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The patent EP3459578 was granted to Pfizer on Mar 3, 2021. The application was filed on Jun 25, 2004 under application number EP18204617A. 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 |
|---|---|---|---|
| GLAXO GROUP | Dec 2, 2021 | HOFFMANN EITLE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US4811731 |
| OPPOSITION | EP0069715 |
| OPPOSITION | EP0211595 |
| OPPOSITION | EP0237507 |
| OPPOSITION | EP0539469 |
| OPPOSITION | EP1730676 |
| OPPOSITION | GB2242134 |
| OPPOSITION | US3818689 |
| OPPOSITION | US4524769 |
| OPPOSITION | US6076521 |
| OPPOSITION | US6182655 |
| OPPOSITION | WO0064519 |
| OPPOSITION | WO0131578 |
| OPPOSITION | WO02102444 |
| OPPOSITION | WO03061743 |
| SEARCH | GB2242134 |
| SEARCH | US6182655 |
| SEARCH | WO0131578 |
| SEARCH | WO03028792 |
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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Jan 16, 2026
Jan 16, 2026
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
Sep 5, 2024
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Notice of appeal
Appeal
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OPPO
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Mar 15, 2021
Feb 4, 2021
Decision to grant a European patent
Search/Exam
Jan 22, 2021
(Electronic) Receipt
Search/Exam
Jan 22, 2021
Filing of the translations of the claims
Search/Exam
Jan 22, 2021
French translation of claims
Search/Exam
Jan 22, 2021
German translation of the claims
Search/Exam
Jan 22, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 16, 2020
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Intention to grant (signatures)
Search/Exam
Sep 16, 2020
Text intended for grant (clean copy)
Search/Exam
Sep 16, 2020
Aug 31, 2020
Examination started
Search/Exam
Apr 20, 2020
Decision to allow further processing
Search/Exam
Apr 16, 2020
Apr 16, 2020
Apr 7, 2020
Authorisation
Search/Exam
Apr 7, 2020
Jan 30, 2020
Invitation to file an authorisation
Search/Exam
Jan 20, 2020
(Electronic) Receipt
Search/Exam
Jan 20, 2020
Jan 20, 2020
Amended claims with annotations
Search/Exam
Jan 20, 2020
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Amended description with annotations
Search/Exam
Jan 20, 2020
Amendments received before examination
Search/Exam
Jan 20, 2020
Letter accompanying subsequently filed items
Search/Exam
Nov 8, 2019
Sep 25, 2019
(Electronic) Receipt
Search/Exam
Sep 25, 2019
Letter accompanying subsequently filed items
Search/Exam
Sep 25, 2019
Written request for examination
Search/Exam
Jul 17, 2019
Submission concerning representation
Search/Exam
Apr 24, 2019
Communication to designated inventor
Search/Exam
Apr 16, 2019
(Electronic) Receipt
Search/Exam
Apr 16, 2019
Letter accompanying subsequently filed items
Search/Exam
Apr 16, 2019
Letter concerning the inventor
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Apr 1, 2019
Mar 6, 2019
Refund of fees
Search/Exam
Mar 5, 2019
Feb 27, 2019
Notification of forthcoming publication
Search/Exam
Feb 26, 2019
Letter which had not been notified
Search/Exam
Feb 21, 2019
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European search opinion
Search/Exam
Feb 21, 2019
European search report
Search/Exam
Feb 21, 2019
Information on Search Strategy
Search/Exam
Feb 12, 2019
Search started
Search/Exam
Jan 4, 2019
Communication to designated inventor
Search/Exam
Jan 4, 2019
Communication to designated inventor
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Communication to designated inventor
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Jan 4, 2019
Communication to designated inventor
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Nov 6, 2018
Abstract
Search/Exam
Nov 6, 2018
Nov 6, 2018
Amended claims with annotations
Search/Exam
Nov 6, 2018
Amended description with annotations
Search/Exam
Nov 6, 2018
Amended drawings with annotations
Search/Exam
Nov 6, 2018
Claims
Search/Exam
Nov 6, 2018
Description
Search/Exam
Nov 6, 2018
Designation of inventor
Search/Exam
Nov 6, 2018
Drawings
Search/Exam
Nov 6, 2018
Matter concerning the application
Search/Exam
Nov 6, 2018
Matter concerning the application
Search/Exam
Nov 6, 2018
Request for grant of a European patent
Search/Exam
Feb 8, 2005