2019
Annex to the communication
Search/Exam
Sep 17, 2019
Communication from the Examining Division
Search/Exam
Aug 7, 2019
(Electronic) Receipt
Search/Exam
Aug 7, 2019
Amended claims with annotations
Search/Exam
Aug 7, 2019
Claims
Search/Exam
Aug 7, 2019
Letter accompanying subsequently filed items
Search/Exam
Aug 7, 2019
Apr 11, 2019
Mar 29, 2019
Annex to the communication
Search/Exam
Mar 29, 2019
Communication from the Examining Division
Search/Exam
Feb 13, 2019
(Electronic) Receipt
Search/Exam
Feb 13, 2019
Amended claims with annotations
Search/Exam
Feb 13, 2019
Claims
Search/Exam
Feb 13, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 13, 2019
Oct 12, 2018
Annex to the communication
Search/Exam
Oct 12, 2018
Communication from the Examining Division
Search/Exam
Oct 8, 2018
Examination started
Search/Exam
May 25, 2018
(Electronic) Receipt
Search/Exam
May 25, 2018
May 25, 2018
Amended claims with annotations
Search/Exam
May 25, 2018
Amendments received before examination
Search/Exam
May 25, 2018
Letter accompanying subsequently filed items
Search/Exam
Apr 18, 2018
Apr 18, 2018
Mar 29, 2018
Mar 29, 2018
Copy of the international search report
Search/Exam
Mar 29, 2018
Mar 29, 2018
Published international application - A1
Search/Exam
Jan 31, 2018
(Electronic) Receipt
Search/Exam
Jan 31, 2018
Letter accompanying subsequently filed items
Search/Exam
Jan 31, 2018
Letter concerning the inventor
Search/Exam
Jan 31, 2018
Notification of the recording of a change
Search/Exam
Dec 15, 2017
Dec 6, 2017
Nov 30, 2017
Nov 28, 2017
Communication to designated inventor
Search/Exam
Nov 28, 2017
Communication to designated inventor
Search/Exam
Nov 28, 2017
Communication to designated inventor
Search/Exam
Nov 27, 2017
Nov 9, 2017
ISR: cited documents
PCTISA
Nov 8, 2017
Nov 8, 2017
Nov 8, 2017
Oct 25, 2017
(Electronic) Receipt
Search/Exam
Oct 25, 2017
Annex
Search/Exam
Oct 25, 2017
Annex
Search/Exam
Oct 25, 2017
Annex
Search/Exam
Oct 25, 2017
Annex
Search/Exam
Oct 25, 2017
Annex
Search/Exam
Oct 25, 2017
Annex
Search/Exam
Oct 25, 2017
Annex
Search/Exam
Oct 25, 2017
Annex
Search/Exam
Oct 25, 2017
Request for entry into the European phase
Search/Exam
Oct 9, 2017
Sep 25, 2017
Abstract
PCTISA
Sep 25, 2017
Annex
PCTISA
Sep 25, 2017
Claims
PCTISA
Sep 25, 2017
Description
PCTISA
Sep 25, 2017
Drawings
PCTISA
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017
Sep 25, 2017