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The patent EP3661984 was granted to Exxonmobil Chemical Patents on Jan 19, 2022. The application was filed on Jun 29, 2018 under application number EP18746361A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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 |
|---|---|---|---|
| THE DOW CHEMICAL | Oct 18, 2022 | BECK GREENER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2016US28271 |
| DESCRIPTION | US2015291748 |
| DESCRIPTION | US2016060430 |
| DESCRIPTION | US4543399 |
| DESCRIPTION | US4588790 |
| DESCRIPTION | US5028670 |
| DESCRIPTION | US5041584 |
| DESCRIPTION | US5153157 |
| DESCRIPTION | US5241025 |
| DESCRIPTION | US5317036 |
| DESCRIPTION | US5352749 |
| DESCRIPTION | US5405922 |
| DESCRIPTION | US5436304 |
| DESCRIPTION | US5453471 |
| DESCRIPTION | US5462999 |
| DESCRIPTION | US5616661 |
| DESCRIPTION | US5668228 |
| DESCRIPTION | US5741563 |
| DESCRIPTION | US5942459 |
| DESCRIPTION | US6211105 |
| DESCRIPTION | US6242545 |
| DESCRIPTION | US6248845 |
| DESCRIPTION | US6342566 |
| DESCRIPTION | US6384142 |
| DESCRIPTION | US6528597 |
| DESCRIPTION | US6936675 |
| DESCRIPTION | US6956088 |
| DESCRIPTION | US7172816 |
| DESCRIPTION | US7179876 |
| DESCRIPTION | US7381783 |
| DESCRIPTION | US8247065 |
| DESCRIPTION | US8378043 |
| DESCRIPTION | US8476392 |
| DESCRIPTION | US8658556 |
| DESCRIPTION | WO03040201 |
| DESCRIPTION | WO2004022646 |
| DESCRIPTION | WO9109882 |
| DESCRIPTION | WO9314132 |
| DESCRIPTION | WO9403506 |
| DESCRIPTION | WO9507941 |
| DESCRIPTION | WO9719991 |
| DESCRIPTION | WO9843983 |
| INTERNATIONAL-SEARCH-REPORT | US2013029125 |
| INTERNATIONAL-SEARCH-REPORT | US2015291748 |
| INTERNATIONAL-SEARCH-REPORT | WO2018106388 |
| OPPOSITION | US2013029125 |
| OPPOSITION | US2015291748 |
| OPPOSITION | WO2017132092 |
| OPPOSITION | WO2018106388 |
| OPPOSITION | WO2019083716 |
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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Dec 2, 2025
Nov 28, 2025
(Electronic) Receipt
Appeal
Nov 28, 2025
Nov 28, 2025
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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May 28, 2025
(Electronic) Receipt
Appeal
May 28, 2025
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May 26, 2025
(Electronic) Receipt
Appeal
May 26, 2025
General authorisation
Appeal
May 26, 2025
May 26, 2025
Reply to appeal
Appeal
Jan 28, 2025
Jan 24, 2025
(Electronic) Receipt
Appeal
Jan 24, 2025
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(Electronic) Receipt
Appeal
Oct 10, 2024
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Notice of appeal
Appeal
Oct 9, 2024
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Feb 1, 2022
Dec 23, 2021
Decision to grant a European patent
Search/Exam
Dec 10, 2021
(Electronic) Receipt
Search/Exam
Dec 10, 2021
Filing of the translations of the claims
Search/Exam
Dec 10, 2021
French translation of claims
Search/Exam
Dec 10, 2021
German translation of the claims
Search/Exam
Sep 8, 2021
Sep 8, 2021
Sep 8, 2021
Text intended for grant (clean copy)
Search/Exam
Sep 8, 2021
Jul 12, 2021
Intention to grant (signatures)
Search/Exam
Apr 13, 2021
(Electronic) Receipt
Search/Exam
Apr 13, 2021
Amended claims with annotations
Search/Exam
Apr 13, 2021
Amended description with annotations
Search/Exam
Apr 13, 2021
Claims
Search/Exam
Apr 13, 2021
Description
Search/Exam
Apr 13, 2021
Letter accompanying subsequently filed items
Search/Exam
Apr 13, 2021
Dec 15, 2020
Annex to the communication
Search/Exam
Dec 15, 2020
Communication from the Examining Division
Search/Exam
Dec 7, 2020
Examination started
Search/Exam
Sep 10, 2020
(Electronic) Receipt
Search/Exam
Sep 10, 2020
Sep 10, 2020
Amended claims with annotations
Search/Exam
Sep 10, 2020
Amendments received before examination
Search/Exam
Sep 10, 2020
Letter accompanying subsequently filed items
Search/Exam
Aug 10, 2020
Communication to designated inventor
Search/Exam
Aug 4, 2020
(Electronic) Receipt
Search/Exam
Aug 4, 2020
Letter accompanying subsequently filed items
Search/Exam
Aug 4, 2020
Letter concerning the inventor
Search/Exam
Jul 13, 2020
Jul 7, 2020
Letter which had not been notified
Search/Exam
Jun 10, 2020
Communication to designated inventor
Search/Exam
Jun 10, 2020
Jun 4, 2020
(Electronic) Receipt
Search/Exam
Jun 4, 2020
Letter accompanying subsequently filed items
Search/Exam
Jun 4, 2020
Letter concerning the inventor
Search/Exam
May 28, 2020
May 25, 2020
Letter which had not been notified
Search/Exam
May 13, 2020
Mar 11, 2020
Mar 9, 2020
Communication to designated inventor
Search/Exam
Mar 9, 2020
Communication to designated inventor
Search/Exam
Mar 9, 2020
Communication to designated inventor
Search/Exam
Mar 9, 2020
Communication to designated inventor
Search/Exam
Mar 9, 2020
Communication to designated inventor
Search/Exam
Feb 28, 2020
(Electronic) Receipt
Search/Exam
Feb 28, 2020
Feb 28, 2020
Amendments received before examination
Search/Exam
Feb 28, 2020
Request for entry into the European phase
Search/Exam
Feb 21, 2020
Dec 13, 2019
Information on entry into European phase
Search/Exam
Feb 27, 2019
Feb 27, 2019
Feb 7, 2019
Copy of the international search report
Search/Exam
Feb 7, 2019
Published international application - A1
Search/Exam
Nov 2, 2018
ISR: cited documents
PCTISA
Oct 31, 2018
Oct 31, 2018
Oct 31, 2018
Aug 13, 2018
Jul 23, 2018
Abstract
PCTISA
Jul 23, 2018
Annex
PCTISA
Jul 23, 2018
Claims
PCTISA
Jul 23, 2018
Description
PCTISA
Jul 23, 2018
Drawings
PCTISA
Jul 23, 2018
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