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The patent EP3941307 was granted to Dyson Technology on Dec 28, 2022. The application was filed on Feb 25, 2020 under application number EP20709668A. 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 |
|---|---|---|---|
| JEMELLA | Dec 29, 2022 | MACDOUGALL | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | DE202009001872U |
| INTERNATIONAL-SEARCH-REPORT | EP2399481 |
| INTERNATIONAL-SEARCH-REPORT | GB2505171 |
| INTERNATIONAL-SEARCH-REPORT | KR100865865B |
| INTERNATIONAL-SEARCH-REPORT | US2013247407 |
| INTERNATIONAL-SEARCH-REPORT | US2018055178 |
| OPPOSITION | DE202009001872U |
| OPPOSITION | EP2399481 |
| OPPOSITION | EP2433519 |
| OPPOSITION | GB2505171 |
| OPPOSITION | GB2545233 |
| OPPOSITION | US2007294909 |
| OPPOSITION | US2008236604 |
| OPPOSITION | US2010089413 |
| OPPOSITION | US2013247407 |
| OPPOSITION | US2015335128 |
| OPPOSITION | US2017135457 |
| OPPOSITION | US2017273425 |
| OPPOSITION | US2018055178 |
| OPPOSITION | WO2012033392 |
| OPPOSITION | WO2013104903 |
| OPPOSITION | WO2013144556 |
| OPPOSITION | WO2013186507 |
| OPPOSITION | WO2016132116 |
| OPPOSITION | WO2017046588 |
| OPPOSITION | WO2017163068 |
| OPPOSITION | WO2018093428 |
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 9, 2025
Dec 9, 2025
Dec 4, 2025
Nov 7, 2025
Nov 6, 2025
Nov 3, 2025
(Electronic) Receipt
Appeal
Nov 3, 2025
Nov 3, 2025
Reply to appeal
Appeal
Oct 31, 2025
(Electronic) Receipt
Appeal
Oct 31, 2025
(Electronic) Receipt
Appeal
Oct 31, 2025
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Reply to appeal
Appeal
Oct 31, 2025
Reply to appeal
Appeal
Jul 24, 2025
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(Electronic) Receipt
Appeal
Jun 25, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Apr 25, 2025
(Electronic) Receipt
Appeal
Apr 25, 2025
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Notice of appeal
Appeal
Apr 25, 2025
Notice of appeal
Appeal
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Authorisation
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Dec 1, 2022
Decision to grant a European patent
Search/Exam
Nov 18, 2022
(Electronic) Receipt
Search/Exam
Nov 18, 2022
Filing of the translations of the claims
Search/Exam
Nov 18, 2022
French translation of claims
Search/Exam
Nov 18, 2022
German translation of the claims
Search/Exam
Nov 18, 2022
Letter accompanying subsequently filed items
Search/Exam
Aug 18, 2022
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Intention to grant (signatures)
Search/Exam
Aug 18, 2022
Text intended for grant (clean copy)
Search/Exam
Aug 18, 2022
Jul 25, 2022
Examination started
Search/Exam
Jun 24, 2022
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Letter accompanying subsequently filed items
Search/Exam
Jun 21, 2022
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Submission concerning representation
Search/Exam
May 6, 2022
(Electronic) Receipt
Search/Exam
May 6, 2022
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Amended claims with annotations
Search/Exam
May 6, 2022
Amendments received before examination
Search/Exam
May 6, 2022
Letter accompanying subsequently filed items
Search/Exam
Jan 5, 2022
Oct 29, 2021
Oct 11, 2021
Jul 26, 2021
Information regarding early processing
Search/Exam
Jul 20, 2021
(Electronic) Receipt
Search/Exam
Jul 20, 2021
Request for entry into the European phase
Search/Exam
Oct 19, 2020
Oct 1, 2020
Copy of the international search report
Search/Exam
Oct 1, 2020
Published international application - A1
Search/Exam
Apr 28, 2020
ISR: cited documents
PCTISA
Apr 28, 2020
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Mar 23, 2020
Mar 6, 2020
Abstract
PCTISA
Mar 6, 2020
Claims
PCTISA
Mar 6, 2020
Description
PCTISA
Mar 6, 2020
Drawings
PCTISA
Mar 6, 2020
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