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The patent EP3431074 was granted to Allergan on Jan 19, 2022. The application was filed on Jul 28, 2011 under application number EP18182158A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
Preservative-free eye drops containing bimatoprost and timolol for treating glaucoma and ocular hypertension without the side effects of benzalkonium chloride preservative. The formulations aim to improve efficacy, patient compliance, and reduce ocular surface disease compared to preserved bimatoprost drops. The preservative-free drops avoid issues like hyperemia, irritation, corneal erosion, dryness, and discharge associated with benzalkonium chloride. The absence of the preservative allows use by sensitive patients and avoids contact lens absorption issues.

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 |
|---|---|---|---|
| GENERICS UK | Oct 19, 2022 | ELKINGTON AND FIFE | ADMISSIBLE |
| MAIWALD | Oct 19, 2022 | MAIWALD | ADMISSIBLE |
| SIFI | Oct 19, 2022 | CATTANEO | WITHDRAWN |
| BAUSCH LOMB IRELAND | Oct 18, 2022 | MAIWALD | ADMISSIBLE |
| STADA ARZNEIMITTEL | Oct 17, 2022 | KRAUS & LEDERER PARTGMBB | ADMISSIBLE |
| WACHTERSHAUSER & HARTZ PATENTANWALTSPARTNERSCHAFT MBB BLODIG | Oct 11, 2022 | - | WITHDRAWN |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US20020153043 |
| OPPOSITION | EP0182158 |
| OPPOSITION | EP1818215 |
| OPPOSITION | EP2127638 |
| OPPOSITION | EP2598118 |
| OPPOSITION | FR2918891 |
| OPPOSITION | US2004082660 |
| OPPOSITION | US2010210720 |
| OPPOSITION | US368685 |
| OPPOSITION | WO02096432 |
| OPPOSITION | WO2006101839 |
| OPPOSITION | WO2009064327 |
| OPPOSITION | WO2012015998 |
| OPPOSITION | WO9517152 |
| OTHER | EP2598118 |
| SEARCH | EP2127638 |
| SEARCH | FR2918891 |
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.
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Description
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Nov 19, 2025
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Feb 10, 2021
Communication from the Examining Division
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Feb 5, 2021
Examination started
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Nov 20, 2019
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Maintenance of the application
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Jan 28, 2019
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Notification of forthcoming publication
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Nov 21, 2018
Refund of fees
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Nov 6, 2018
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European search opinion
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European search report
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Nov 6, 2018
Information on Search Strategy
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Letter which had not been notified
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Sep 13, 2018
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Claims
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Invitation to file claims
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Jul 6, 2018
Abstract
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Designation of inventor
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Request for grant of a European patent
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