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The patent EP3448435 was granted to Dispersome on Jun 1, 2022. The application was filed on Apr 28, 2017 under application number EP17722708A. 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 |
|---|---|---|---|
| EVONIK OPERATIONS | Feb 28, 2023 | - | ADMISSIBLE |
| GELITA | Feb 28, 2023 | HOEGER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | US2004175328 |
| EXAMINATION | US2005031692 |
| EXAMINATION | WO2009063367 |
| INTERNATIONAL-SEARCH-REPORT | US5384129 |
| INTERNATIONAL-SEARCH-REPORT | WO2016041995 |
| INTERNATIONAL-SEARCH-REPORT | WO9814174 |
| OPPOSITION | JPH11189548 |
| OPPOSITION | US2005031692 |
| OPPOSITION | US2012225118 |
| OPPOSITION | US5384129 |
| OPPOSITION | US5902606 |
| OPPOSITION | WO0162226 |
| OPPOSITION | WO2009063367 |
| OPPOSITION | WO2011031462 |
| OPPOSITION | WO2016041995 |
| OPPOSITION | WO9814174 |
| OTHER | US2004175328 |
| OTHER | US2005031692 |
| OTHER | WO2009063367 |
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 28, 2025
Oct 28, 2025
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(Electronic) Receipt
Appeal
Sep 1, 2025
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(Electronic) Receipt
Appeal
Jun 24, 2025
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Reply to appeal
Appeal
Jun 23, 2025
(Electronic) Receipt
Appeal
Jun 23, 2025
(Electronic) Receipt
Appeal
Jun 23, 2025
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Reply to appeal
Appeal
Jun 23, 2025
Reply to appeal
Appeal
Jun 16, 2025
(Electronic) Receipt
Appeal
Jun 16, 2025
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(Electronic) Receipt
Appeal
Feb 21, 2025
(Electronic) Receipt
Appeal
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Dec 20, 2024
(Electronic) Receipt
Appeal
Dec 20, 2024
(Electronic) Receipt
Appeal
Dec 20, 2024
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Notice of appeal
Appeal
Dec 20, 2024
Notice of appeal
Appeal
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Jun 14, 2022
May 6, 2022
Decision to grant a European patent
Search/Exam
Mar 31, 2022
(Electronic) Receipt
Search/Exam
Mar 31, 2022
Filing of the translations of the claims
Search/Exam
Mar 31, 2022
French translation of claims
Search/Exam
Mar 31, 2022
German translation of the claims
Search/Exam
Mar 31, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 22, 2021
Nov 22, 2021
Nov 22, 2021
Intention to grant (signatures)
Search/Exam
Nov 22, 2021
Text intended for grant (clean copy)
Search/Exam
Nov 22, 2021
Oct 8, 2021
Sep 28, 2021
(Electronic) Receipt
Search/Exam
Sep 28, 2021
Enquiry as to the processing of the file
Search/Exam
Sep 28, 2021
Letter accompanying subsequently filed items
Search/Exam
May 25, 2021
(Electronic) Receipt
Search/Exam
May 25, 2021
Amended claims with annotations
Search/Exam
May 25, 2021
Amended description with annotations
Search/Exam
May 25, 2021
Claims
Search/Exam
May 25, 2021
Description
Search/Exam
May 25, 2021
Letter accompanying subsequently filed items
Search/Exam
May 25, 2021
Jan 28, 2021
Annex to the communication
Search/Exam
Jan 28, 2021
Jan 28, 2021
Nov 16, 2020
(Electronic) Receipt
Search/Exam
Nov 16, 2020
Amended claims with annotations
Search/Exam
Nov 16, 2020
Claims
Search/Exam
Nov 16, 2020
Letter accompanying subsequently filed items
Search/Exam
Nov 16, 2020
Nov 16, 2020
Nov 4, 2020
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Search/Exam
Nov 4, 2020
Consultation by telephone/in person
Search/Exam
Nov 4, 2020
Jul 17, 2020
Annex to the communication
Search/Exam
Jul 17, 2020
Communication from the Examining Division
Search/Exam
Apr 6, 2020
(Electronic) Receipt
Search/Exam
Apr 6, 2020
Amended claims with annotations
Search/Exam
Apr 6, 2020
Annex
Search/Exam
Apr 6, 2020
Annex
Search/Exam
Apr 6, 2020
Annex
Search/Exam
Apr 6, 2020
Claims
Search/Exam
Apr 6, 2020
Letter accompanying subsequently filed items
Search/Exam
Apr 6, 2020
Jan 16, 2020
Jan 13, 2020
(Electronic) Receipt
Search/Exam
Jan 13, 2020
Letter accompanying subsequently filed items
Search/Exam
Jan 13, 2020
Oct 7, 2019
Annex to the communication
Search/Exam
Oct 7, 2019
Consultation by telephone/in person
Search/Exam
Oct 7, 2019
Sep 25, 2019
Annex to the communication
Search/Exam
Sep 25, 2019
Communication from the Examining Division
Search/Exam
Sep 3, 2019
Examination started
Search/Exam
Aug 27, 2019
(Electronic) Receipt
Search/Exam
Aug 27, 2019
Letter accompanying subsequently filed items
Search/Exam
Aug 27, 2019
Aug 13, 2019
(Electronic) Receipt
Search/Exam
Aug 13, 2019
Letter accompanying subsequently filed items
Search/Exam
Aug 13, 2019
Aug 1, 2019
Jun 25, 2019
Jun 25, 2019
Jun 17, 2019
(Electronic) Receipt
Search/Exam
Jun 17, 2019
Letter accompanying subsequently filed items
Search/Exam
Jun 17, 2019
Non-patent literature filed by a third party
Search/Exam
Jun 17, 2019
Non-patent literature filed by a third party
Search/Exam
Jun 17, 2019
Observations by third parties
Search/Exam
Jun 17, 2019
Patent document filed by a Third party
Search/Exam
Jun 17, 2019
Patent document filed by a Third party
Search/Exam
Jun 17, 2019
Patent document filed by a Third party
Search/Exam
Feb 6, 2019
Dec 14, 2018
Dec 12, 2018
Communication to designated inventor
Search/Exam
Dec 12, 2018
Communication to designated inventor
Search/Exam
Dec 7, 2018
Priority search results copy provided by EPO
Search/Exam
Nov 21, 2018
(Electronic) Receipt
Search/Exam
Nov 21, 2018
Nov 21, 2018
Request for entry into the European phase
Search/Exam
Nov 7, 2018
Nov 7, 2018
Sep 7, 2018
Information on entry into European phase
Search/Exam
Jul 13, 2018
Jul 13, 2018
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Jul 13, 2018
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Jun 19, 2018
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Annex
PCT2
Jun 19, 2018
May 17, 2018
May 17, 2018
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Apr 18, 2018
Apr 18, 2018
Apr 18, 2018
Mar 27, 2018
Written opinion
PCT2
Mar 27, 2018
Mar 27, 2018
Feb 1, 2018
Notification of election of EPO
Search/Exam
Jan 2, 2018
Notification of election of EPO
Search/Exam
Dec 7, 2017
Nov 29, 2017
Nov 29, 2017
Annex
PCT2
Nov 29, 2017
PCT demand form
PCT2
Nov 29, 2017
Nov 29, 2017
Nov 29, 2017
Nov 29, 2017
Nov 29, 2017
Nov 21, 2017
Nov 21, 2017
Nov 2, 2017
Copy of the international search report
Search/Exam
Nov 2, 2017
Published international application - A1
Search/Exam
Aug 17, 2017
ISR: cited documents
PCTISA
Aug 16, 2017
Aug 16, 2017
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Jul 11, 2017
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Jun 20, 2017
(Electronic) Receipt
PCTRO
Jun 20, 2017
Jun 20, 2017
RO101 Declaration
PCTRO
May 23, 2017
May 23, 2017
May 19, 2017
Apr 28, 2017
(Electronic) Receipt
PCTRO
Apr 28, 2017
(Electronic) Receipt
PCTRO
Apr 28, 2017
Abstract
PCTRO
Apr 28, 2017
Claims
PCTRO
Apr 28, 2017
Description
PCTRO
Apr 28, 2017
Apr 28, 2017
Drawings
PCTRO
Apr 28, 2017
Apr 28, 2017