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The patent EP3651591 was granted to Essentra Filter Products PTE on Dec 9, 2020. The application was filed on Oct 1, 2018 under application number EP18783398A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| NEMUNO BANGA | Sep 9, 2021 | VIESUNAITE | ADMISSIBLE |
| IMPERIAL TOBACCO | Aug 11, 2021 | MEWBURN ELLIS | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | US5195543 |
| INTERNATIONAL-SEARCH-REPORT | GB625391 |
| INTERNATIONAL-SEARCH-REPORT | US2016165950 |
| INTERNATIONAL-SEARCH-REPORT | US2016366926 |
| INTERNATIONAL-SEARCH-REPORT | US2017273349 |
| INTERNATIONAL-SEARCH-REPORT | US4515170 |
| INTERNATIONAL-SEARCH-REPORT | WO2014064087 |
| INTERNATIONAL-SEARCH-REPORT | WO2014068295 |
| OPPOSITION | CH466778 |
| OPPOSITION | CN103271437 |
| OPPOSITION | CN203699553U |
| OPPOSITION | EP1072201 |
| OPPOSITION | EP3295811 |
| OPPOSITION | GB1115485 |
| OPPOSITION | GB2124469 |
| OPPOSITION | GB2406780 |
| OPPOSITION | US2012255569 |
| OPPOSITION | US2015272207 |
| OPPOSITION | US2016366926 |
| OPPOSITION | US2017188623 |
| OPPOSITION | US2017273349 |
| OPPOSITION | US2018000152 |
| OPPOSITION | US3095343 |
| OPPOSITION | US3242925 |
| OPPOSITION | US3560298 |
| OPPOSITION | US4784632 |
| OPPOSITION | WO2013004994 |
| OPPOSITION | WO2014064087 |
| OPPOSITION | WO2014198815 |
| OPPOSITION | WO2016181843 |
| OPPOSITION | WO2017068437 |
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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Decision to grant a European patent
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(Electronic) Receipt
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Filing of the translations of the claims
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French translation of claims
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German translation of the claims
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Letter concerning fees and payments
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Intention to grant (signatures)
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Letter accompanying subsequently filed items
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Annex to the communication
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Communication from the Examining Division
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Examination started
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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Apr 28, 2020
Matter concerning the application
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Refund of fees
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(Electronic) Receipt
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Amended claims with annotations
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Mar 30, 2020
Letter concerning fees and payments
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Information on entry into European phase
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(Electronic) Receipt
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Feb 10, 2020
Request for entry into the European phase
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Copy of the international search report
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Apr 11, 2019
Published international application - A1
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(Electronic) Receipt
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Abstract
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ISR: cited documents
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PCTRO
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Abstract
PCTRO
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Claims
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Description
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