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The patent EP1871861 was granted to Exxonmobil Chemical Patents on Jan 15, 2020. The application was filed on Feb 21, 2006 under application number EP06735603A. 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 |
|---|---|---|---|
| NEW MARKET SERVICES | Oct 15, 2020 | SSM SANDMAIR | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0074724 |
| DESCRIPTION | EP0186473 |
| DESCRIPTION | JPH07278142 |
| DESCRIPTION | JPH09235581 |
| DESCRIPTION | JPH10316987 |
| DESCRIPTION | RO118447 |
| DESCRIPTION | US2002086802 |
| DESCRIPTION | US5451332 |
| DESCRIPTION | US6573223 |
| EXAMINATION | US3197405 |
| EXAMINATION | US5256320 |
| EXAMINATION | US6046144 |
| EXAMINATION | WO2006115666 |
| INTERNATIONAL-SEARCH-REPORT | US2002086802 |
| INTERNATIONAL-SEARCH-REPORT | US5750478 |
| INTERNATIONAL-SEARCH-REPORT | US6048825 |
| INTERNATIONAL-SEARCH-REPORT | US6573223 |
| OPPOSITION | CN1057477 |
| OPPOSITION | CN1203262 |
| OPPOSITION | EP0094144 |
| OPPOSITION | GB1569730 |
| OPPOSITION | JP2004059658 |
| OPPOSITION | JPH09235581 |
| OPPOSITION | PL166240B |
| OPPOSITION | US2006240998 |
| OPPOSITION | US3272746 |
| OPPOSITION | US3359203 |
| OPPOSITION | US3901932 |
| OPPOSITION | US3919096 |
| OPPOSITION | US4110233 |
| OPPOSITION | US4119549 |
| OPPOSITION | US4744912 |
| OPPOSITION | US4959166 |
| OPPOSITION | US5256320 |
| OPPOSITION | US6645920 |
| OPPOSITION | US6743759 |
| OPPOSITION | WO03044139 |
| OPPOSITION | WO2006115666 |
| OPPOSITION | WO9520592 |
| OTHER | EP0094144 |
| OTHER | EP1471133 |
| OTHER | US4119549 |
| OTHER | US5925600 |
| OTHER | US6187723 |
| OTHER | US6531429 |
| OTHER | US6660695 |
| OTHER | US7598211 |
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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Amended description with annotations
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Description
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Nov 8, 2019
French translation of claims
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German translation of the claims
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Nov 8, 2019
Letter accompanying subsequently filed items
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Apr 29, 2019
Description
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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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Nov 5, 2018
(Electronic) Receipt
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Nov 5, 2018
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Letter accompanying subsequently filed items
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Apr 30, 2018
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Non-patent literature filed by a third party
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May 5, 2015
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Dec 5, 2014
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Nov 7, 2006
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Copy of the international search report
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Oct 19, 2006
Published international application - A1
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