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The patent EP2999751 was granted to Grace on Jun 27, 2018. The application was filed on Dec 8, 2009 under application number EP09765043A. 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 |
|---|---|---|---|
| PQ PQ SILICAS UK | Feb 11, 2019 | MARKS & CLERK | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP0170356 |
| INTERNATIONAL-SEARCH-REPORT | EP0316066 |
| INTERNATIONAL-SEARCH-REPORT | EP0760387 |
| INTERNATIONAL-SEARCH-REPORT | WO2009065569 |
| OPPOSITION | EP0170356 |
| OPPOSITION | EP0316066 |
| OPPOSITION | EP0760387 |
| OPPOSITION | US4837253 |
| OPPOSITION | WO2009065569 |
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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Claims
OPPO
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May 22, 2018
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Decision to grant a European patent
Search/Exam
Apr 5, 2018
Annexes in respect of a client data request
Search/Exam
Apr 5, 2018
Mar 27, 2018
(Electronic) Receipt
Search/Exam
Mar 27, 2018
Filing of the translations of the claims
Search/Exam
Mar 27, 2018
French translation of claims
Search/Exam
Mar 27, 2018
German translation of the claims
Search/Exam
Mar 27, 2018
Letter accompanying subsequently filed items
Search/Exam
Dec 1, 2017
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Intention to grant (signatures)
Search/Exam
Dec 1, 2017
Text intended for grant (clean copy)
Search/Exam
Dec 1, 2017
Sep 14, 2017
(Electronic) Receipt
Search/Exam
Sep 14, 2017
Amended description with annotations
Search/Exam
Sep 14, 2017
Description
Search/Exam
Sep 14, 2017
Letter accompanying subsequently filed items
Search/Exam
Sep 14, 2017
Aug 4, 2017
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Mar 23, 2017
Annex to the communication
Search/Exam
Mar 23, 2017
Communication from the Examining Division
Search/Exam
Jan 13, 2017
(Electronic) Receipt
Search/Exam
Jan 13, 2017
Amended claims with annotations
Search/Exam
Jan 13, 2017
Claims
Search/Exam
Jan 13, 2017
Letter accompanying subsequently filed items
Search/Exam
Jan 13, 2017
Nov 24, 2016
Nov 16, 2016
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Annex to the communication
Search/Exam
Jul 18, 2016
Communication from the Examining Division
Search/Exam
Jul 5, 2016
Examination started
Search/Exam
May 2, 2016
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Apr 1, 2016
Submission concerning representation
Search/Exam
Mar 2, 2016
May 21, 2015
Sep 1, 2011
Jun 28, 2011
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(Electronic) Receipt
Search/Exam
Jun 27, 2011
Jun 27, 2011
Amendments received before examination
Search/Exam
Jun 27, 2011
Request for entry into the European phase
Search/Exam
Apr 26, 2011
Information on entry into European phase
Search/Exam
Aug 5, 2010
Copy of the international search report
Search/Exam
Aug 5, 2010
Jul 6, 2010
Jun 17, 2010
Published international application - A2
Search/Exam
Jun 16, 2010
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Dec 8, 2009
Abstract
PCTRO
Dec 8, 2009
Claims
PCTRO
Dec 8, 2009
Description
PCTRO