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The patent EP3176240 was granted to Chevron Oronite on Sep 7, 2022. The application was filed on Nov 4, 2016 under application number EP16197328A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| SASOL PERFORMANCE CHEMICALS | Feb 20, 2020 | MULLER SCHUPFNER & PARTNER PATENT UND RECHTSANWALTSPARTNERSCHAFT MBB MUC | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US5482908 |
| OPPOSITION | GB1453005 |
| OPPOSITION | US2014083707 |
| OPPOSITION | US2015252247 |
| OPPOSITION | US3919125 |
| OPPOSITION | US4311650 |
| OPPOSITION | WO2010121975 |
| OPPOSITION | WO2014136091 |
| SEARCH | EP0431653 |
| SEARCH | US2011083847 |
| SEARCH | US4592875 |
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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Apr 25, 2019
Submission concerning representation
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Intention to grant (signatures)
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Apr 10, 2019
Text intended for grant (clean copy)
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Mar 26, 2019
(Electronic) Receipt
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Amended claims with annotations
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Amended description with annotations
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Claims
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Mar 26, 2019
Description
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Mar 26, 2019
French translation of claims
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Mar 26, 2019
German translation of the claims
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Mar 26, 2019
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Nov 16, 2018
Text intended for grant (clean copy)
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Nov 16, 2018
Jun 29, 2018
(Electronic) Receipt
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Jun 29, 2018
Letter accompanying subsequently filed items
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Annex to the communication
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Mar 29, 2018
Communication from the Examining Division
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Mar 26, 2018
Examination started
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Nov 27, 2017
(Electronic) Receipt
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Nov 27, 2017
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Amended claims with annotations
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Nov 27, 2017
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Amended description with annotations
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Nov 27, 2017
Amendments received before examination
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Nov 27, 2017
Letter accompanying subsequently filed items
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Jun 12, 2017
May 10, 2017
Notification of forthcoming publication
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European search opinion
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European search report
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Apr 3, 2017
Information on Search Strategy
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Search started
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Mar 7, 2017
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Communication to designated inventor
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Communication to designated inventor
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Nov 4, 2016
Abstract
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Nov 4, 2016
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Claims
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Nov 4, 2016
Description
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Nov 4, 2016
Designation of inventor
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Nov 4, 2016
Drawings
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Nov 4, 2016
Request for grant of a European patent
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