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The patent EP2571808 was granted to Grace on Jul 17, 2019. The application was filed on May 19, 2011 under application number EP11721235A. 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 | Apr 17, 2020 | MARKS & CLERK | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE1006100 |
| DESCRIPTION | DE1592865 |
| DESCRIPTION | US5221337 |
| DESCRIPTION | US6294505 |
| EXAMINATION | US2002102198 |
| EXAMINATION | US2010083876 |
| EXAMINATION | US5342876 |
| EXAMINATION | US5643624 |
| INTERNATIONAL-SEARCH-REPORT | DE102008017747 |
| INTERNATIONAL-SEARCH-REPORT | US2008153694 |
| INTERNATIONAL-SEARCH-REPORT | US2008160053 |
| INTERNATIONAL-SEARCH-REPORT | US7566433 |
| INTERNATIONAL-SEARCH-REPORT | WO03055802 |
| INTERNATIONAL-SEARCH-REPORT | WO2004073539 |
| OPPOSITION | EP0287232 |
| OPPOSITION | GB1263945 |
| OPPOSITION | US2002102198 |
| OPPOSITION | US2008153694 |
| OPPOSITION | US2008160053 |
| OPPOSITION | US5624652 |
| OPPOSITION | US6565905 |
| OPPOSITION | US7566433 |
| OPPOSITION | WO03055802 |
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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Jul 29, 2019
Jun 21, 2019
Decision to grant a European patent
Search/Exam
Jun 6, 2019
(Electronic) Receipt
Search/Exam
Jun 6, 2019
Filing of the translations of the claims
Search/Exam
Jun 6, 2019
French translation of claims
Search/Exam
Jun 6, 2019
German translation of the claims
Search/Exam
Jun 6, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 15, 2019
Feb 15, 2019
Feb 15, 2019
Intention to grant (signatures)
Search/Exam
Feb 15, 2019
Text intended for grant (clean copy)
Search/Exam
Feb 15, 2019
May 4, 2018
(Electronic) Receipt
Search/Exam
May 4, 2018
Amended claims with annotations
Search/Exam
May 4, 2018
Amended description with annotations
Search/Exam
May 4, 2018
Amended drawings with annotations
Search/Exam
May 4, 2018
Claims
Search/Exam
May 4, 2018
Description
Search/Exam
May 4, 2018
Drawings
Search/Exam
May 4, 2018
Letter accompanying subsequently filed items
Search/Exam
May 4, 2018
Apr 25, 2018
Apr 5, 2018
Annexes in respect of a client data request
Search/Exam
Apr 5, 2018
Oct 31, 2017
Annex to the communication
Search/Exam
Oct 31, 2017
Communication from the Examining Division
Search/Exam
Feb 3, 2017
Decision to allow further processing
Search/Exam
Jan 18, 2017
(Electronic) Receipt
Search/Exam
Jan 18, 2017
Amended claims with annotations
Search/Exam
Jan 18, 2017
Claims
Search/Exam
Jan 18, 2017
Letter accompanying subsequently filed items
Search/Exam
Jan 18, 2017
Request for further processing
Search/Exam
Nov 23, 2016
Oct 31, 2016
Oct 13, 2016
Apr 13, 2016
Apr 11, 2016
Annex to the communication
Search/Exam
Apr 11, 2016
Apr 11, 2016
Information on Search Strategy
Search/Exam
Apr 11, 2016
Search results under rule 164(2)(b) EPC
Search/Exam
Apr 1, 2016
Submission concerning representation
Search/Exam
Mar 17, 2016
Search started
Search/Exam
Feb 3, 2016
(Electronic) Receipt
Search/Exam
Feb 3, 2016
Letter accompanying subsequently filed items
Search/Exam
Feb 3, 2016
Letter concerning fees and payments
Search/Exam
Dec 4, 2015
Annex to the communication
Search/Exam
Dec 4, 2015
May 21, 2015
May 15, 2015
Dec 2, 2013
Letter concerning the priority
Search/Exam
Dec 2, 2013
Priority document
Search/Exam
Jul 2, 2013
(Electronic) Receipt
Search/Exam
Jul 2, 2013
(Electronic) Receipt
Search/Exam
Jul 2, 2013
Jul 2, 2013
Amended claims with annotations
Search/Exam
Jul 2, 2013
Amendments received before examination
Search/Exam
Jul 2, 2013
Letter accompanying subsequently filed items
Search/Exam
Jul 2, 2013
Letter accompanying subsequently filed items
Search/Exam
Jul 2, 2013
Letter concerning fees and payments
Search/Exam
Jun 3, 2013
May 28, 2013
Annex
Search/Exam
May 21, 2013
Invitation to file priority document
Search/Exam
May 7, 2013
Reply by International Bureau
Search/Exam
Apr 19, 2013
Enquiry with the International Bureau
Search/Exam
Feb 27, 2013
Jan 8, 2013
Jan 4, 2013
Communication to designated inventor
Search/Exam
Jan 4, 2013
Communication to designated inventor
Search/Exam
Dec 12, 2012
Oct 30, 2012
(Electronic) Receipt
Search/Exam
Oct 30, 2012
Request for entry into the European phase
Search/Exam
Sep 28, 2012
Information on entry into European phase
Search/Exam
Nov 24, 2011
Copy of the international search report
Search/Exam
Nov 24, 2011
Published international application - A1
Search/Exam
Oct 18, 2011
Oct 18, 2011
Oct 18, 2011
May 19, 2011
Abstract
PCTRO
May 19, 2011
Claims
PCTRO
May 19, 2011
Description
PCTRO
May 19, 2011
Drawings
PCTRO